Jump to content

- - - - -

Forearm Screw

  • Please log in to reply
3 replies to this topic

#1 Grenadier916



  • Regular Group
  • 35 posts
  • Location:Hillbillyville, USA
  • Interests:WW1, WW2 history and wishing I could afford a fullauto 1928

Posted 13 November 2003 - 12:12 PM

Got mine from Gunparts the other day in 2 days. Pretty good service I think!
Anyway when I removed my pistol grip to install my newly made forearm from Deerslayer. I noticed the screw hole had been buggered some. Is it possible to buy a tap with the proper number of threads so I can clean this one up?
  • 0

#2 Bisley45


    Long Time RKI Member

  • Regular Group
  • 602 posts
  • Gender:Male
  • Location:Illinois ( Gun Owner's Hell )
  • Interests:Thompsons, 1911's, Collect & Shoot Colt Pistols and Revolvers, American Civil War, anything that shoots

Posted 13 November 2003 - 01:07 PM

IMPORTANT the thread is 14 - 24 NOT 1/4" - 24.

Mr Doug Richardson comes to mind, but if you have machine tool supliers in your area they might be able to hook you up with one. Size 14 - 24 is a dinasour, it hasn't been in standard use for a while. 1/4" - 24 is .0080" LARGER than 14 - 24. this size diffeerance may seem small but when it comes to threads it's the differance between it holding and suddenly dropping out onto the floor.


sad.gif SORRY PK, your right it's 24TPI

  • 0

#3 PK.


    Technical Expert

  • Board Benefactor
  • 1589 posts
  • Gender:Male
  • Location:CO, USA
  • Interests:Full time gunsmith who loves Thompson's, 46+ years experience.

Posted 13 November 2003 - 03:14 PM

It is NOT 14-20 but 14-24 !!!!

Doug lists taps, I have them also. This size has not been in common usage since WWII.
  • 0

#4 TM76


    Respected Member

  • Board Benefactor
  • 274 posts
  • Gender:Male
  • Interests:Riding my Harley ,Traveling, Shooting my Tommy Gun, Target shooting, Teaching my kids,grandkids safety with firearms.

Posted 13 November 2003 - 06:38 PM

I got my 14-24 tap from PK,it worked great, I needed to clean up
the threads on my WH 28 grip mt.,the bolt diden't screw in all the
way and messed up the threads a little bit.I reamed out the grip
just enough so the bolt went all the way thrue.
I did have to grind the tap down to make it a bottom tap, so the main
threads on the tap would go thrue the grip mt,with out hitting the barrel
See Ya
  • 0