OSG UNF Spiral Point Threading Tap, 5/8 x 18 UNF, is engineered for precise through-hole tapping with durability you can trust. Crafted from HSS-E (high-speed steel with cobalt) and finished with a Steam Oxide coating, it’s built to handle demanding machining tasks while delivering clean, accurate threads.

• Thread size and standard: 5/8-18 UNF threading for through-hole applications, designed to meet exacting thread requirements.
• Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and heat resistance during heavy use.
• Coating: Steam Oxide finish to improve wear resistance and extend tool life in tough machining environments.
• Cutting geometry: Spiral Point design that efficiently evacuates chips and pushes them out of the hole, reducing clogging and rework.
• Application: Specifically optimized for through-hole tapping to produce consistent, high-quality threads in a single pass.
• Brand and lineage: Part of OSG’s HY-PRO line of premium spiral-point taps, trusted for precision threading in professional shops.

This combination of a cobalt-enhanced alloy, steam oxide coating, and a spiral-point geometry translates to more reliable thread formation, fewer interruptions for chip clearing, and longer tool life. Whether you’re finishing a critical through-hole component or performing high-cycle production tapping, this tap helps you achieve repeatable, accurate threads with minimal downtime.