1911 grip bushings thread/pitch

plautus

July 08, 2002 13:29

I bought a PAC 1911A1 which has "fat" grip screws which attach the the frame directly instead of using the GI style bushings.

These screws are smaller than the 1911 GI bushings and centered in the same location. I'd like to ream and tap the frame to accept the proper bushings, but I do not know the thread and pitch of the GI style. It looks like 1/4 inch diameter.

Anyone help here?

thanks

regards

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  101AIRBORNE

  July 08, 2002 14:18

  Plautus,
  
  A suggestion would be to look at Brownells. They make them in standard
  and oversize. Drill size is 7/32". www.brownells.com
  101

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  azgunnut2@yahoo.com

  July 08, 2002 21:34

  o.k. :
  grip screws are .150 - 50 tpi
  standard bushings are .236 - 60 tpi oversized bushings are .255 - 60
  in most cases,the .255x60 (oversize) tap will retap (rethread) a
  stripped standard bushing hole with-out redrilling...if you need to
  retap , good luck finding a tap , unless you order it from "brownells"
  or another "gunsmithing" supply source........
  Good Luck !!!!!!!!!!!
  
  Join / Support the NRA
  Guns are my friends !!!

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  plautus

  July 09, 2002 22:49

  thanks for the info. found the tap on brownell's website for ~~$29
  
  regards
  
  pl

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  101AIRBORNE

  July 09, 2002 23:27

  Plautus,
  
  GLAD TO SEE THAT YOU RECEIVED THE INFO THAT YOU WERE LOOKINF FOR.
  AZ GAVE YOU THE PRIME INFO. BROWNELLS IS ONE QUALITY SUPPLIER.
  SUGGEST THAT YOU DELETE THIS POST. BEST, STEVE

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  plautus

  July 16, 2002 05:13

  Update-
  
  Got a titantium 7/32 bit and a the tap from Brownell's and the operation went just FINE!
  
  I set my drill to max at 1000 rpm and used lots of drilling oil on the holes. I'd recommend using a drill press just to be safe, but I did it by hand and it was fine. If you've got a steady hand, you can do it this way.
  
  I like my PAC 1911 a lot and now it's closer to perfection.
  
  Thanks for the info, folks.
  
  
  
  ===
  "If cowardly and dishonorable men sometimes shoot unarmed men with army pistols or guns, the evil must be prevented by the penitentiary and gallows, and not by a general deprivation of a constitutional privilege." - Arkansas Supreme Court, 1878

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