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Tool Kit Wrenches Spanners

Discussion in '"Stock" Alpine' started by twautomotive, Sep 21, 2021.

  1. twautomotive

    twautomotive Bronze Level Sponsor

    The Rootes parts book list some wrenches as nut , some as bolt and some without the words nut or bolt. Does anyone know an explanation for this? I are most interested in how to tell a 1/2" x 7/16" UNF spanner from a 7/16" (BOLT) x 1/2" UNF spanner? Were nut and bolt sizes different or ???
    Tom (a little nut)
  2. hartmandm

    hartmandm Moderator Platinum Level Sponsor

    I assume you mean the last 4 entries:

  3. twautomotive

    twautomotive Bronze Level Sponsor

    Yes, this is the source of what I do not understand.
  4. Pete S.

    Pete S. Bronze Level Sponsor

    That is an old Whitworth designation. If my memory is correct, Whitworth and BSF (British Standard Fine) "spanner" markings used to refer to the bolt diameter -rather than the distance across the flats of the hexagon nut (A/F) as in other standards.

    Seems archaic now, but Whitworth is the world's first national screw thread standard.

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