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Thread: What "size thread" is this ?

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  1. #1
    Member
    Join Date
    Dec 2011
    Location
    Christchurch, NZ
    Posts
    49
    Quote Originally Posted by Philipo View Post
    I don't have a tread gauge, so I'll have to use some of you tools to work it out

    Attachment 15834

    Attachment 15835
    Philipo,

    From the measurements shown on your digital calipers I calculate that the thread is imperial and is 5/8 x 24 UNEF which according to Machinery's Screw Thread Book is 0.625" x 24 TPI x 60 degree thread form, Unified National Extra Fine.

    Used as a thread for suppressors and muzzle brakes on barrels with muzzle diameters of 18-22mm.
    "Only Accurate Rifles are Interesting"

 

 

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