[Shop-talk] Weird machine screw

[Gerald Brazil]

Are you likely to have any parts from a pre 1960 British car in your loose
screw can? It might be Whitworth.(though I've never seen any very small
Whitworth screws myself)

Even in the early 60's there was a Whitworth thread hidden in most British
cars.....it was the on the screw lug on the starter. It required a Whitworth
nut to fit it properly. Legend has it that a supply of these lugs and nuts
were discovered in a bombed out factory in France after the war and Lucas
bought the lot and continued to use them on their starters until they
exhausted the supply......One more reason to curse Lucas, The Prince of
Darkness...