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Thread: Whitworth Question

Discuss general restoration and car care topics (paint & body, upholstery, woodworking, etc) as well as tools.

  1. #21
    Luke Skywalker Roger's Avatar
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    Re: Whitworth Question

    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.

  2. #22
    Great Pumpkin JPSmit's Avatar
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    Re: Whitworth Question

    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)

  3. #23
    Luke Skywalker Roger's Avatar
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    Re: Whitworth Question

    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.

  4. #24
    Great Pumpkin TR3driver's Avatar
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    Re: Whitworth Question

    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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