Setscrews and Thumbscrews


  • Cup-Point, Double-Ended, Nylon-Tipped, Brass-Tipped, or Vented, Vacuum-Compatible Setscrews
  • Spring-Loaded or Vacuum-Compatible Thumbscrews
  • Imperial Sizes: 2-56, 4-40, 6-32, 8-32, and 1/4"-20
  • Metric Sizes: M3 x 0.5, M4 x 0.7, and M6 x 1.0

SS8N013

8-32 Nylon-Tipped Setscrew, 1/8" Long

SS6MS12

M6 x 1.0 Stainless Steel Setscrew, 12 mm Long

SS4B025

4-40 Brass Setscrew, 1/4" Long

SS25S075V

Vented, Vacuum-Compatible
1/4"-20 Setscrew, 3/4" Long

TS25HV

1/4"-20 Vacuum-Compatible
Thumbscrew

TS25H

1/4"-20 Spring-Loaded Thumbscrew

Vent Hole

SS4MB6

M4 x 0.7 Alloy Steel,
Brass-Tipped Setscrew,
6 mm Long

Related Items


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Features

  • Setscrews with a Variety of Features (See Tables Below for Details):
    • Imperial Threads: 2-56, 4-40, 6-32, 8-32, or 1/4"-20
    • Metric Threads: M3 x 0.5, M4 x 0.7, or M6 x 1.0
    • Stainless Steel, Brass, and Alloy Steel Options
    • Cup-Point, Double-Ended, Nylon-Tipped, or Brass-Tipped
  • Vented, Vacuum-Compatible Setscrews Also Available
    • Imperial Sizes: 8-32 or 1/4"-20
    • Metric Sizes: M4 x 0.7 or M6 x 1.0
  • Spring-Loaded or Vacuum-Compatible Thumbscrews
    • 1/4"-20 or M6 x 1.0-Threaded

Setscrews
Stainless steel and alloy steel setscrews are available below with a variety of industry-standard threads. In addition to standard cup-point setscrews, we offer versions with non-marring nylon or brass tips, as well as double-ended setscrews with hex sockets on both ends for easy removal from posts or mounts. For vacuum applications, vented setscrews are also available with 8-32, M4 x 0.7, 1/4"-20, or M6 x 1.0 threads. Details are provided in the tables below.

Thumbscrews
Our 1/4"-20 and M6 x 1.0 thumbscrews, with either a spring-loaded tip or a vacuum-compatible finish, are a direct replacement for the thumbscrews used on our Ø1/2" post holders. The versions with spring-loaded tips are offered both individually and in packs of five.


Posted Comments:
user  (posted 2024-03-13 09:23:27.643)
Hi, I have a KM100 kinematic mirror mount and i lost the tiny setscrew that blocks the mirror in place, the setscrew located at the diagonal corner. I looked at the AutoCAD PDF to find its specification and i think it's the "8-32 NYLON-TIPPED SETSCREW 5/64in [2.0mm] HEX" at the top left side of the CAD drawing. I have found several setscrews (SS8N013/SS8N019/SS8N038) that seem to be the one i'm looking for. But i did'nt find the correct length of the setscrew for my mirror mount anywhere so I don't know which setscrew to buy... Could you tell me which setscrew(s) work ?
jdelia  (posted 2024-03-13 10:46:32.0)
Thank you for contacting Thorlabs. The correct replacement locking set screw would be SS8N013, though a longer one should also work fine: https://www.thorlabs.com/thorproduct.cfm?partnumber=SS8N013
Ronald Portegies  (posted 2022-10-28 11:49:34.4)
Do you have these in 30 mm length of thread? What would be a quote for 1000 pieces?
cdolbashian  (posted 2022-10-31 02:10:34.0)
Thank you for contacting us Ronald. We potentially can do this for you as a custom. I have connected you with our custom team who may be able to fulfill this request.
user  (posted 2019-12-13 09:06:42.1)
Is there a part number for the nylon tipped M6 setscrew used in PMTR/M?
YLohia  (posted 2019-12-13 11:21:47.0)
Hello, the part number for the nylon-tipped M6 setscrew used in the PMTR/M is SS6MN8-1. This part can be offered as a special by emailing techsupport@thorlabs.com.
user  (posted 2019-07-25 14:23:06.89)
These should absolutely NOT be hollow. We CONSISTENTLY break them in our lab, tightening them with either an Allen key or by hand. You should not make a screw that is too delicate to be tightened.
llamb  (posted 2019-07-26 09:35:12.0)
Thank you for your feedback. The recommended maximum torque for the TS25H is 28 in·lbs (3.2 N·m). Please note that we do not recommend using an L wrench to tighten the thumbscrew, as this may break off the screw head. The hollow design allows for the spring-loaded retractable tip to be installed, which is often helpful in final positional adjustments of posts. I have reached out to you directly to discuss your application, in case alternative parts may be better suited for your torque/locking requirements.
TMORMILE  (posted 2018-03-21 09:07:15.477)
Good Morning, i'm looking for part number SS4S019 but nothing comes up when i search on your web site ? that number is called out on your part CP12 Tony Mormile
llamb  (posted 2018-03-22 08:53:56.0)
Hello, thank you for contacting Thorlabs. While we do not offer the SS4S019 as a standard part on our website, we can offer this as a special component item. Otherwise, you can also consider the stock SS4S025, which is 1/16" longer and can also be used in the CP12. I will reach out to you directly if you are interested in a special order of the SS4S019.
stepanenko  (posted 2016-02-03 09:47:44.303)
Metric nylon tipped M3 and M4 set screws would be great to have.
besembeson  (posted 2016-02-04 10:43:41.0)
Response from Bweh at Thorlabs USA: Thanks for your feedback. I will contact you regarding providing these as special items for now. We will also look into expanding our offerings for the nylon tipped set screws.
jim.jack  (posted 2014-06-26 15:27:32.553)
The drawing for the SS6N013 show an 8-32 thread but the description calls for a 6-32 thread. Can you clarify please.
myanakas  (posted 2014-06-30 05:00:19.0)
Response from Mike at Thorlabs: The 8-32 thread callout was an error in our PDF drawing. I apologize for any confusion this may have caused. Based on this feedback, the drawing has been corrected to show that the SS6N013 has a 6-32 thread. Thank you for taking the time to point out this error.
jack  (posted 2009-05-08 11:22:40.0)
Reply from Jack at Thorlabs: Yes, we can offer this in metric size. a quotation has been emailed to you.
loconnor  (posted 2009-05-07 09:44:46.0)
Hi, Do you provide these screws in metric sizes? Liam.
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2-56 Stainless Steel Setscrews

Nylon-Tipped Setscrew Length
Item # Length Type Hex Material Quantity
SS2SN013a 1/8" (3.2 mm)a Nylon Tip,
Approx. 1/32" Long
0.035" 18-8 Stainless Steel, Nylona 10
  • This setscrew has a nylon tip that extends beyond the end of the setscrew by approximately 1/32". Nylon-tipped setscrews can be used in place of standard setscrews to avoid marring or stressing optics or other mating parts.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SS2SN013 Support Documentation
SS2SN0132-56 Stainless Steel Nylon-Tipped Setscrew, 1/8" Long, 10 Pack
$13.18
Today
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4-40 Stainless Steel, Brass, or Alloy Steel Setscrews

Nylon-Tipped Setscrew Length
Item # Length Type Hex Material Quantity
SS4S025 1/4" (6.4 mm) Cup Point 0.050" 18-8 Stainless Steel 50
SS4B013 1/8" (3.2 mm) Cup Point 0.050" Brass 50
SS4B025 1/4" (6.4 mm) Cup Point 0.050" Brass 50
SS4B038 3/8" (9.5 mm) Cup Point 0.050" Brass 50
SS4N013a 1/8" (3.2 mm)a Nylon Tip,
Approx.1/32" Long
0.050" 18-8 Stainless Steel, Nylona 10
SS4N019a 3/16" (4.8 mm)a Nylon Tip,
Approx.1/32" Long
0.050" Grade 8 Alloy Steel with
Black Oxide Coating, Nylona
10
SS4N025a 1/4" (6.4 mm)a
  • This setscrew has a nylon tip that extends beyond the end of the setscrew by approximately 1/32". Nylon-tipped setscrews can be used in place of standard setscrews to avoid marring or stressing optics or other mating parts.

We also offer the HW-KIT5 4-40 stainless steel cap screw and setscrew kit.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SS4S025 Support Documentation
SS4S025Customer Inspired! 4-40 Stainless Steel Setscrew, 1/4" Long, 50 Pack
$11.23
Today
SS4B013 Support Documentation
SS4B0134-40 Brass Setscrew, 1/8" Long, 50 Pack
$28.90
Today
SS4B025 Support Documentation
SS4B0254-40 Brass Setscrew, 1/4" Long, 50 Pack
$31.45
Today
SS4B038 Support Documentation
SS4B0384-40 Brass Setscrew, 3/8" Long, 50 Pack
$18.70
Today
SS4N013 Support Documentation
SS4N0134-40 Stainless Steel Nylon-Tipped Setscrew, 1/8" Long, 10 Pack
$14.79
Today
SS4N019 Support Documentation
SS4N0194-40 Alloy Steel Nylon-Tipped Setscrew, 3/16" Long, 10 Pack
$15.43
Today
SS4N025 Support Documentation
SS4N0254-40 Alloy Steel Nylon-Tipped Setscrew, 1/4" Long, 10 Pack
$16.11
Today
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M3 x 0.5 Stainless Steel or Alloy Steel Setscrews

Nylon-Tipped Setscrew Length
Item # Length Type Hex Material Quantity
SS3M6 6 mm (0.24") Cup Point 1.5 mm 18-8 Stainless Steel 50
SS3MN3a 3 mm (0.12")a Nylon Tip,
Approx. 0.8 mm Long
1.5 mm Grade 8 Alloy Steel with
Black Oxide Coating, Nylona
10
SS3MN4a 4 mm (0.16")a
SS3MN6a 6 mm (0.24")a
  • This setscrew has a nylon tip that extends beyond the end of the setscrew by approximately 0.8 mm. Nylon-tipped setscrews can be used in place of standard setscrews to avoid marring or stressing optics or other mating parts.

We also offer the HW-KIT5/M M3 cap screw and setscrew kit. 

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Metric Price Available
SS3M6 Support Documentation
SS3M6Customer Inspired! M3 x 0.5 Stainless Steel Setscrew, 6 mm Long, 50 Pack
$11.23
Today
SS3MN3 Support Documentation
SS3MN3M3 x 0.5 Alloy Steel Nylon-Tipped Setscrew, 3 mm Long, 10 Pack
$14.79
Today
SS3MN4 Support Documentation
SS3MN4Customer Inspired! M3 x 0.5 Alloy Steel Nylon-Tipped Setscrew, 4 mm Long, 10 Pack
$15.43
Today
SS3MN6 Support Documentation
SS3MN6M3 x 0.5 Alloy Steel Nylon-Tipped Setscrew, 6 mm Long, 10 Pack
$16.11
Today
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6-32 Alloy Steel Setscrews

Nylon-Tipped Setscrew Length
Item # Length Type Hex Material Quantity
SS6N013a 1/8" (3.2 mm)a Nylon Tip,
Approx. 1/32" Long
1/16" Grade 8 Alloy Steel with
Black Oxide Coating, Nylona
10
  • This setscrew has a nylon tip that extends beyond the end of the setscrew by approximately 1/32". Nylon-tipped setscrews can be used in place of standard setscrews to avoid marring or stressing optics or other mating parts.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SS6N013 Support Documentation
SS6N0136-32 Alloy Steel Nylon-Tipped Setscrew, 1/8" Long, 10 Pack
$14.48
Today
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8-32 Stainless Steel or Alloy Steel Setscrews

Nylon-Tipped Setscrew Length
Item # Length Type Hex Material Quantity
SS8S013 1/8" (3.2 mm) Cup Point 5/64" 18-8 Stainless Steel 50
SS8S019 3/16" (4.8 mm)
SS8S025 1/4" (6.4 mm)
SS8S038 3/8" (9.5 mm)
SS8S050 1/2" (12.7 mm)
SS8S0625 5/8" (15.9 mm)
SS8S075 3/4" (19.1 mm)
SS8S100 1" (25.4 mm)
SS8E50D 1/2" (12.7 mm) Double-Ended 5/64" (Both Ends) 300 Series Stainless Steel 10
SS8N013a 1/8" (3.2 mm)a Nylon Tip,
Approx. 3/64" Long
5/64" 18-8 Stainless Steel, Nylona 10
SS8N019a 3/16" (4.8 mm)a
SS8N038a 3/8" (9.5 mm)a Nylon Tip,
Approx. 3/64" Long
5/64" Grade 8 Alloy Steel with
Black Oxide Coating, Nylona
10
SS8B025b 1/4" (6.4 mm)b Brass Tip,
Approx. 1/20" Long
5/64" Grade 8 Alloy Steel with
Black Oxide Coating, Brassb
10
  • This setscrew has a nylon tip that extends beyond the end of the setscrew by approximately 3/64". Nylon-tipped setscrews can be used in place of standard setscrews to avoid marring or stressing mating parts.
  • This setscrew has a brass tip that extends beyond the end of the setscrew by approximately 1/20". Brass-tipped setscrews can be used in place of standard setscrews to avoid marring or stressing mating parts.

We also offer the HW-KIT1 8-32 cap screw kit and HW-KIT3 8-32 setscrew kit.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SS8S013 Support Documentation
SS8S0138-32 Stainless Steel Setscrew, 1/8" Long, 50 Pack
$5.36
Today
SS8S019 Support Documentation
SS8S0198-32 Stainless Steel Setscrew, 3/16" Long, 50 Pack
$5.90
Today
SS8S025 Support Documentation
SS8S0258-32 Stainless Steel Setscrew, 1/4" Long, 50 Pack
$6.16
Today
SS8S038 Support Documentation
SS8S0388-32 Stainless Steel Setscrew, 3/8" Long, 50 Pack
$6.43
Today
SS8S050 Support Documentation
SS8S050Customer Inspired! 8-32 Stainless Steel Setscrew, 1/2" Long, 50 Pack
$6.70
Today
SS8S0625 Support Documentation
SS8S06258-32 Stainless Steel Setscrew, 5/8" Long, 50 Pack
$6.97
Today
SS8S075 Support Documentation
SS8S0758-32 Stainless Steel Setscrew, 3/4" Long, 50 Pack
$11.78
Today
SS8S100 Support Documentation
SS8S1008-32 Stainless Steel Setscrew, 1" Long, 50 Pack
$13.92
Today
SS8E50D Support Documentation
SS8E50D8-32 Stainless Steel Setscrew with Hex on Both Ends, 1/2" Long, 10 Pack
$10.92
Today
SS8N013 Support Documentation
SS8N0138-32 Stainless Steel Nylon-Tipped Setscrew, 1/8" Long, 10 Pack
$13.29
Today
SS8N019 Support Documentation
SS8N0198-32 Stainless Steel Nylon-Tipped Setscrew, 3/16" Long, 10 Pack
$13.45
Today
SS8N038 Support Documentation
SS8N0388-32 Alloy Steel Nylon-Tipped Setscrew, 3/8" Long, 10 Pack
$15.84
Today
SS8B025 Support Documentation
SS8B0258-32 Alloy Steel Brass-Tipped Setscrew, 1/4" Long, 10 Pack
$15.91
Today
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Vented, Vacuum-Compatible 8-32 Setscrews

Item # Length Type Hex Screw Material Quantity
SS8S050V 1/2" (12.7 mm) Vented 5/64" 316 Stainless Steel 5

These setscrews are constructed from 316 stainless steel and chemically cleaned and prepared for vacuum applications before packaging. They also have a central Ø0.04" (Ø1.1 mm) hole through the body of the screw to serve as a vent, allowing trapped gas to escape from a blind hole when a vacuum chamber is pumped down.

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. The material properties of the 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.

These setscrews are packaged in double airtight bags for cleanroom and vacuum chamber applications. We also offer additional vacuum-compatible screws.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SS8S050V Support Documentation
SS8S050V8-32 Vacuum-Compatible Vented Setscrew, 316 Stainless Steel, 1/2" Long, 5 Pack
$13.18
Today
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M4 x 0.7 Stainless Steel or Alloy Steel Setscrews

Nylon-Tipped Setscrew Length
Item # Length Type Hex Material Quantity
SS4MS4 4 mm (0.16") Cup Point 2 mm 18-8 Stainless Steel 50
SS4MS5a 5 mm (0.20")
SS4MS6 6 mm (0.24")
SS4MS10 10 mm (0.39")
SS4MS12 12 mm (0.47")
SS4MS16 16 mm (0.63")
SS4MS20 20 mm (0.79")
SS4MS25 25 mm (0.98")
SS4M12D 12 mm (0.47") Double Ended 2 mm (Both Ends) 300 Series Stainless Steel 10
SS4MN4b 4 mm (0.16")b Nylon Tip,
Approx. 1.2 mm Long
2 mm Grade 8 Alloy Steel with
Black Oxide Coating, Nylonb
10
SS4MN6b 6 mm (0.24")b
SS4MN10b 10 mm (0.39")b
SS4MB6c 6 mm (0.24")c Brass Tip,
Approx. 1.2 mm Long
2 mm Grade 8 Alloy Steel with
Black Oxide Coating, Brassc
10
  • The SS4MS5 setscrew is used in our 30 mm Cage Plates with 5/64" (2.0 mm) hex setscrew locking mechanisms.
  • This setscrew has a nylon tip that extends beyond the end of the setscrew by approximately 1.2 mm. Nylon-tipped setscrews can be used in place of standard setscrews to avoid marring or stressing optics or other mating parts.
  • This setscrew has a brass tip that extends beyond the end of the setscrew by approximately 1.2 mm. Brass-tipped setscrews can be used in place of standard setscrews to avoid marring or stressing optics or other mating parts.

We also offer the HW-KIT1/M M4 cap screw kit and HW-KIT3/M M4 setscrew kit.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Metric Price Available
SS4MS4 Support Documentation
SS4MS4M4 x 0.7 Stainless Steel Setscrew, 4 mm Long, 50 Pack
$5.36
Today
SS4MS5 Support Documentation
SS4MS5M4 x 0.7 Stainless Steel Setscrew, 5 mm Long, 50 Pack
$5.90
Today
SS4MS6 Support Documentation
SS4MS6M4 x 0.7 Stainless Steel Setscrew, 6 mm Long, 50 Pack
$6.16
Today
SS4MS10 Support Documentation
SS4MS10M4 x 0.7 Stainless Steel Setscrew, 10 mm Long, 50 Pack
$6.43
Today
SS4MS12 Support Documentation
SS4MS12Customer Inspired! M4 x 0.7 Stainless Steel Setscrew, 12 mm Long, 50 Pack
$6.77
Today
SS4MS16 Support Documentation
SS4MS16M4 x 0.7 Stainless Steel Setscrew, 16 mm Long, 50 Pack
$6.97
Today
SS4MS20 Support Documentation
SS4MS20M4 x 0.7 Stainless Steel Setscrew, 20 mm Long, 50 Pack
$11.78
Today
SS4MS25 Support Documentation
SS4MS25M4 x 0.7 Stainless Steel Setscrew, 25 mm Long, 50 Pack
$13.92
Today
SS4M12D Support Documentation
SS4M12DM4 x 0.7 Stainless Steel Setscrew with Hex on Both Ends, 12 mm Long, 10 Pack
$11.04
Today
SS4MN4 Support Documentation
SS4MN4Customer Inspired! M4 x 0.7 Alloy Steel Nylon-Tipped Setscrew, 4 mm Long, 10 Pack
$13.45
Today
SS4MN6 Support Documentation
SS4MN6M4 x 0.7 Alloy Steel Nylon-Tipped Setscrew, 6 mm Long, 10 Pack
$14.04
Today
SS4MN10 Support Documentation
SS4MN10M4 x 0.7 Alloy Steel Nylon-Tipped Setscrew, 10 mm Long, 10 Pack
$15.84
Today
SS4MB6 Support Documentation
SS4MB6M4 x 0.7 Alloy Steel Brass-Tipped Setscrew, 6 mm Long, 10 Pack
$15.91
Today
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Vented, Vacuum-Compatible M4 x 0.7 Setscrews

Item # Length Type Hex Material Quantity
SS4MS12V 12 mm (0.47") Vented 2 mm A4 Stainless Steel 5

These setscrews are constructed from A4 stainless steel and chemically cleaned and prepared for vacuum applications before packaging. They also have a central Ø1.2 mm (Ø0.05”) hole through the body of the screw to serve as a vent, allowing trapped gas to escape from a blind hole when a vacuum chamber is pumped down.

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. The material properties of the 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.

These setscrews are packaged in double airtight bags for cleanroom and vacuum chamber applications. We also offer additional vacuum-compatible screws.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Metric Price Available
SS4MS12V Support Documentation
SS4MS12VM4 x 0.7 Vacuum-Compatible Vented Setscrew, A4 Stainless Steel, 12 mm Long, 5 Pack
$13.18
Today
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1/4"-20 Stainless Steel Setscrews

Nylon-Tipped Setscrew Length
Item # Length Type Hex Material Quantity
SS25S0250 1/4" (6.4 mm) Cup Point 1/8" 18-8 Stainless Steel 25
SS25S0375 3/8" (9.5 mm)
SS25S050 1/2" (12.7 mm)
SS25S0625 5/8" (15.9 mm)
SS25S075 3/4" (19.1 mm)
SS25S10 1" (25.4 mm)
SS25E63D 5/8" (15.9 mm) Double Ended 1/8" (Both Ends) 18-8 Stainless Steel 10
SS25N031a 5/16" (7.9 mm)a Nylon Tip,
Approx. 5/64" Long 
1/8" 18-8 Stainless Steel, Nylona 10
  • This setscrew has a nylon tip that extends beyond the end of the setscrew by approximately 5/64". Nylon-tipped setscrews can be used in place of standard setscrews to avoid marring or stressing optics or other mating parts.

We also offer the HW-KIT2 1/4"-20 cap screw and setscrew kit and the HW-KIT4 1/4"-20 setscrew kit.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SS25S0250 Support Documentation
SS25S02501/4"-20 Stainless Steel Setscrew, 1/4" Long, 25 Pack
$6.16
Today
SS25S0375 Support Documentation
SS25S03751/4"-20 Stainless Steel Setscrew, 3/8" Long, 25 Pack
$6.43
Today
SS25S050 Support Documentation
SS25S050Customer Inspired! 1/4"-20 Stainless Steel Setscrew, 1/2" Long, 25 Pack
$6.70
Today
SS25S0625 Support Documentation
SS25S06251/4"-20 Stainless Steel Setscrew, 5/8" Long, 25 Pack
$6.97
Today
SS25S075 Support Documentation
SS25S075Customer Inspired! 1/4"-20 Stainless Steel Setscrew, 3/4" Long, 25 Pack
$7.61
Today
SS25S10 Support Documentation
SS25S101/4"-20 Stainless Steel Setscrew, 1" Long, 25 Pack
$9.66
Today
SS25E63D Support Documentation
SS25E63D1/4"-20 Stainless Steel Setscrew with Hex on Both Ends, 5/8" Long, 10 Pack
$13.44
Today
SS25N031 Support Documentation
SS25N0311/4"-20 Stainless Steel Nylon-Tipped Setscrew, 5/16" Long, 10 Pack
$16.47
Today
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Vented, Vacuum-Compatible 1/4"-20 Setscrews

Item # Length Type Hex Material Quantity
SS25S050V 1/2" (12.7 mm) Vented 1/8" 316 Stainless Steel 5
SS25S075V 3/4" (19.1 mm)

These setscrews are constructed from 316 stainless steel and chemically cleaned and prepared for vacuum applications before packaging. They also have a central Ø0.0625" (Ø1.6 mm) hole through the body of the screw to serve as a vent, allowing trapped gas to escape from a blind hole when a vacuum chamber is pumped down.

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. The material properties of the 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.

These setscrews are packaged in double airtight bags for cleanroom and vacuum chamber applications. We also offer additional vacuum-compatible screws.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SS25S050V Support Documentation
SS25S050V1/4"-20 Vacuum-Compatible Vented Setscrew, 316 Stainless Steel, 1/2" Long, 5 Pack
$13.57
Today
SS25S075V Support Documentation
SS25S075V1/4"-20 Vacuum-Compatible Vented Setscrew, 316 Stainless Steel, 3/4" Long, 5 Pack
$14.14
Today
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M6 x 1.0 Stainless Steel or Alloy Steel Setscrews

Nylon-Tipped Setscrew Length
Item # Length Type Hex Material Quantity
SS6MS6 6 mm (0.24") Cup Point 3 mm 18-8 Stainless Steel 25
SS6MS10 10 mm (0.39")
SS6MS12 12 mm (0.47")
SS6MS16 16 mm (0.63")
SS6MS20 20 mm (0.79")
SS6MS25 25 mm (0.98")
SS6M16D 16 mm (0.63") Double Ended 3 mm (Both Ends) 18-8 Stainless Steel 10
SS6MN8a 8.0 mm (0.38")a Nylon Tip,
Approx. 1.6 mm Long
3 mm Grade 8 Alloy Steel with
Black Oxide Coating, Nylona
10
  • This setscrew has a nylon tip that extends beyond the end of the setscrew by approximately 1.6 mm. Nylon-tipped setscrews can be used in place of standard setscrews to avoid marring or stressing optics or other mating parts.

We also offer the HW-KIT2/M M6 cap screw kit and HW-KIT4/M M6 setscrew kit.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Metric Price Available
SS6MS6 Support Documentation
SS6MS6M6 x 1.0 Stainless Steel Setscrew, 6 mm Long, 25 Pack
$6.16
Today
SS6MS10 Support Documentation
SS6MS10M6 x 1.0 Stainless Steel Setscrew, 10 mm Long, 25 Pack
$6.43
Today
SS6MS12 Support Documentation
SS6MS12Customer Inspired! M6 x 1.0 Stainless Steel Setscrew, 12 mm Long, 25 Pack
$6.70
Today
SS6MS16 Support Documentation
SS6MS16M6 x 1.0 Stainless Steel Setscrew, 16 mm Long, 25 Pack
$6.97
Today
SS6MS20 Support Documentation
SS6MS20Customer Inspired! M6 x 1.0 Stainless Steel Setscrew, 20 mm Long, 25 Pack
$7.61
Today
SS6MS25 Support Documentation
SS6MS25M6 x 1.0 Stainless Steel Setscrew, 25 mm Long, 25 Pack
$9.57
Today
SS6M16D Support Documentation
SS6M16DM6 x 1.0 Stainless Steel Setscrew with Hex on Both Ends, 16 mm Long, 10 Pack
$13.44
Today
SS6MN8 Support Documentation
SS6MN8M6 x 1.0 Alloy Steel Nylon-Tipped Setscrew, 8 mm Long, 10 Pack
$18.12
Today
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Vented, Vacuum-Compatible M6 x 1.0 Setscrews

Item # Length Type Hex Material Quantity
SS6MS12V 12 mm (0.47") Vented 3 mm A4 Stainless Steel 5
SS6MS20V 20 mm (0.79")

These setscrews are constructed from A4 stainless steel and chemically cleaned and prepared for vacuum applications before packaging. They also have a central Ø1.6 mm (Ø0.0625") hole through the body of the screw to serve as a vent, allowing trapped gas to escape from a blind hole when a vacuum chamber is pumped down.

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. The material properties of the 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.

These setscrews are packaged in double airtight bags for cleanroom and vacuum chamber applications. We also offer additional vacuum-compatible screws.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Metric Price Available
SS6MS12V Support Documentation
SS6MS12VM6 x 1.0 Vacuum-Compatible Vented Setscrew, A4 Stainless Steel, 12 mm Long, 5 Pack
$13.57
Today
SS6MS20V Support Documentation
SS6MS20VM6 x 1.0 Vacuum-Compatible Vented Setscrew, A4 Stainless Steel, 20 mm Long, 5 Pack
$14.14
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Spring-Loaded 1/4"-20 and M6 x 1.0 Thumbscrews for Post Holders

Specification
Maximum Torquea 28 in·lbs (3.2 N·m)
  • Please note that we do not recommend using an L wrench to tighten the thumbscrew, as this may break off the screw head.

Click to Enlarge

Exploded View of the TS25H Thumbscrew
TS25H Mechanical Drawing
TS25H Drawing

These hex-locking, anodized aluminum thumbscrews have spring-loaded, completely retractable Delrin®* tips that provide sufficient force on a post to hold it in place as final positional adjustments are being made. They can then be locked into place using a 3/16" (for the TS25H) or 5 mm (for the TS6H/M) balldriver to prevent any further movement of the post. The hex size is also engraved on the face of the thumbscrew, thereby enabling easy identification in the lab.

The TS25H has 1/4"-20 threads while the TS6H/M has M6 x 1.0 threads for compatibility with our imperial and metric Ø1/2" post holders, respectively. The recommended maximum torque is 28 in·lbs (3.2 N·m). Please note that we do not recommend using an L wrench to tighten the thumbscrew, as this may break off the screw head.

If a thumbscrew without a spring-loaded tip is preferred, we recommend our vacuum-compatible thumbscrews, sold below. Alternatively, the tips can be removed from these thumbscrews by unthreading the setscrew in the front of the thumbscrew with a 1/16" (1.5 mm) balldriver. The spring and tip can then be removed from the thumbscrew, in the order shown in the image to the right. However, the resulting contact face of the thumbscrew will have a center hole, unlike the contact face of our vacuum-compatible thumbscrews.

For ease of ordering, these thumbscrews are available individually or in packages of five.

*Delrin® is a registered trademark of DuPont Polymers, Inc.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
TS25H Support Documentation
TS25HSpring-Loaded 3/16" Hex-Locking Thumbscrew, 1/4"-20 Thread
$2.93
Today
TS25H-P5 Support Documentation
TS25H-P5Spring-Loaded 3/16" Hex-Locking Thumbscrew, 1/4"-20 Thread, 5 Pack
$13.87
Today
+1 Qty Docs Part Number - Metric Price Available
TS6H/M Support Documentation
TS6H/MSpring-Loaded 5 mm Hex-Locking Thumbscrew, M6 x 1.0 Thread
$2.93
Today
TS6H/M-P5 Support Documentation
TS6H/M-P5Spring-Loaded 5 mm Hex-Locking Thumbscrew, M6 x 1.0 Thread, 5 Pack
$13.87
Today
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Vacuum-Compatible 1/4"-20 and M6 x 1.0 Thumbscrews for Post Holders

Specifications
Vacuum Compatibility
as Packageda
>10-6 Torr
Materials2024-T3 Aluminum
Preparation and PackagingChemically Cleaned and Double Vacuum Bagged
Aluminum Outgassing Rate7.6 x 10-9 Torr-Liters/s/cm2
Maximum Torqueb28 in·lbs (3.2 N·m)
  • 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.
  • Please note that we do not recommend using an L wrench to tighten the thumbscrew, as this may break off the screw head.
TS25HV Mechanical Drawing
TS25HV Drawing

These hex-locking thumbscrews are constructed from 2024-T3 aluminum and 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 aluminum, which is 7.6 x 10-9 Torr-Liters/s/cm2. The material properties of the 2024-T3 aluminum 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.

These unanodized thumbscrews are packaged in double airtight bags for cleanroom and vacuum chamber applications.

The thumbscrews may be adjusted using our selection of balldrivers. The TS25HV has 1/4"-20 threads while the TS6HV/M has M6 x 1.0 threads for compatibility with our imperial or metric Vacuum-Compatible Ø1/2" Post Holders, respectively. 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 - Imperial Price Available
TS25HV Support Documentation
TS25HV3/16" Hex-Locking Thumbscrew, 1/4"-20 Thread, Vacuum Compatible
$14.85
Today
+1 Qty Docs Part Number - Metric Price Available
TS6HV/M Support Documentation
TS6HV/M5 mm Hex-Locking Thumbscrew, M6 x 1.0 Thread, Vacuum Compatible
$14.85
7-10 Days