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Re: TR3 - Installing Head studs.

Subject: Re: TR3 - Installing Head studs.
From: Randall <randallyoung@earthlink.net>
Date: Sun, 19 Mar 2000 22:44:18 -0800
Cc: List Triumph <triumphs@autox.team.net>
References: <200003190740_MC2-9DAC-329C@compuserve.com> <002d01bf91ec$325c91a0$5ee731d4@insbruk> <38D59374.AF73454D@virginia.edu>


"James A. Ruffner" wrote:
> 
> The stud holes in the block are Whitworth threads!  

James, I beg to differ.  The studs are 1/2" diameter, and 1/2" BSW is 12
tpi.  My TR3s all have 13 tpi, which makes them clearly UNC threads. 
The nut end is 20 tpi, which is clearly UNF, not BSF (1/2" BSF is 16
tpi).

FWIW, my charts do not list _any_ British thread with 13 tpi.

Randall
59 TR3A TS39781LO

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