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Optical Posts: Ø1/2" and Ø12 mm


  • Precision Ground Stainless Steel or Aluminum Posts
  • 1/4"-20 (M6) Tapped Hole in Base, 8-32 (M4) Removable Setscrew in Top
  • Ø1/2" and Ø12 mm Outer Diameter Posts Available
  • Vacuum-Compatible and Low-Reflectivity Posts Available

TR6

TR4

TR3

TR2

TR2V

Vacuum 
Compatible

TRT2

0.25" (6.4 mm)
Vertical Translation

TR2E

Engraved Graduations

TR3T

TR3C

Application Idea

TRA3

Hard Coat
Aluminum

Stainless Steel Posts

Related Items

Optical Post Tightening
Click to Enlarge
Ø1/8" (Ø3.2 mm) Hole for Extra Leverage During Tightening

Features

  • Precision-Ground Posts with 1/2" (12.7 mm) or 12 mm Diameters
    • Ø1/2" Imperial Posts: Bottom-Located 1/4"-20 Tapped Hole and Top-Located 8-32 Removable Setscrew
    • Ø12.7 mm Metric Posts: Bottom-Located M6 Tapped Hole and Top-Located M4 Removable Setscrew
    • Ø12 mm Metric Posts for Japanese Optomechanics: Bottom-Located M6 Tapped Hole and Top-Located M4 Removable Setscrew (See -JP Item Numbers Below)
  • Three Material Options Available
    • Standard Posts (303 Stainless Steel)
    • Vacuum-Compatible Posts (304L Stainless Steel)
    • Non-Magnetic, Low-Reflectivity Posts (7075-T6 Aluminum with Anodized Hard Coat)
  • Available in a Variety of Lengths Ranging from 0.75" to 12" (20 mm to 300 mm for Metric Posts)
  • Graduated Posts Available to Aid in Optic Alignment

Thorlabs’ Ø1/2" and Ø12 mm Optical Posts are a basic building block required in most rigid constructions and come in a wide range of post lengths ranging from 0.75" to 12" (20 mm to 300 mm for metric posts). Our precision-ground stainless steel posts are fabricated from 303 stainless steel (304L for vacuum-compatible posts) and are compatible with our Ø1/2" post holders and construction accessories. Additionally, we offer non-magnetic Ø1/2" aluminum posts that feature a black anodized hard coating that provides a lower reflectivity surface for applications sensitive to magnetic fields or reflections. 

Along with our standard posts, Thorlabs also manufactures specialty posts for a wide variety of applications. These options include our Ø1/2" graduated posts, Ø1/2" translating optical posts that are ideal for quick, stable height adjustment of a mounted component, and Ø1/2" optical construction posts for mounting in custom configurations. 

All the posts on this page feature a bottom-located 1/4"-20 (M6) tapped hole and top-located 8-32 (M4) removable setscrew, providing compatibility with virtually all of our optic mounts. The 8-32 (M4) tapped hole provides additional flexibility by allowing 8-32 (M4) cap screws to be used with our universal mounts. All our posts, except the translating posts, feature a Ø1/8" (Ø3.2 mm) hole for slipping a balldriver through the post for extra leverage when tightening components.

Thorlabs offers a line of adapters and accessories that increase the usability of these posts, including electrical isolation adapters and anti-rotation adapters. Please see our complete line of Ø1/2" Post Assemblies for other compatible accessories.

Click the Support Documentation icon document icon or Part Number below to view the available support documentation
Part Number Product Description
TR075 Support Documentation TR075 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 0.75"
TR075-P5 Support Documentation TR075-P5 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 0.75", 5 Pack
TR075V Support Documentation TR075V : Ø1/2" Vacuum-Compatible Optical Post, 8-32 Setscrew, 1/4"-20 Tap, L = 0.75"
TR1 Support Documentation TR1 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1"
TR1.5 Support Documentation TR1.5 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1.5"
TR1.5-P5 Support Documentation TR1.5-P5 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1.5", 5 Pack
TR1.5V Support Documentation TR1.5V : Ø1/2" Vacuum-Compatible Optical Post, 8-32 Setscrew, 1/4"-20 Tap, L = 1.5"
TR10 Support Documentation TR10 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 10"
TR100/M Support Documentation TR100/M : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 100 mm
TR100/M-JP Support Documentation TR100/M-JP : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 100 mm
TR100/M-JP-P5 Support Documentation TR100/M-JP-P5 : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 100 mm, 5 Pack
TR100/M-P5 Support Documentation TR100/M-P5 : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 100 mm, 5 Pack
TR12 Support Documentation TR12 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 12"
TR150/M Support Documentation TR150/M : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 150 mm
TR150/M-JP Support Documentation TR150/M-JP : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 150 mm
TR150/M-P5 Support Documentation TR150/M-P5 : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 150 mm, 5 Pack
TR1-P5 Support Documentation TR1-P5 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1", 5 Pack
TR1V Support Documentation TR1V : Ø1/2" Vacuum-Compatible Optical Post, 8-32 Setscrew, 1/4"-20 Tap, L = 1"
TR2 Support Documentation TR2 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
TR20/M Support Documentation TR20/M : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 20 mm
TR20/M-JP Support Documentation TR20/M-JP : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 20 mm
TR20/M-JP-P5 Support Documentation TR20/M-JP-P5 : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 20 mm, 5 Pack
TR20/M-P5 Support Documentation TR20/M-P5 : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 20 mm, 5 Pack
TR200/M Support Documentation TR200/M : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 200 mm
TR200/M-JP Support Documentation TR200/M-JP : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 200 mm
TR20V/M Support Documentation TR20V/M : Ø12.7 mm Vacuum-Compatible Optical Post, M4 Setscrew, M6 Tap, L = 20 mm
TR250/M Support Documentation TR250/M : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 250 mm
TR250/M-JP Support Documentation TR250/M-JP : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 250 mm
TR2E Support Documentation TR2E : Ø1/2" Graduated Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
TR2-P5 Support Documentation TR2-P5 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2", 5 Pack
TR2V Support Documentation TR2V : Ø1/2" Vacuum-Compatible Optical Post, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
TR3 Support Documentation TR3 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
TR30/M Support Documentation TR30/M : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 30 mm
TR30/M-JP Support Documentation TR30/M-JP : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 30 mm
TR30/M-JP-P5 Support Documentation TR30/M-JP-P5 : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 30 mm, 5 Pack
TR30/M-P5 Support Documentation TR30/M-P5 : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 30 mm, 5 Pack
TR300/M Support Documentation TR300/M : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 300 mm
TR300/M-JP Support Documentation TR300/M-JP : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 300 mm
TR30V/M Support Documentation TR30V/M : Ø12.7 mm Vacuum-Compatible Optical Post, M4 Setscrew, M6 Tap, L = 30 mm
TR3C Support Documentation TR3C : Ø1/2" Optical Construction Post, SS, #8 Counterbores
Part Number Product Description
TR3E Support Documentation TR3E : Ø1/2" Graduated Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
TR3-P5 Support Documentation TR3-P5 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3", 5 Pack
TR3T Support Documentation TR3T : Ø1/2" Optical Construction Post, SS, 8-32 Taps
TR3V Support Documentation TR3V : Ø1/2" Vacuum-Compatible Optical Post, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
TR4 Support Documentation TR4 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 4"
TR40/M Support Documentation TR40/M : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 40 mm
TR40/M-JP Support Documentation TR40/M-JP : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 40 mm
TR40/M-JP-P5 Support Documentation TR40/M-JP-P5 : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 40 mm, 5 Pack
TR40/M-P5 Support Documentation TR40/M-P5 : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 40 mm, 5 Pack
TR40V/M Support Documentation TR40V/M : Ø12.7 mm Vacuum-Compatible Optical Post, M4 Setscrew, M6 Tap, L = 40 mm
TR4-P5 Support Documentation TR4-P5 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 4", 5 Pack
TR50/M Support Documentation TR50/M : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm
TR50/M-JP Support Documentation TR50/M-JP : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm
TR50/M-JP-P5 Support Documentation TR50/M-JP-P5 : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm, 5 Pack
TR50/M-P5 Support Documentation TR50/M-P5 : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm, 5 Pack
TR50E/M Support Documentation TR50E/M : Ø12.7 mm Graduated Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm
TR50V/M Support Documentation TR50V/M : Ø12.7 mm Vacuum-Compatible Optical Post, M4 Setscrew, M6 Tap, L = 50 mm
TR6 Support Documentation TR6 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 6"
TR6-P5 Support Documentation TR6-P5 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 6", 5 Pack
TR75/M Support Documentation TR75/M : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
TR75/M-JP Support Documentation TR75/M-JP : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
TR75/M-JP-P5 Support Documentation TR75/M-JP-P5 : Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm, 5 Pack
TR75/M-P5 Support Documentation TR75/M-P5 : Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm, 5 Pack
TR75C/M Support Documentation TR75C/M : Ø12.7 mm Optical Construction Post, SS, M4 Counterbores
TR75E/M Support Documentation TR75E/M : Ø12.7 mm Graduated Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
TR75T/M Support Documentation TR75T/M : Ø12.7 mm Optical Construction Post, SS, M4 Taps
TR75V/M Support Documentation TR75V/M : Ø12.7 mm Vacuum-Compatible Optical Post, M4 Setscrew, M6 Tap, L = 75 mm
TR8 Support Documentation TR8 : Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 8"
TRA1.5 Support Documentation TRA1.5 : Ø1/2" Aluminum Post, 8-32 Setscrew, 1/4"-20 Tap, L = 1.5"
TRA100/M Support Documentation TRA100/M : Ø12.7 mm Aluminum Post, M4 Setscrew, M6 Tap, L = 100 mm
TRA150/M Support Documentation TRA150/M : Ø12.7 mm Aluminum Post, M4 Setscrew, M6 Tap, L = 150 mm
TRA2 Support Documentation TRA2 : Ø1/2" Aluminum Post, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
TRA3 Support Documentation TRA3 : Ø1/2" Aluminum Post, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
TRA4 Support Documentation TRA4 : Ø1/2" Aluminum Post, 8-32 Setscrew, 1/4"-20 Tap, L = 4"
TRA40/M Support Documentation TRA40/M : Ø12.7 mm Aluminum Post, M4 Setscrew, M6 Tap, L = 40 mm
TRA50/M Support Documentation TRA50/M : Ø12.7 mm Aluminum Post, M4 Setscrew, M6 Tap, L = 50 mm
TRA6 Support Documentation TRA6 : Ø1/2" Aluminum Post, 8-32 Setscrew, 1/4"-20 Tap, L = 6"
TRA75/M Support Documentation TRA75/M : Ø12.7 mm Aluminum Post, M4 Setscrew, M6 Tap, L = 75 mm
TRT2 Support Documentation TRT2 : Ø1/2" Translating Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2" to 2.25"
TRT2/M Support Documentation TRT2/M : Ø12.7 mm Translating Optical Post, SS, M4 Setscrew, M6 Tap, L = 50.8 mm to 57.2 mm

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Posted Comments:
Poster: daniel.weber
Posted Date: 2014-04-05 14:35:41.703
Dear Sir or Madam, do you offer adapter from 8-32 to 1/4"-20 studs for the optical posts. So one could use at the top part of the posts for both thread sizes? Best regards Daniel Weber
Poster: cdaly
Posted Date: 2013-06-11 14:59:00.0
Response from Chris at Thorlabs: Thank you for using our web feedback. Unfortunately, we have not measured the magnetic permeability, but the stainless steel used is 303 grade.
Poster: ChristianTMWeber
Posted Date: 2013-06-10 14:08:30.8
Hello, what is the magnetic permeability of the steel used for the posts? Regards
Poster: cdaly
Posted Date: 2012-11-30 16:23:33.093
Response from Chris at Thorlabs: Thank you for using our feedback feature. We are unable to provide 2010 SolidWorks files directly as the version we use for design (2012) restricts us from creating backwards compatible files, but we do have Step files available for download as well. These files can be opened in SolidWorks 2010 and then saved as an .sldprt file, which will give you the format you require.
Poster: xiaoqiang026403
Posted Date: 2012-11-29 02:12:56.95
I use SolidWorks 2010,but some of your products' Drawing and Documents (SolidWorks) are opened by SolidWorks 2012. Could you send the SolidWorks Documents in version 2010?
Poster: tcohen
Posted Date: 2012-05-22 12:32:00.0
Response from Tim at Thorlabs: Our standard 1/2" Diameter Stainless Steel Optical Posts are machined to a diameter of .499" +.000" -.002".
Poster: ygan1129
Posted Date: 2012-05-21 15:14:28.0
What are the tolerances on the diameter of the posts?
Poster: tcohen
Posted Date: 2012-02-27 11:03:00.0
Response from Tim at Thorlabs: Thank you for your feedback. There are different mounting methods and so your part list will depend on your preferred setup. I have contacted you directly to discuss your options.
Poster: ahmadvand
Posted Date: 2012-02-27 02:32:19.0
Dear Thorlabs; I want to buy below parts for my university. Unfortunatly, I can not choose relevant optomechanic parts, due to the different options. It would be very appreciated if you give me a complete optomechanic list(post, post holder, lens mount, mirror mount, polarizor mount, laser mount) for constructing a setup with the below parts. Best Regards Hossein Ahmadvand Parts: - HNL050L-EC - HeNe Laser, 632.8 nm, 5 mW, Polarized, 220 VAC - GTH10M-A - Mounted Glan Thompson Calcite Polarizer, 10 mm x 10 mm Clear Aperture, 350 - 700 nm AR Coating - LPVISB050-MP - Ø12.5 mm SM05-Mounted Linear Polarizer, VIS B (500 - 720 nm) - DET36A/M - Si Detector, 350-1100 nm, 14 ns Rise Time, 13 mm2, Metric - DET10A/M - Si Detector, 200-1100 nm, 1 ns Rise Time, 0.8 mm2, Metric - CM1-PBS252 - Cube-Mounted Polarizing Beamsplitter, 620 - 1000 nm - MC2000 - Optical Chopper System with MC1F10 10-slot (36°) Chopper Blade - MC1F100 - 100 Slot Blade for Optical Chopper, 250 Hz - 10kHz - PF05-03-P01 - Ø1/2" (Ø12.7 mm) Protected Silver Mirror, 0.24" (6.0 mm) Thick - BB05-E02 - Ø1/2" Broadband Dielectric Mirror, 400-750 nm - LB4915 - f = 50.0 mm, Ø1/2" UV Fused Silica Bi-Convex Lens, Uncoated
Poster: bdada
Posted Date: 2012-02-02 18:54:00.0
Response from Buki at Thorlabs: Thank you for using our feedback forum. We understand that it may not always be convenient to adjust the height of the post within the post holder. We have passed on your suggestion to our design team and we will consider it as we continue to expand our selection of posts. Please contact TechSupport@thorlaabs.com if you have any questions.
Poster:
Posted Date: 2012-02-02 15:37:56.0
I would like to see 2.5" tall posts offered. The gap from 2" to 3" can be critical and hard to fill without a post size in between.
Poster: klee
Posted Date: 2009-12-03 10:46:47.0
A response from Ken at Thorlabs to eoconnor: The tolerance on the length of the post is ±0.005".
Poster: eoconnor
Posted Date: 2009-12-02 21:22:32.0
Can you please give me the tolerance on the length of the post? Thank you!
Poster: Laurie
Posted Date: 2009-01-12 18:46:24.0
Response from Laurie at Thorlabs to wenzao_li: All of the documentation for the product line can be found by clicking on the "Drawings & Documents" Tab on this page. If you experience problems with any of the files, please let us know.
Poster: wenzao_li
Posted Date: 2009-01-12 18:08:13.0
The drawings are missing on this web page http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=1266
Poster: Tyler
Posted Date: 2008-04-09 14:29:12.0
Response from Tyler at Thorlabs: Thank you for the product feedback on the 2.5 mm hole on the post that is used for tightening. I will forward this comment to our product engineers so that they can consider this when designing any future post or post holder products.
Poster:
Posted Date: 2008-04-09 12:31:33.0
The 5/64" (2.5mm) hole is always getting caught in the post holder. This can be somewhat irritating. However, I do like the ability to tighten something down without damaging the outside shank.
Poster: technicalmarketing
Posted Date: 2008-02-08 11:00:42.0
If you are looking for a 12.5 mm diameter post with M4 taps on both ends, you have two options: (1)You can purchase one of our TR series posts and an AS4M6M adapter, which will allow you to switch from the internal M6 threading on the one side of the post to internal M4 threads. (2) Contact our technical support staff (techsupport@thorlabs.com) and request a quote for a custom TR post with M4 taps on both ends.
Poster: hholst-pedersen
Posted Date: 2008-02-08 10:14:39.0
Hi! I need more Ø 12,5mm posts with #8-32 (m4) tapped holes in both top and base. Where can I find that? I only find Ø1/2" posts with #8-32 tapped hole in top and #4-40 in base! Best regards, Hege Holst-Pedersen
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Ø1/2" Stainless Steel Optical Posts - Imperial

  • One 8-32 Tapped Hole on Top and One 1/4"-20 Tapped Hole at Base
  • Removable 8-32 Setscrew
  • Available Individually in Lengths Ranging from 0.75" to 12"
  • Packs of 5 Also Available for 0.75" to 6" Lengths

These virtually non-magnetic 303 stainless steel (SS) posts are precision ground to Ø1/2". One end has a 1/4"-20 tapped hole, while the other end has a removable 8-32 setscrew. A side-located Ø1/8" (Ø3.2 mm) hole is bored straight through the post; a balldriver can be inserted through the hole to provide extra leverage when tightening mounted components. To reduce packaging waste, we offer our most popular sizes in packs of five.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
TR075 Support Documentation
TR075 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 0.75"
$4.74
Today
TR075-P5 Support Documentation
TR075-P5 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 0.75", 5 Pack
$22.55
Today
TR1 Support Documentation
TR1 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1"
$4.74
Today
TR1-P5 Support Documentation
TR1-P5 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1", 5 Pack
$22.55
Today
TR1.5 Support Documentation
TR1.5 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1.5"
$4.97
Today
TR1.5-P5 Support Documentation
TR1.5-P5 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1.5", 5 Pack
$23.60
Today
TR2 Support Documentation
TR2 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
$5.19
Today
TR2-P5 Support Documentation
TR2-P5 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2", 5 Pack
$24.65
Today
TR3 Support Documentation
TR3 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
$5.42
Today
TR3-P5 Support Documentation
TR3-P5 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3", 5 Pack
$25.75
Today
TR4 Support Documentation
TR4 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 4"
$5.87
Today
TR4-P5 Support Documentation
TR4-P5 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 4", 5 Pack
$27.90
Today
TR6 Support Documentation
TR6 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 6"
$6.77
Today
TR6-P5 Support Documentation
TR6-P5 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 6", 5 Pack
$32.15
Today
TR8 Support Documentation
TR8 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 8"
$8.12
Today
TR10 Support Documentation
TR10 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 10"
$9.02
Today
TR12 Support Documentation
TR12 Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 12"
$10.82
Today

Ø12.7 mm Stainless Steel Optical Posts - Metric

  • One M4 Tapped Hole at Top and One M6 Tapped Hole at Base
  • Removable M4 Setscrew
  • Available Individually in Lengths Ranging from 20 to 300 mm
  • Packs of 5 Also Available for 20 to 150 mm Lengths

These virtually non-magnetic 303 stainless steel (SS) posts are precision ground to Ø12.7 mm. One end has an M6 tapped hole, while the other end has a removable M4 setscrew. To easily distinguish these metric posts from their imperial counterparts featured above, the metric posts have a ring-shaped groove in the tapered section of the post. A side-located Ø3.2 mm (Ø1/8") hole is bored straight through the post; a balldriver can be inserted through the hole to provide extra leverage when tightening mounted components. To reduce packaging waste, we offer our most popular sizes in packs of five.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Metric Price Available / Ships
TR20/M Support Documentation
TR20/M Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 20 mm
$4.74
Today
TR20/M-P5 Support Documentation
TR20/M-P5 Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 20 mm, 5 Pack
$22.55
Today
TR30/M Support Documentation
TR30/M Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 30 mm
$4.74
Today
TR30/M-P5 Support Documentation
TR30/M-P5 Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 30 mm, 5 Pack
$22.55
Today
TR40/M Support Documentation
TR40/M Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 40 mm
$4.97
Today
TR40/M-P5 Support Documentation
TR40/M-P5 Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 40 mm, 5 Pack
$23.60
Today
TR50/M Support Documentation
TR50/M Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm
$5.19
Today
TR50/M-P5 Support Documentation
TR50/M-P5 Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm, 5 Pack
$24.65
Today
TR75/M Support Documentation
TR75/M Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
$5.42
Today
TR75/M-P5 Support Documentation
TR75/M-P5 Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm, 5 Pack
$25.75
Today
TR100/M Support Documentation
TR100/M Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 100 mm
$5.87
Today
TR100/M-P5 Support Documentation
TR100/M-P5 Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 100 mm, 5 Pack
$27.90
Today
TR150/M Support Documentation
TR150/M Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 150 mm
$6.77
Today
TR150/M-P5 Support Documentation
TR150/M-P5 Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 150 mm, 5 Pack
$32.15
Today
TR200/M Support Documentation
TR200/M Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 200 mm
$8.12
Today
TR250/M Support Documentation
TR250/M Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 250 mm
$9.02
Today
TR300/M Support Documentation
TR300/M Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 300 mm
$10.82
Today

Ø12 mm Stainless Steel Optical Posts

  • One M4 Tapped Hole at Top and One M6 Tapped Hole at Base
  • Removable M4 Setscrew
  • Ø12 mm Outer Diameter for Compatibility with Japanese Standard Post Holders and Optomechanics
  • Available Individually in Lengths Ranging from 20 to 300 mm
  • Packs of 5 Also Available for 20 to 100 mm Lengths

These virtually non-magnetic 303 stainless steel (SS) posts are precision ground to Ø12 mm. One end has an M6 tapped hole, while the other end has a removable M4 setscrew. To easily distinguish these as metric posts, there is a ring-shaped groove in the tapered section of the post. A side-located Ø3.2 mm (Ø1/8") hole is bored straight through the post; a balldriver can be inserted through the hole to provide extra leverage when tightening mounted components. To reduce packaging waste, we offer our most popular sizes in packs of five.

These Ø12 mm posts are compatible with our standard Ø1/2" Post Holders and all their compatible products.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Metric Price Available / Ships
TR20/M-JP Support Documentation
TR20/M-JP Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 20 mm
$4.74
Today
TR20/M-JP-P5 Support Documentation
TR20/M-JP-P5 Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 20 mm, 5 Pack
$22.55
Today
TR30/M-JP Support Documentation
TR30/M-JP Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 30 mm
$4.74
Today
TR30/M-JP-P5 Support Documentation
TR30/M-JP-P5 Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 30 mm, 5 Pack
$22.55
Today
TR40/M-JP Support Documentation
TR40/M-JP Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 40 mm
$4.97
Today
TR40/M-JP-P5 Support Documentation
TR40/M-JP-P5 Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 40 mm, 5 Pack
$23.60
Today
TR50/M-JP Support Documentation
TR50/M-JP Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm
$5.19
Today
TR50/M-JP-P5 Support Documentation
TR50/M-JP-P5 Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm, 5 Pack
$24.65
Today
TR75/M-JP Support Documentation
TR75/M-JP Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
$5.42
Today
TR75/M-JP-P5 Support Documentation
TR75/M-JP-P5 Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm, 5 Pack
$25.75
Today
TR100/M-JP Support Documentation
TR100/M-JP Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 100 mm
$5.87
Today
TR100/M-JP-P5 Support Documentation
TR100/M-JP-P5 Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 100 mm, 5 Pack
$27.90
Today
TR150/M-JP Support Documentation
TR150/M-JP Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 150 mm
$6.77
Today
TR200/M-JP Support Documentation
TR200/M-JP Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 200 mm
$8.12
Today
TR250/M-JP Support Documentation
TR250/M-JP Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 250 mm
$9.02
Today
TR300/M-JP Support Documentation
TR300/M-JP Ø12 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 300 mm
$10.82
Today

Ø1/2" (Ø12.7 mm) Vacuum-Compatible Posts

Vacuum Compatibility Specifications
Vacuum Compatibility
as Packageda
>10-6 Torr
Materials 304L Stainless Steel (Post)
316 Stainless Steel (Setscrew)
Preparation and
Packaging
Chemically Cleaned and
Double Vacuum Bagged
Stainless Steel
Outgassing Rate at 20 °C
1.8 x 10-8 Torr-Liters/s/cm2
  • This is the pressure at which these components can be used with no additional processing. They can be used at even lower pressures with additional cleaning and processing.
  • Constructed of 304L and 316 Stainless Steel for Vacuum Applications
  • One 8-32 (M4) Tapped Hole on Top and One 1/4"-20 (M6) Tapped Hole at Base
  • Removable Double-Ended 8-32 (M4) Threaded Setscrew
  • Available in Lengths Ranging from 0.75" to 3" (20 mm to 75 mm for Metric Posts)

These virtually non-magnetic, vacuum-compatible 304L stainless steel posts are precision ground to Ø1/2" (Ø12.7 mm). One end has a 1/4"-20 (M6) tapped hole, while the other end has a removable, double-ended 8-32 (M4) threaded setscrew [5/64" (2 mm) hex on both ends]. A side-located Ø1/8" (Ø3.2 mm) hole is bored straight through the post; a balldriver can be inserted through the hole to provide extra leverage when tightening mounted components. The 8-32 (M4) threaded hole is also vented into the side-located Ø1/8" (Ø3.2 mm) hole. We recommend using a vented capscrew in the 1/4"-20 (M6) tapped hole.

Vacuum Compatibility
Our vacuum-compatible posts are chemically cleaned and prepared for vacuum applications before packaging. They are compatible directly out of the packaging with vacuum environments down to 10-6 Torr. With additional cleaning and processing, they can be used at even lower pressures, only limited by the outgassing rate of the stainless steel, which is 1.8 x 10-8 Torr-Liters/s/cm2 at 20 °C. The material properties of the 304L and 316 stainless steel and the cleaning methods that are completed by the end user should be used to determine the appropriateness of these products and materials in a specific vacuum system operating at pressures under 10-6 Torr.

Our vacuum-compatible posts are packaged in double airtight bags for cleanroom and vacuum chamber applications. We also offer additional vacuum-compatible Ø1/2" post system components.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
TR075V Support Documentation
TR075V Ø1/2" Vacuum-Compatible Optical Post, 8-32 Setscrew, 1/4"-20 Tap, L = 0.75"
$9.75
Today
TR1V Support Documentation
TR1V Ø1/2" Vacuum-Compatible Optical Post, 8-32 Setscrew, 1/4"-20 Tap, L = 1"
$10.25
Today
TR1.5V Support Documentation
TR1.5V Ø1/2" Vacuum-Compatible Optical Post, 8-32 Setscrew, 1/4"-20 Tap, L = 1.5"
$12.15
Today
TR2V Support Documentation
TR2V Ø1/2" Vacuum-Compatible Optical Post, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
$12.45
Today
TR3V Support Documentation
TR3V Ø1/2" Vacuum-Compatible Optical Post, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
$12.85
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
TR20V/M Support Documentation
TR20V/M Ø12.7 mm Vacuum-Compatible Optical Post, M4 Setscrew, M6 Tap, L = 20 mm
$9.75
Today
TR30V/M Support Documentation
TR30V/M Ø12.7 mm Vacuum-Compatible Optical Post, M4 Setscrew, M6 Tap, L = 30 mm
$10.25
Today
TR40V/M Support Documentation
TR40V/M Ø12.7 mm Vacuum-Compatible Optical Post, M4 Setscrew, M6 Tap, L = 40 mm
$12.15
Today
TR50V/M Support Documentation
TR50V/M Ø12.7 mm Vacuum-Compatible Optical Post, M4 Setscrew, M6 Tap, L = 50 mm
$12.45
Today
TR75V/M Support Documentation
TR75V/M Ø12.7 mm Vacuum-Compatible Optical Post, M4 Setscrew, M6 Tap, L = 75 mm
$12.85
Today

Ø1/2" (Ø12.7 mm) Non-Magnetic, Low-Reflectivity Aluminum Posts

  • Post Constructed using Non-Magnetic 7075-T6 Aluminum
  • Black Anodized Hard Coating Provides Lower Reflectivity Than Our Stainless Steel Posts
  • One 8-32 (M4) Tapped Hole on Top and One 1/4"-20 (M6) Tapped Hole at Base
  • Removable Double-Ended 8-32 (M4) 303 Stainless Steel Setscrew
  • Available in Lengths Ranging from 1.5" to 6" (40 to 150 mm for Metric Posts)

These non-magnetic Ø1/2" posts are made using precision-ground 7075-T6 aluminum. The anodized hard coat on each post provides an ultra-hardened surface (60 - 70 Rockwell C Scale) for increased wear, abrasion, and corrosion resistance, as well as a black surface for low reflectivity. Therefore, these posts are ideal for applications that are sensitive to magnetic fields or require lower reflection than our stainless steel posts. One end has a 1/4"-20 (M6) tapped hole, while the other end has a double-ended, removable 8-32 (M4) 303 stainless steel setscrew [5/64" (2 mm) hex on both ends]. A side-located Ø1/8" (Ø3.2 mm) hole is bored straight through the post; a balldriver can be inserted through the hole to provide extra leverage when tightening mounted components.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
TRA1.5 Support Documentation
TRA1.5 NEW! Customer Inspired! Ø1/2" Aluminum Post, 8-32 Setscrew, 1/4"-20 Tap, L = 1.5"
$5.47
Today
TRA2 Support Documentation
TRA2 NEW! Customer Inspired! Ø1/2" Aluminum Post, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
$5.71
Today
TRA3 Support Documentation
TRA3 NEW! Customer Inspired! Ø1/2" Aluminum Post, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
$5.96
Today
TRA4 Support Documentation
TRA4 NEW! Customer Inspired! Ø1/2" Aluminum Post, 8-32 Setscrew, 1/4"-20 Tap, L = 4"
$6.46
Today
TRA6 Support Documentation
TRA6 NEW! Customer Inspired! Ø1/2" Aluminum Post, 8-32 Setscrew, 1/4"-20 Tap, L = 6"
$7.45
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
TRA40/M Support Documentation
TRA40/M NEW! Customer Inspired! Ø12.7 mm Aluminum Post, M4 Setscrew, M6 Tap, L = 40 mm
$5.47
Today
TRA50/M Support Documentation
TRA50/M NEW! Customer Inspired! Ø12.7 mm Aluminum Post, M4 Setscrew, M6 Tap, L = 50 mm
$5.71
Today
TRA75/M Support Documentation
TRA75/M NEW! Customer Inspired! Ø12.7 mm Aluminum Post, M4 Setscrew, M6 Tap, L = 75 mm
$5.96
Today
TRA100/M Support Documentation
TRA100/M NEW! Customer Inspired! Ø12.7 mm Aluminum Post, M4 Setscrew, M6 Tap, L = 100 mm
$6.46
Today
TRA150/M Support Documentation
TRA150/M NEW! Customer Inspired! Ø12.7 mm Aluminum Post, M4 Setscrew, M6 Tap, L = 150 mm
$7.45
Today

Ø1/2" (Ø12.7 mm) Graduated Stainless Steel Optical Posts

  • Engraved Scale for Accurate Post Height Adjustments
  • Labeled Increments Every 0.05" (1 mm)
  • Ideal for Use with Lenses in Series

These are identical to our Ø1/2" (Ø12.7 mm) stainless steel (SS) TR posts above, but feature an engraved scale along their side. This scale provides a means to quickly and accurately align optics to your optical axis. A removable 8-32 (M4) setscrew at the top of each post is compatible with many components such as fixed optic mounts, while a 1/4"-20 (M6) tap is on the other end of the post for mounting larger components. A side-located Ø1/8" (Ø3.2 mm) hole is bored straight through the post; a balldriver can be inserted through the hole to provide extra leverage when tightening mounted components.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
TR2E Support Documentation
TR2E Ø1/2" Graduated Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
$12.00
Today
TR3E Support Documentation
TR3E Ø1/2" Graduated Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
$14.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
TR50E/M Support Documentation
TR50E/M Ø12.7 mm Graduated Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm
$12.00
Today
TR75E/M Support Documentation
TR75E/M Ø12.7 mm Graduated Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
$14.00
Today

Ø1/2" (Ø12.7 mm) Translating Optical Posts

  • Provides 0.25" (6.4 mm) of Travel
  • 0.04" (1 mm) Travel per Revolution of Adjustment Ring
  • Anti-Backlash Spring Design
  • Lockable Design with Non-Rotating Tip
  • Removable Double-Ended 8-32 (M4) Threaded Setscrew

The TRT2 translating post has been designed to provide quick, stable height adjustment of a mounted component within an optical setup. One end has a 1/4"-20 (M6) tapped hole, while the other end has a removable, double-ended 8-32 (M4) threaded setscrew [5/64" (2 mm) hex on both ends]. Utilizing a adjustment collar, the TRT2 can translate 0.25" (6.4 mm) from its nominal position via 0.04" (1 mm) translation per revolution. When fully compressed, the post is 2.00" (50.8 mm) and a maximum length of 2.25" (57.2 mm). Once the desired height is achieved, the TRT2 can be locked into place with a built-in locking ring.

Both the adjustment collar and locking ring have diameters slightly smaller than the post diameter, allowing the entire post to pass through all of our Ø1/2" construction accessories without interference. A side-located Ø1/8" (Ø3.2 mm) hole is bored straight through the post; a balldriver can be inserted through the hole to provide extra leverage when tightening mounted components.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
TRT2 Support Documentation
TRT2 Ø1/2" Translating Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2" to 2.25"
$89.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
TRT2/M Support Documentation
TRT2/M Ø12.7 mm Translating Optical Post, SS, M4 Setscrew, M6 Tap, L = 50.8 mm to 57.2 mm
$89.00
Today

Ø1/2" (Ø12.7 mm) Optical Construction Posts

TR3T Application
Click to Enlarge

Side-Mounted KM100 Rests Flat on TR3T
TR3T Application
Click to Enlarge

TR3T and TR3C for Mounting at Arbitrary Angles
  • Counterbored and Tapped Posts for Constructing Custom Mounting Configurations
  • TR3C (TR75C/M): Five #8 (M4) Counterbores
  • TR3T (TR75T/M): Three 8-32 (M4) Tapped Holes
  • Removable Double-Ended 8-32 (M4) Threaded Setscrew

These posts are designed for mounting optomechanical components in custom configurations. One end has a 1/4"-20 (M6) tapped hole, while the other end has a removable, double-ended 8-32 (M4) threaded setscrew [5/64" (2 mm) hex on both ends]. By using a combination of a tapped construction post along with a counterbored construction post, components can be mounted at an arbitrary angle to keep your beam path unobstructed (see image to the right).

The TR3C (TR75C/M) offers five #8 (M4) counterbores and a mounting flat while the TR3T (TR75T/M) offers three 8-32 (M4) tapped holes and a mounting flat. The posts can be combined by using an 8-32 (M4) cap screw. Additionally, a single post may be used to mount an optomechanical component on its side using the mounting flat on each post (see image to the right).

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
TR3T Support Documentation
TR3T Ø1/2" Optical Construction Post, SS, 8-32 Taps
$16.00
Today
TR3C Support Documentation
TR3C Ø1/2" Optical Construction Post, SS, #8 Counterbores
$16.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
TR75T/M Support Documentation
TR75T/M Ø12.7 mm Optical Construction Post, SS, M4 Taps
$16.00
Today
TR75C/M Support Documentation
TR75C/M Ø12.7 mm Optical Construction Post, SS, M4 Counterbores
$16.00
Today
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