Products HomeSetscrews 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
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| Cap Screws & Nuts |
| Setscrews and Thumbscrews |
| Low-Profile Screws & T-Nuts |
| Thread Adapter Screws |
| Screw Kits |
| Balldrivers and Hex Keys |
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.
| Setscrew and Thumbscrew Quick Links | ||||||||
|---|---|---|---|---|---|---|---|---|
| Thread |
2-56 | 4-40 | 6-32 | 8-32 | 1/4"-20 | M3 x 0.5 | M4 x 0.7 | M6 x 1.0 |
| Setscrew Type | Nylon Tipped | Cup Point or Nylon Tipped |
Nylon Tipped | Cup Point, Double Ended, Nylon Tipped, Brass Tipped, or Vacuum Compatible |
Cup Point, Double Ended, Nylon Tipped, or Vacuum Compatible |
Cup Point or Nylon Tipped |
Cup Point, Double Ended, Nylon Tipped, Brass Tipped, or Vacuum Compatible |
Cup Point, Double Ended, Nylon Tipped, or Vacuum Compatible |
| Thumbscrew Type | - | - | - | - | Spring Loaded or Vacuum Compatible |
- | - | Spring Loaded or Vacuum Compatible |
| 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. |
Zoom
| 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 |
Zoom| 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 |
Zoom| 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 |
Zoom| 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 |
Zoom| 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 |
Zoom| 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. 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.
Zoom| 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 |
Zoom| 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. 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.
Zoom| 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 |
Zoom| 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. 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.
Zoom| 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 |
Zoom| 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. 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.
Zoom| Specification | |
|---|---|
| Maximum Torquea | 28 in·lbs (3.2 N·m) |
Click to Enlarge
Exploded View of the TS25H Thumbscrew
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.
Zoom| Specifications | |
|---|---|
| Vacuum Compatibility as Packageda |
>10-6 Torr |
| Materials | 2024-T3 Aluminum |
| Preparation and Packaging | Chemically Cleaned and Double Vacuum Bagged |
| Maximum Torqueb | 28 in·lbs (3.2 N·m) |
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. 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.
Setscrews and Thumbscrews