Irwin 8149: Plug Tap, 9/16-18 Nf - No.


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Irwin (Hanson) No. 8149 plug tap with 9/16-18 NF (National Fine) thread, made from high-speed carbon steel. Ideal for routine maintenance, repair work, and rethreading where high accuracy and tolerance thread is not critical. Straight flutes are ground to provide dependable chip evacuation, and the tap produces a class 2B thread. Suitable for through and blind hole tapping in steel and similar alloys when paired with proper lubrication; carded for easy identification and inventory control.