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Guard Screw Thread Pitch?


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#1 ken98k

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Posted 05 July 2009 - 09:45 PM

Does anyone know the thread size / pitch of mauser guard screws?
I remember it was discussed here a couple years ago but a search didn't bring it up.
I believe it is 1/4X22 whitworth but I can't find a tap that size.

#2 Dr.Hess

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Posted 06 July 2009 - 08:53 AM

That sounds about right to me. I seem to recall it was 1/4" and TP right inbetween national course and national fine.

Besides Brownell's, et. al., I'm sure you could get a tap from a real machine tool supply place.

#3 Clemson

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Posted 06 July 2009 - 02:10 PM

1/4-22. Get the tap from Brownells.

Clemson

#4 Vladymere

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Posted 07 July 2009 - 07:44 AM

Be carfull with your tap though, they are pricey. I dropped mine on the concrete floor of my garage and the shank broke off the tap. I've been meaning to order another one. Midway doesn't carry them and I have not seen them listed at McMaster-Carr, Enco, MSC or Wholesale Tool.

Vlad

#5 lemski4

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Posted 08 July 2009 - 04:05 PM

They are 50 degree Whitworth thread and not 60 degree ASE.

#6 machinist1

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Posted 08 July 2009 - 07:23 PM

QUOTE (lemski4 @ Jul 8 2009, 06:05 PM) <{POST_SNAPBACK}>
They are 50 degree Whitworth thread and not 60 degree ASE.


Actually the Withworth thread series is 55 degrees.
Bob

#7 ken98k

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Posted 08 July 2009 - 10:23 PM

I ordered a 1/4x22 from Brownells. The don't say if its 55 whitworth or 60 American standard.

#8 Vladymere

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Posted 09 July 2009 - 01:31 PM

QUOTE (ken98k @ Jul 9 2009, 12:23 AM) <{POST_SNAPBACK}>
I ordered a 1/4x22 from Brownells. The don't say if its 55 whitworth or 60 American standard.



The tap from Brownells will be just fine Ken. Just be carefull not to drop it or you will be in the same boat I am, in need of another tap.

Vlad




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