NPT= National Pipe Thread. NPTF = National Pipe Thread Fuel. Both NPT and NPS have the same thread angle, shape, and pitch (threads per inch). However, NPT threads are tapered and NPS threads are straight (parallel). Both threads have a 60° included angle and have flat peaks and valleys. Tapered Pipe Thread is commonly found
R" HSS Black & Gold KFD Split Point Jobber Length Drill Bit. KFD Killer Force Drill Bits are manufactured from M2 premium grade high speed steel. For use in a wide range of materials such aluminum, iron and stainless steel; 135° split point tip for fast penetration and accurate drilling; Round shank for use in a wide range of tool holding systems
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1 2 npt thread drill size