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  1. #1
    Really Senior Member philb's Avatar
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    firing pin

    hi all

    can anyone tell me what the thread size is on an smle firing pin where it screws into the cocking piece plz ?

    note this is for a deact

    thanks

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    Contributing Member CINDERS's Avatar
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    I have a substitute sizes which was put together by a chap with over 30 years exp working on these, they will work well but if your a purest as he says then you will have to source the correct tap/die.

    He suggests on the chart I have a .25 x 30 TPI (Tap & Die 1/4 x 30)**

    ** = BSW Britishicon Standard Whitworth
    Last edited by CINDERS; 02-18-2018 at 06:32 PM. Reason: typo

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    Really Senior Member philb's Avatar
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    thanks

    ive herd 1/4 bsf is close ? or 1/4 bsp ??

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    Contributing Member muffett.2008's Avatar
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    I think you mean BSB, not BSP that is Britishicon Standard Pipe and is pretty big.
    Both BSF(British Standard Fine) and BSB(British Standard Brass) are both 26TPI

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