21-02-2019, 12:04 AM
Not being an engineer, I must confess I'd never heard of Whitform until recently. But I was informed yonks ago that the half-shaft and starter dog threads were an Admiralty thread, acquired from Austin's war efforts over WW1. Are the threads the same, or was I misinformed? Incidentally, the louvres on genuine Ulsters were metric, so not everything on a Seven was Whit or BSF as is generally accepted. Perhaps strange threads elsewhere as well? Cheers, Bill in Oz