4-40 NC 13/16" OD HSS Die
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HSS UNC (Unified National Coarse) and NC (National Coarse) Dies are rugged, high‑performance threading tools designed for cutting, repairing, and restoring external coarse‑pitch imperial threads. Built from high‑speed steel, these dies offer excellent hardness, durability, and resistance to wear, ensuring clean, reliable thread cutting even under heavy workshop use. Coarse‑pitch threads are commonly used in construction, automotive work, machinery repair, equipment assembly, and general engineering due to their strength, ease of assembly, and superior resistance to stripping—especially in softer metals or high‑vibration environments. UNC/NC dies produce strong, forgiving thread profiles ideal for new thread creation, bolt repair, and maintenance of heavily used fasteners. Available in compact 13/16" OD formats for small‑sized NC threads and larger OD sizes for heavy‑duty UNC fasteners, these dies are compatible with standard die stocks and provide smooth cutting action across mild steel, stainless steel, brass, and aluminium.
- High‑speed steel construction provides exceptional durability, hardness, and extended tool life
- Precision‑ground cutting edges ensure smooth, accurate coarse‑thread formation
- Designed specifically for UNC and NC thread profiles used across construction, machinery, and automotive industries
- Ideal for cutting new threads or restoring damaged, worn, or corroded fasteners
- Coarse thread form resists stripping and performs well in softer metals and high‑vibration environments
- Smooth chip evacuation reduces heat buildup, friction, and cutting load
- Suitable for mild steel, stainless steel, aluminium, brass, and common workshop metals
- Compatible with standard die stocks and holders for flexible use in workshop or onsite environments
- Provides reliable, strong thread engagement for durable mechanical connections
- A dependable, professional‑grade solution for both light‑duty repairs and heavy‑duty industrial applications
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