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                | T O P I C    R E V I E W |  
                | Foghorn | Posted - 28 May 2014 : 7:47:07 PM Ok!  I'll play BSA's silly game.
 Who can tell me what thread is used on the B31 (1951) plunger carrier tube- the one that the top plug screws into?
 Mine is 0.861"OD and 20 TPI.  If I accept that it is 7/8" OD nominal, what thread system has 20 TPI for 7/8" diameter?
 Where can I buy borrow or hire a die nut and tap for such an one?
 
 It is almost metric 2.5 pitch, but there is no 22 mm thread in the metric system.
 3/4" BSC (cycle) can be 20 TPI, but I have not seen it in 7/8".
 All advice (and abuse) greatfully accepted.
 Foghorn
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                | 2   L A T E S T    R E P L I E S    (Newest First) |  
                | Foghorn | Posted - 31 May 2014 : 5:33:28 PM Thanks Mick.
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                | matcho mick | Posted - 29 May 2014 : 11:24:34 PM http://www.stevenott.com/bsatrinbw.htm
 
 knock yourself out
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