OSG Threading Tap - UNF Spiral Point HSS-E - Steam Oxide Coated - Through Hole - No. 12 x 28

The OSG UNF Spiral Point Threading Tap No. 12 x 28 is a precision-through-hole threading tool designed for professionals who demand reliable, high-quality threads in metal parts. Built with cobalt-enhanced HSS and a durable Steam Oxide coating, it delivers strong performance in production environments.

• Thread size and pitch: No. 12 x 28 UNF (28 threads per inch) for fine-pitch through-hole threading
• Design: Spiral Point (gun tap) geometry to push chips forward and minimize clogging in through-hole applications
• Material: HSS-E (high-speed steel with cobalt) for increased hardness and heat resistance
• Coating: Steam Oxide coating that enhances wear resistance and helps with lubrication retention
• Application: Specifically optimized for through-hole tapping, providing consistent thread quality from entry to exit

In practice, this tap delivers precise thread profiles with minimal runout, thanks to its robust construction and optimized geometry. The cobalt-infused steel tolerates higher cutting temperatures, enabling efficient feeds while maintaining thread integrity. The steam oxide finish reduces galling and improves lubrication retention across repeated passes, extending tool life and reducing downtime in production. Ideal for fastener holes, brackets, housings, and other components requiring reliable, end-to-end threading.