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  1. #1
    Member gjock's Avatar
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    Nov 2008
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    watertown, New York
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    2008 kubota bx2660

    Default what size quick connect?

    I am trying to find a female quick connect coupler for my kubota bx2660. The ones that are on my loader have the following #'s IT BF 15-04 1/4" NPTF k08
    I cant find a cross reference for it and i'm not sure what the numbers mean, any help would be great.

  2. #2
    Super Star Member J_J's Avatar
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    Sep 2003
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    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: what size quick connect?

    Remove the QD and take it with you to the hyd supply for a match. It is a National Pipe Thread Female, and 1/4 in size.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  3. #3
    Silver Member
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    Discount Hydraulic Hose's Avatar
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    Jul 2008
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    Philadelphia, PA
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    Default Re: what size quick connect?

    Quote Originally Posted by J_J View Post
    Remove the QD and take it with you to the hyd supply for a match. It is a National Pipe Thread Female, and 1/4 in size.
    Since this is a quick coupler, and most of them do have female threads, JJ is probably right about being female. Still, I'd like to clear up a misconception that I encounter many, many times in my business.

    The F in NPTF does not mean female.

    NPTF stands for National Pipe Tapered Fuel. Both NPT and NPTF have the same threads-per-inch, pitch diameters, and taper-per-inch. The differences come in the major and minor diameters, the root and crest of the threads. The NPTF thread crests fall with in the parameters of the NPT requirements, but have a smaller range than the NPT.

    ASSEMBLING NPT AND NPTF FITTINGS

    NPT threads are designed to screw together. In most cases there will be no interference between the root and crest of the threads at assembly. The thread is designed to be assembled with some form of sealant to assure a leak free joint.

    NPTF threads will screw together with NPT threads and should have no noticeable assembly problem. There will most likely be an interference fit between the root and crest on either the major or minor diameter of the thread, depending on which part is NPTF. To accomplish a seal on the joint, a sealant will be required.

    NPTF threads are designed to screw together. They are designed to have interference at the roots and crests of the threads on both the major and minor diameters. This interference should cause no assembly problem. The thread deformation caused by the interference fit and the wrench tightening is designed to make a dry mechanical seal.

    The requirements for NPT (National Pipe Thread) are spelled out in ANSI B1.20.1
    The requirements for NPTF (National Pipe Thread Fuel) are spelled out in ANSI B1.20.3

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