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Fuel pump threads

Discussion in '"Stock" Alpine' started by RootesRooter, Aug 22, 2020.

  1. RootesRooter

    RootesRooter Platinum Level Sponsor

    Anybody know what size and kind of threads are on the intake side of a stock fuel pump?
  2. DanR

    DanR Diamond Level Sponsor

    Rootes, Excuse me for asking a dumb question, But, what is the "intake side" of a fuel pump ?

    Never mind!!! It finally registered in this olde pea pick'n brain. I'll go look and let you know tomorrow, if that is not too late?
    Last edited: Aug 22, 2020
  3. bernd_st

    bernd_st Bronze Level Sponsor

    The intake side is the one pointing towards the rear of the car once the pump is mounted on the block...
    Last edited: Aug 23, 2020
  4. DanR

    DanR Diamond Level Sponsor

    20200823_132958.jpg Rootes, Here's a couple PIC's of new fuel pumps. With and without bowls. 20200823_133406.jpg

    Both have #10 - 32tpi with lengths of 1/2" including the lock washer.

    The inlet is identified by the "arrow" under my finger.

    Hope this helps

    Last edited: Aug 23, 2020
  5. DanR

    DanR Diamond Level Sponsor

    After all of that, I begin to think you are asking for the thread size on the connection "from" the fuel tank to the "inlet" on the stock fuel pump??
  6. hartmandm

    hartmandm Moderator Platinum Level Sponsor

    Do you mean this connector?


    Thread OD is 0.498"
    Thread ID is slightly less than .475"
    Looks like 20 tpi
    Threads appear parallel.

    It could be UNF 1/2" - 20

    But British Standard Pipe Parallel size 1/4 looks close, too. However, the 20 tpi gauge looked like a good fit on the threads:


    And some extra info. Not sure where I found this, though.

    Fuel pump fittings

    By David Hall

    I had a lot of trouble sorting out how to hook up the fuel pipe to the crossover pipe in back and into a Sunbeam Specialties SU fuel pump. A company called Hose and Fittings seems to have the correct BSP straight fittings and is easy to deal with.

    For the crossover outlet, you need a female BSPP #1007-08L-04, cost $2.82 each. For the fuel pump male BSPP, use 1003-08L-06, $2.82 each. Each has the compression fitting for the stainless fuel pipe. Visit www.hoseandfittings.com

    717 Davis St.

    Fort Wayne, IN 46808

    Phone 260-426-4673

  7. DanR

    DanR Diamond Level Sponsor

    Michael, I believe you did a Great job as usual, that should answer the question for lots of Guys:)
  8. RootesRooter

    RootesRooter Platinum Level Sponsor

    Thanks for the info.

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