The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > The Smithy

Thread Tools Search this Thread
Old July 4, 2010, 03:24 PM   #1
Senior Member
Join Date: November 28, 2007
Posts: 302
thread pitch

I have a Colt national match with the elliason rear sight. There is a small nut on the windage adjusting screw that fell off after the staking failed and I need to make a new one. I was wondering if anyone knows the thread pitch of the adjusting screw as my place of work is shut down for a bit and my pitch gages are there. I can easily make the part but if anyone can help it will be appreciated.
cheezhed is offline  
Old July 4, 2010, 04:49 PM   #2
Join Date: March 4, 2005
Location: Ohio
Posts: 13,820
I've forgotten. Let's figure it out. The windage is about 1 moa per click and the elevation is about 3/4 moa per click on that sight on that gun. The windage is 8 clicks per revolution. The rear surfaces of the front and rear sights are 6 11/16" (6.63875") apart. So. . .

8' = (8/60)° = 0.13333…°,

and that means,


sin(.13333…°) = 0.002327

1 / (6.6875 × 0.002327) = 64.257

So it looks like 64 TPI is likely. 2-64 is a standard UNF thread, but it certainly could be a special.
Gunsite Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Rifle Instructor
NRA Benefactor Member

Last edited by Unclenick; July 4, 2010 at 05:08 PM.
Unclenick is offline  

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 03:56 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2017 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent:
Contact Us
Page generated in 0.04257 seconds with 7 queries