1/2" NPT 2" OD HSS Die

HSS NPT (National Pipe Taper) Dies are precision-engineered threading tools designed for cutting, restoring, and repairing external tapered pipe threads used extensively across hydraulic, pneumatic, plumbing, gas, and industrial fluid systems. Manufactured from high‑speed steel, these dies provide exceptional hardness, edge retention, and long‑term durability, ensuring reliable thread production even under demanding workshop and field service conditions. NPT threads feature a tapered profile that tightens progressively as the fitting is assembled, creating a strong mechanical seal capable of withstanding pressure and vibration. Because sealing integrity relies on accurate thread geometry, these HSS dies are ground to deliver clean, consistent, and tightly‑toleranced thread profiles on a wide range of pipe metals including mild steel, stainless steel, brass, and aluminium. Available in all standard NPT pipe sizes and outside diameters suited for different die stocks, these dies are essential tools for technicians, fitters, plumbers, maintenance engineers, and fabricators working with U.S. standard piping systems.