In a message dated 98-01-28 16:02:13 EST, Paul.Kile@Aerojet.com writes:
<< Part of the confusion is that the old Whitworth head measurement became
known as British Standard (BS). This is entirely different from the
modern thread pitch known as British Standard Fine (BSF). BSF is for
all intents and purposes the same as the SAE's United National Fine
(UNF). That's why you can go down to the local 'Murrican hardware store
and find bolts whose thread size will work on a B.
Clear as mud? I hope so, because this should be enough BS about BS! >>
Kile got it a little wrong, as others will point out. Whitworth is a course
thread and most American Course threaded bolts and nuts will work...although
the wrenches won't. BSF is not close to any American standard but on MGB's
that will not be a problem as you have few , if any BSF blots or nuts. Lucas
and SU never made the transistion and continued to use the BSF thread
standard. BSF is a fine thread. When the Brits went to the BSF standard,
they thoughtfully used a head size that was compatible with the older
Whitworth standard so the wrenches will fit.....some wrenches are marked in
both W and BSF.....
The real answer here is to buy a real MG, pre '56, and then get the proper
wrenches!!
Let the Flames begin !!!
TA Terry
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