Tilley No.264 lamp pump thread

Discussion in 'Fettling Forum' started by Koalas, Nov 12, 2021.

  1. Koalas France

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    291B6DE5-3750-47D2-AD0F-354B1386CA9C.jpeg I guess the thread is whiteworth thread ,55 degrees
    1 in- 19 TPI or 24
    Who may help me confirm standard please
     
  2. Henry Plews

    Henry Plews Subscriber

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    @Koalas 1inch X 19 T.P.I. according to my thread gauge but I'm not sure if it's Whitworth or American National 60 degrees.
     
  3. Koalas France

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    Thank you I believe English lamps must use whiteworth thread 55 degrees
     
  4. Graham P

    Graham P Australia Subscriber

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    There are also B.A, (British Association) BSP (Pipe) BSF (Brit-- Standard Fine) Brass , Pipe and I think quite a few others. (I thought there were at least 49 thread standards )
    Try this " International Thread Standards " (I count 53)
     
  5. steerpike451

    steerpike451 United Kingdom Subscriber

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    Most British threads are 55° Whitworth form; the exceptions being BA (49.5°) and British Cycle which is 60° and usually 26TPI (it's often confused with British Standard Brass which is 26TPI x 55°)
    British made lamps and lanterns tend to use BA and BSB plus Whitworth Special- Tilley also used some proprietary threads.
     
    Last edited: Nov 20, 2021

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