3BA 13/16" OD HSS Die

HSS BA (British Association) Dies are precision-engineered threading tools designed for cutting, restoring, and repairing external BA threads—an imperial thread system widely used in electrical components, instrumentation, fine mechanical assemblies, and older British‑designed equipment. Manufactured from high‑speed steel, these dies deliver excellent hardness, wear resistance, and longevity, ensuring clean and accurate thread profiles even in demanding workshop conditions. BA threads feature unique pitch and diameter combinations not shared with other imperial standards, making BA dies essential for maintaining compatibility with legacy equipment, small‑scale assemblies, and precision mechanical devices. The finely ground cutting edges promote smooth chip flow and reduced cutting resistance, resulting in crisp, reliable thread formation on metals such as brass, mild steel, stainless, and aluminium. Compact OD formats ensure compatibility with standard die stocks and provide excellent control for delicate threading tasks.