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1/2 x 20 nf tap by irwin ind tools 8145
Machine Screw And Fractional Taps
Ideal for routine maintenance, repair work and for rethreading where high accuracy and tolerance thread is not critical. Straight flutes are gound to provide rapid chip removal for efficient threading. designed for hand threading work in a variety of materials. Taps produce a class 2B thread.
No. 8145: 1/2-20NF IRWIN HANSON tap
