Engineered for precision through-hole threading, the OSG UNC Spiral Point Threading Tap delivers reliable 3/8-16 UNC threads with outstanding durability. Crafted for demanding machining tasks, this tap combines high‑speed steel with cobalt (HSS‑E) and a tough Steam Oxide finish to resist wear and heat.

• Thread size: UNC 3/8-16 through-hole threading tap for reliable, standard-spec threads
• Material: HSS‑E (high-speed steel with cobalt) for enhanced hardness and heat resistance
• Coating: Steam oxide coating to improve wear resistance and lubricity during tapping
• Flute design: Spiral Point geometry to efficiently evacuate chips in through-hole applications
• Application: Ideal for through-hole tapping in metalworking environments where consistent thread quality matters
• Technology: Builds on OSG’s advanced threading technology for precise thread formation and extended tool life

This tap helps you achieve clean, accurate threads with reduced risk of built-up chips and premature wear. The spiral point pushes chips out of the hole, streamlining production and minimizing tapping downtime. With HSS‑E’s superior heat tolerance and the Steam Oxide coating, you’ll experience dependable performance even under tougher cutting conditions. Ideal for shops and production environments that require repeatable results, long tool life, and dependable through-hole threading.