Fractional Left Hand Reverse Thread Taps

Shop high-speed steel (HSS) fractional left hand reverse thread taps for cutting and repairing internal inch threads that tighten counterclockwise. These taps are designed for specialized machinery, rotating equipment, industrial maintenance, and fabrication applications requiring left-hand threaded fasteners.

Select the correct nominal diameter, threads per inch (TPI), and available tap style, including UNC coarse or UNF fine specifications where offered. Confirm that your application requires left-hand threads before ordering. For help selecting the correct drill bit, consult our Tap and Drill Chart or Special Tap and Drill Size Calculator.