Setscrews and Thumbscrews (2024)

Screws Selection Guide
Setscrews and Thumbscrews
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
2-564-406-328-321/4"-20M3 x 0.5M4 x 0.7M6 x 1.0
Setscrew TypeNylon TippedCup Point or
Nylon Tipped
Nylon TippedCup 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&nbsp(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 SETSCREW5/64in [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 &nbsp(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 &nbsp(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 &nbsp(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&nbsp(posted 2019-12-13 09:06:42.1)

Is there a part number for the nylon tipped M6 setscrew used in PMTR/M?

YLohia &nbsp(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&nbsp(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 &nbsp(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 &nbsp(posted 2018-03-21 09:07:15.477)

Good Morning,i'm looking for part number SS4S019 but nothingcomes up when i search on your web site ?that number is called out on your part CP12Tony Mormile

llamb &nbsp(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 &nbsp(posted 2016-02-03 09:47:44.303)

Metric nylon tipped M3 and M4 set screws would be great to have.

besembeson &nbsp(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 &nbsp(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 &nbsp(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 &nbsp(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 &nbsp(posted 2009-05-07 09:44:46.0)

Hi,Do you provide these screws in metric sizes?Liam.

Setscrews and Thumbscrews (2024)
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