The crankshaft thread was much beloved by Austin. It appeared on Austin Seven crankshaft and half-shafts long before the A-type.
I have read that it was originally an Admiralty specification.
Discuss general restoration and car care topics (paint & body, upholstery, woodworking, etc) as well as tools.
The crankshaft thread was much beloved by Austin. It appeared on Austin Seven crankshaft and half-shafts long before the A-type.
I have read that it was originally an Admiralty specification.
OK sorry I asked this wrong - if you go to the (kijiji) ad it is selling wrenches and sockets - I thought the different bolt head sizes were metric/ Imperial (American) and Whitworth.
Aren't the head dimensions of BSF and BSW threads the same as any other imperial bolt size? IE a 7/16 bolt uses a 7/16 wrench regardless of thread size?
John-Peter Smit
1976 MG Midget
1969 Vauxhall Viva GT
1958 Fiat Multipla (Barn art)
American wrench sizes are measured Across Flats. A 1/4 in bolt has a 7/16 head, typically, a 5/16 has a 1/2 inch.
BS wrenches (spanners) are marked with the thread size, and the heads are not the same as SAE sizes.
There's a nice chart at https://www.samstagsales.com/whitworth_table.htm that gives the AF sizes for various British spanners.
Randall
56 TR3 TS13571L once and future daily driver
71 Stag LE1473L waiting engine rebuild
71-72-73 Stag LE2013LBW waiting OD gearbox rebuild
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