The OSG UNC Spiral Point Threading Tap is a precision tool designed for through-hole threading in metalworking. Built with HSS-E cobalt and finished with a steam oxide coating, it delivers durable performance and consistent, high-quality threads in demanding applications.

• No. 3 x 48: UNC size No. 3 with a 48 mm overall length, optimized for through-hole tapping.
• Material: High-Speed Steel with cobalt (HSS-E) for enhanced hardness and wear resistance.
• Coating: Steam oxide finish to improve wear resistance and heat tolerance in tough cutting environments.
• Threading design: UNC spiral point geometry that efficiently evacuates chips and promotes smooth hole threading.
• Through-hole compatibility: Specifically engineered for reliable internal threads in through-hole applications.
• Technology: OSG’s advanced threading technology ensures precise, repeatable thread forms and extended tool life.

This tapping solution helps machinists achieve clean, accurate threads with reduced chip packing and less downtime. The combination of HSS-E cobalt and steam oxide coating stands up to heat and wear, making it well-suited for production runs and critical machining tasks where consistency matters. Whether you’re setting up a through-hole fastener or finishing a series of components, this OSG tap delivers dependable performance and long-term value.