Products Home / Lab Supplies / Screws, Kits, and Adapters / Cap Screw, Setscrew, and Screw Thread Adapter KitsCap Screw, Setscrew, and Screw Thread Adapter Kits
- Essential Hardware for Any Lab Setup
- A Variety of Screws in a Single Kit
- Well Organized Package Reduces Setup Time
HW-KIT2
1/4"-20 Cap Screw Kit
HW-KIT3
8-32 Setscrew Kit
HW-KIT5
4-40
Cap Screw Kit
HW-KIT4/M
M6 x 1.0 Setscrew Kit
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| Thread Adapter Screws |
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Features
- Cap Screws, Setscrews, Washers, Nuts, and Hex Keys in Many Popular Sizes
- 4-40, M3 x 0.5, 8-32, M4 x 0.7, 1/4"-20, and M6 x 1.0 Kits Available
- Individual Cap Screws, Setscrews, Washers, and Nuts are Also Available
- Screw Thread Adapter Kit Contains Our Most Popular Adapters
Thorlabs' cap screw and setscrew kits are an essential part of any lab setup, especially when using optomechanical hardware. They provide a generous assortment of precisely machined screws, washers and nuts of different sizes within a conveniently organized storage box. Also available are screw kits specifically designed for use with our Mini-Series Construction Components. Screw kits are available in imperial or metric versions.
We also offer many of the cap screws, nuts, and setscrews used in these kits in packages of 25 or 50, which are useful for refilling the more frequently used kit components. Click on the links in the tables below to see the corresponding package of 25 or 50 screws.
Thread Adapter Kits are available in both imperial and metric varieties. Both kits come packaged in an organizing box with convenient scaled drawing labels and contain our most popular thread adapters. See below for a list of the specific adapters contained in each kit.
| Posted Comments: | |
Chad Brubaker
(posted 2024-04-22 15:09:05.237) I'd highly recommend sourcing some Captive Panel Screws (https://www.mcmaster.com/captive-bolts/socket-head-captive-panel-screws/thread-size~1-4-20/) to increase mounting options for various elements. cdolbashian
(posted 2024-04-26 02:02:47.0) Thank you for the feedback Chad! Zachary Pagel
(posted 2020-02-07 14:13:46.043) What is the material of these screws? It would be helpful to include this on the website. YLohia
(posted 2020-02-07 03:15:15.0) Thank you for your feedback. The screws in the HW-KIT2 are made of 18-8 Stainless Steel (this information is given in the individual screw pages: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=5894). We will work on making this information more visible on the kit pages. Anastasia pienkina
(posted 2019-03-20 06:58:09.033) Hello,
Do you have screws M2.5, M2, M1.6?
Kind regards llamb
(posted 2019-03-20 02:23:52.0) Thank you for your feedback. We do not have these hardware screw threads in our standard catalog, but we may be able to offer them as custom or component parts. This will depend on screw type, material, length, and quantities. I will reach out to you directly to discuss your needs further. sara.vidal
(posted 2018-05-23 17:29:34.783) Hello. We are looking for a screw adapter from 4-40 to M4, as the cage bars have 4-40 screws and the rest of our system is metric. Do you have something like this? or do you have any advice to have this conversion? Thanks llamb
(posted 2018-06-04 09:57:45.0) Hello, thank you for contacting Thorlabs. We do not have a #4-40 to M4 screw thread adapter unfortunately. Our part number AE4E6M adapts from #4-40 to M6, if that might help for your application. Also, you can consider using our metric Mini Series Optical Posts (part number MS1R/M for example). They have the same Ø6 mm diameter as the 30mm/60mm cage rods, and feature M3 tapped ends. Typically our cage components will all feature #4-40 holes for cage rods, even if a metric product, so in case these alternatives won't work I will reach out to you directly to discuss your setup further. user
(posted 2016-05-23 14:07:40.507) What is the material of these screws? Is it magnetic? besembeson
(posted 2016-05-24 04:26:06.0) Response from Bweh at Thorlabs USA: These are made from 18-8 stainless steel and are generally non-magnetic. rossmr
(posted 2015-10-14 09:29:52.46) I think the large label on the front of the box should have the background color changed to match the ball drivers (yellow - imperial, red - metric). We use both and the boxes are easily mistaken fro one another in dimly lit labs while we align stuff. It also wouldn't hurt to have a similar distinguishing color on the inside so it is clear at a glance which box is which while open. besembeson
(posted 2015-10-15 09:48:40.0) Response from Bweh at Thorlabs USA: Thanks for the feedback. We will review this suggestion. tjd
(posted 2013-06-17 17:46:21.18) In the image at the top of the page, the HW-KIT2 is listed as: 1/2"-20 Cap Screw Kit, when in fact it is a 1/4"-20 Cap Screw Kit.
Thanks!
Tom sharrell
(posted 2013-06-18 09:19:00.0) Response from Sean at Thorlabs: Thank you for pointing out the error, we have corrected the caption. jlow
(posted 2012-09-26 16:12:00.0) Response from Jeremy at Thorlabs: Thank you very much for your feedback. I will post this idea into our internal forum and we will look into the possibility of adding this. asgerk
(posted 2012-09-20 15:18:28.0) Please make a kit that contain screws with all the most common types of "inch" threads. It is not necessary with any tools, you sell separate tool kits already. I am sure a lot of European labs would appreciate such a product. Tyler
(posted 2009-01-26 09:00:16.0) A response from Tyler at Thorlabs to melsscal: All of our balldriver sets contain the balldrivers needed for M4, M6, and M3. We have several options depending on your need. If you follow the Balldriver link near the top of the page, it will take you to a webpage with three options: TC3/M, BT17/M, and TC4/M. melsscal
(posted 2009-01-17 09:04:03.0) Can u suggest suitable part no. for the Tools(SCREW DRIVERS/BALL DRIVERS) which are required to be used with complete metric CAP SCREW KIT (M4,M6,M3)? |
Zoom
| HW-KIT5 4-40 Hardware Kit | |||
|---|---|---|---|
| Item | Approx. Qty. |
Item | Approx. Qty. |
| 4-40 SS* Cap Screw, Thread Length: 3/16" (SH4S019) | 165 | 4-40 SS* Nut | 200 |
| 4-40 SS* Cap Screw, Thread Length: 1/4" (SH4S025) | 135 | #4 SS* Washer, Outer Diameter: 0.313" | 350 |
| 4-40 SS* Cap Screw, Thread Length: 5/16" (SH4S031) | 135 | 3/32" Hex Key for 4-40 Cap Screws | 10 |
| 4-40 SS* Cap Screw, Thread Length: 3/8" (SH4S038) | 125 | 0.050" Hex Key for 4-40 Setscrews (HK050) | 10 |
| 4-40 SS* Setscrew, 1/4" Long (SS4S025) | 190 | - | - |
*Stainless Steel
Zoom| HW-KIT5/M M3 x 0.5 Hardware Kit | |||
|---|---|---|---|
| Item | Approx. Qty. |
Item | Approx. Qty. |
| M3 x 0.5 SS* Cap Screw, Thread Length: 5 mm (SH3M5) |
165 | M3 x 0.5 SS* Nut | 220 |
| M3 x 0.5 Alloy Steel Cap Screw, Thread Length: 6 mm (SH3M06) |
150 | M3 SS* Washer, Outer Diameter: 6.8 mm | 220 |
| M3 x 0.5 Alloy Steel Cap Screw, Thread Length: 8 mm (SH3M8) |
125 | 2.5 mm Hex Key for M3 Cap Screws | 10 |
| M3 x 0.5 Alloy Steel Cap Screw, Thread Length: 10 mm (SH3M10) |
125 | 1.5 mm Hex Key for M3 Setscrews | 10 |
| M3 x 0.5 SS* Setscrew, 6 mm Long (SS3M6) | 195 | - | - |
*Stainless Steel
Zoom
| HW-KIT1 8-32 Cap Screw and Hardware Kit | |||
|---|---|---|---|
| Item | Approx. Qty. |
Item | Approx. Qty. |
| 8-32 SS* Cap Screw, Thread Length: 1/4" (SH8S025) | 100 | 8-32 SS* Cap Screw, Thread Length: 1 1/4" (SH8S1250) |
21 |
| 8-32 SS* Cap Screw, Thread Length: 3/8" (SH8S038) | 70 | 8-32 SS* Cap Screw, Thread Length: 1 1/2" (SH8S15) | 33 |
| 8-32 SS* Cap Screw, Thread Length: 1/2" (SH8S050) | 55 | 8-32 SS* Nut (N8S0340) | 125 |
| 8-32 SS* Cap Screw, Thread Length: 3/4" (SH8S075) | 38 | #8 SS* Washer, Outer Diameter: 0.375" (W8S038) | 260 |
| 8-32 SS* Cap Screw, Thread Length: 1" (SH8S100) | 35 | - | - |
| HW-KIT3 8-32 Setscrew and Hardware Kit | |||
|---|---|---|---|
| Item | Approx. Qty. |
Item | Approx. Qty. |
| 8-32 SS* Setscrew, 1/8" Long (SS8S013) | 495 | 8-32 SS* Setscrew, 5/8" Long (SS8S0625) | 53 |
| 8-32 SS* Setscrew, 3/16" Long (SS8S019) | 330 | 8-32 SS* Setscrew, 3/4" Long (SS8S075) | 66 |
| 8-32 SS* Setscrew, 1/4" Long (SS8S025) | 275 | 8-32 SS* Setscrew, 1" Long (SS8S100) | 44 |
| 8-32 SS* Setscrew, 3/8" Long (SS8S038) | 180 | 5/64" Hex Key for 8-32 Setscrews (564HK) | 10 |
| 8-32 SS* Setscrew, 1/2" Long (SS8S050) | 110 | - | - |
*Stainless Steel
Zoom| HW-KIT1/M M4 x 0.7 Cap Screw and Hardware Kit | |||
|---|---|---|---|
| Item | Approx. Qty. |
Item | Approx. Qty. |
| M4 x 0.7 SS* Cap Screw, Thread Length: 6 mm (SH4MS06) |
80 | M4 x 0.7 SS* Cap Screw, Thread Length: 30 mm (SH4MS30) |
22 |
| M4 x 0.7 SS* Cap Screw, Thread Length: 10 mm (SH4MS10) |
60 | M4 x 0.7 SS* Cap Screw, Thread Length: 40 mm (SH4MS40) | 25 |
| M4 x 0.7 SS* Cap Screw, Thread Length: 12 mm (SH4MS12) |
45 | M4 x 0.7 SS* Nut (N4MS07) | 95 |
| M4 x 0.7 SS* Cap Screw, Thread Length: 20 mm (SH4MS20) |
30 | M4 SS* Washer, Outer Diameter: 0.375" (W8S038) |
250 |
| M4 x 0.7 SS* Cap Screw, Thread Length: 25 mm (SH4MS25) |
28 | - | - |
| HW-KIT3/M M4 x 0.7 Setscrew and Hardware Kit | |||
|---|---|---|---|
| Item | Approx. Qty. |
Item | Approx. Qty. |
| M4 x 0.7 SS* Setscrew, 4 mm Long (SS4MS4) | 495 | M4 x 0.7 SS* Setscrew, 16 mm Long (SS4MS16) | 100 |
| M4 x 0.7 SS* Setscrew, 5 mm Long (SS4MS5) | 330 | M4 x 0.7 SS* Setscrew, 20 mm Long (SS4MS20) | 55 |
| M4 x 0.7 SS* Setscrew, 6 mm Long (SS4MS6) | 330 | M4 x 0.7 SS* Setscrew, 25 mm Long (SS4MS25) | 55 |
| M4 x 0.7 SS* Setscrew, 10 mm Long (SS4MS10) | 185 | 2 mm Hex Key for M4 Setscrews | 10 |
| M4 x 0.7 SS* Setscrew, 12 mm Long (SS4MS12) | 165 | - | - |
*Stainless Steel
Zoom| HW-KIT2 1/4"-20 Cap Screw and Hardware Kit | |||
|---|---|---|---|
| Item | Qty. | Item | Qty. |
| 1/4"-20 SS* Cap Screw, Thread Length: 3/8" (SH25S038) | 65 | 1/4"-20 SS* Cap Screw, Thread Length: 2" (SH25S200) | 35 |
| 1/4"-20 SS* Cap Screw, Thread Length: 5/8" (SH25S063) | 95 | 8-32 SS* Setscrew, 1/2" (SS8S050) | 220 |
| 1/4"-20 SS* Cap Screw, Thread Length: 3/4" (SH25S075) | 83 | 1/4"-20 SS* Setscrew, 1/2" Long (SS25S050) | 120 |
| 1/4"-20 SS* Cap Screw, Thread Length: 1" (SH25S100) | 66 | 1/4"-20 SS* Setscrew, 3/4" Long (SS25S075) | 83 |
| 1/4"-20 SS* Cap Screw, Thread Length: 1 1/4" (SH25S1250) | 52 | 1/4"-20 SS* Nut (N25S0440) | 80 |
| 1/4"-20 SS* Cap Screw, Thread Length: 1 1/2" (SH25S15) | 46 | 1/4" SS* Washer, Outer Diameter: 0.500" (W25S050) | 220 |
| HW-KIT4 1/4"-20 Setscrew and Hardware Kit | |||
|---|---|---|---|
| Item | Approx. Qty. |
Item | Approx. Qty. |
| 1/4"-20 SS* Setscrew, 1/4" Long (SS25S0250) | 120 | 1/4"-20 SS* Setscrew, 1" Long (SS25S10) | 26 |
| 1/4"-20 SS* Setscrew, 3/8" Long (SS25S0375) | 90 | 1/4"-20 SS* Setscrew, 1 1/4" Long | 27 |
| 1/4"-20 SS* Setscrew, 1/2" Long (SS25S050) | 60 | 1/4"-20 SS* Setscrew, 1 1/2" Long | 27 |
| 1/4"-20 SS* Setscrew, 5/8" Long (SS25S0625) | 50 | 1/8" Hex Key for 1/4"-20 Setscrews | 20 |
| 1/4"-20 SS* Setscrew, 3/4" Long (SS25S075) | 35 | - | - |
*Stainless Steel
Zoom| HW-KIT2/M M6 x 1.0 Cap Screw and Hardware Kit | |||
|---|---|---|---|
| Item | Qty. | Item | Qty. |
| M6 x 1.0 SS* Cap Screw, Thread Length: 10 mm (SH6MS10) |
60 | M6 x 1.0 SS* Cap Screw, Thread Length: 35 mm (SH6MS35) | 50 |
| M6 x 1.0 SS* Cap Screw, Thread Length: 12 mm (SH6MS12) |
55 | M6 x 1.0 SS* Cap Screw, Thread Length: 45 mm (SH6MS45) | 43 |
| M6 x 1.0 SS* Cap Screw, Thread Length: 16 mm (SH6MS16) |
87 | M6 x 1.0 SS* Setscrew, Thread Length: 12 mm (SS6MS12) |
150 |
| M6 x 1.0 SS* Cap Screw, Thread Length: 20 mm (SH6MS20) |
75 | M6 x 1.0 SS* Setscrew, Thread Length: 20 mm (SS6MS20) |
65 |
| M6 x 1.0 SS* Cap Screw, Thread Length: 25 mm (SH6MS25) |
62 | M6 x 1.0 SS* Nut (N6MS010) | 120 |
| M6 x 1.0 SS* Cap Screw, Thread Length: 30 mm (SH6MS30) | 51 | M6 SS* Washer, Outer Diameter: 0.500" (W25S050) | 220 |
| HW-KIT4/M M6 x 1.0 Setscrew and Hardware Kit | |||
|---|---|---|---|
| Item | Qty. | Item | Qty. |
| M6 x 1.0 SS* Setscrew, 6 mm Long (SS6MS6) | 140 | M6 x 1.0 SS* Setscrew, 25 mm Long (SS6MS25) | 34 |
| M6 x 1.0 SS* Setscrew, 10 mm Long (SS6MS10) | 86 | M6 x 1.0 SS* Setscrew, 30 mm Long | 33 |
| M6 x 1.0 SS* Setscrew, 12 mm Long (SS6MS12) | 66 | M6 x 1.0 SS* Setscrew, 35 mm Long | 28 |
| M6 x 1.0 SS* Setscrew, 16 mm Long (SS6MS16) | 46 | 3 mm Hex Key for M6 Setscrews | 10 |
| M6 x 1.0 SS* Setscrew, 20 mm Long (SS6MS20) | 35 | - | - |
*Stainless Steel
Zoom
| HW-KIT6 Imperial Thread Adapter Kit | |||
|---|---|---|---|
| Item | Qty. | Item | Qty. |
| SS* External 8-32 and External 1/4"-20 (AP8E25E) | 5 | SS* External 8-32 and External M4 x 0.7 (AP8E4M) | 5 |
| SS* Internal 8-32 and External 1/4"-20 (AS8E25E) | 5 | SS* External 8-32 and External 4-40 (AP8E4E) | 5 |
| SS* External M6 x 1.0 and External 1/4"-20 (AP25E6M) | 5 | SS* External 8-32 and Internal 1/4"-20 (AS25E8E) | 5 |
| SS* External 8-32 and External M6 x 1.0 (AP6M8E) | 5 | SS* Internal 4-40 and External 1/4"-20 (AE4E25E) | 5 |
| SS* Internal 8-32 and External 1/4"-20 (AE8E25E) | 10 | - | - |
| HW-KIT6/M Metric Thread Adapter Kit | |||
|---|---|---|---|
| Item | Qty. | Item | Qty. |
| SS* External M4 x 0.7 and External M6 x 1.0 (AP6M4M) | 5 | SS* External 8-32 and External M4 x 0.7 (AP8E4M) | 5 |
| SS* Internal M4 x 0.7 and External M6 x 1.0 (AS4M6M) | 5 | SS* External M4 x 0.7 and External M3 x 0.5 (AP4M3M) | 5 |
| SS* External M6 x 1.0 and External 1/4"-20 (AP25E6M) | 5 | SS* External M4 x 0.7 and Internal M6 x 1.0 (AS6M4M) | 5 |
| SS* External 8-32 and External M6 x 1.0 (AP6M8E) | 5 | SS* Internal M3 x 0.5 and External M6 x 1.0 (AE3M6M) | 5 |
| SS* Internal M4 x 0.7 and External M6 x 1.0 (AE4M6M) | 10 | - | - |
*Stainless Steel
Additional Screws, Kits, and Adapters
Screw and Screw Adapter Kits