Tube nut thread size

Discussion in 'The Venerable Q-Jet' started by 1969briviera, Jul 3, 2022.

  1. 1969briviera

    1969briviera Antique Gold Poly

    Good morning,

    Looking for the thread size of the tube nut that goes into the filter housing of the Quadrajet.

    Thanks.
    Robbie
     
    Last edited: Jul 4, 2022
    1969briviera, Jul 3, 2022
    #1
  2. 1969briviera

    1969briviera Antique Gold Poly

    Thanks. I think you mentioned another nut. I meant the nut from the fuel tube to the carb.
     
    Last edited: Jul 4, 2022
    1969briviera, Jul 4, 2022
    #2
  3. Briz

    Briz Founders Club Member

    Off the top of my head I do not know the exact thread size and pitch but I do know it takes a 5/8" line wrench and a 1" wrench to hold the filter housing while you tighten it.
     
    Briz, Jul 4, 2022
    #3
    Max Damage and 1969briviera like this.
  4. DaWildcat

    DaWildcat Platinum Level Contributor

    5/8" - 18 tube nut. Typical for SAE 3/8" OEM fuel lines w/90° double flare, also known as inverted flare.

    And FYI the filter fitting thread into the carb itself is a lot more unusual, it's 1" - 20 UNEF (Unified National Extra Fine) thread.

    Devon
     
    DaWildcat, Jul 4, 2022
    #4
  5. 1969briviera

    1969briviera Antique Gold Poly

    Great info, thanks Devon.
     
    1969briviera, Jul 4, 2022
    #5

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