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  • Machine Screw Tap, National Course Thread, #4 x 40

    Machine Screw Tap, National Course Thread, #4 x 40

    Irwin

    • $4.29
      Unit price per 


    #4 x 40, national course thread, machine screw tap, carbon steel, ideal for routine maintenance, repair work & for rethreading where high accuracy & tolerance thread is not critical, straight flutes are ground to provide rapid chip removal for efficient threading, designed for hand threading work in a variety of materials taps produce a class 2b thread, use drill bit #43 or 5/64".


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