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Will a 3/8x16 NSC fit a 3/8x16 BSW

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  • Will a 3/8x16 NSC fit a 3/8x16 BSW

    OK I have a 3/8 x 16 NSC Drawbar and have my eye on a 3/8 x 16 BSW tool. I looked up both dimensions and it looks to be a 5 degree difference in thread angle. BSW is 55 degrees where NSC is 60 degrees.

    Would I have any ill effects that would come from using this tooling with the drawbar?

    Im just starting out in the metal working arena and learning as I go, Thanks for the help.

  • #2
    My guess is if you have a long handled drawbar wrench, You will not even notice the differance

    I would rather have tools that I never use, than not have a tool I need.
    Oregon Coast


    • #3
      Not going to work unless you can run a 3/8-16NC tap through the BSW thread.OR make a special 3/8-16 BSW drawbar for that tool.
      I just need one more tool,just one!


      • #4
        The combination will likely damage the drawbar.


        • #5
          The practical truth is the errors on commercial threads are that great both will fit each other and screw on with your fingers.

          There is a difference and in theory they won't fit, doesn't happen in real world on commercial bought items.

          Only one that does have a problem is 1/2" x 12 Whitworth is one pitch different to 1/2" x 13 UNC.

          Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.