7/16" UNF 1-5/16" OD HSS Die

HSS UNF (Unified National Fine) Dies are precision‑engineered threading tools designed for cutting, restoring, and repairing external fine‑pitch imperial threads. Manufactured from high‑speed steel, these dies deliver excellent hardness, wear resistance, and edge retention, ensuring clean and accurate thread formation across a wide variety of workshop metals including mild steel, stainless steel, aluminium, and brass. Fine‑pitch UNF threads are widely used in automotive, aerospace, mechanical assemblies, precision instruments, and applications where a higher number of threads per inch helps increase strength, resistance to vibration, and improved fastening security. UNF dies produce tight, precise threads ideal for components requiring a high level of mechanical reliability. These dies are available in multiple outside diameters to suit different die stocks and threading setups, making them suitable for both delicate work on small fasteners and heavy‑duty applications on larger bolts. Whether repairing damaged threads or creating new ones, HSS UNF dies offer professional‑grade performance and dependable results.