Kennametal 5416895 Spiral Point Tap 5/16-24 Unf Hss-e

Product Description

The KENNAMETAL 5416895 is a spiral point tap designed for through-hole threading in ferrous materials. Built from HSS-E (High-Speed Steel-E, material grade KSP39) with an oxide coating, it cuts a 5/16-24 UNF right-hand thread with a plug chamfer and 3 flutes. The spiral point geometry pushes chips forward ahead of the tap, keeping the flutes clear during through-hole operations. Overall length is 2.72 inches with a thread length of 0.69 inches and a neck length of 0.45 inches. Thread limit is H6. This tap is used by machinists, tool-and-die makers, and maintenance technicians working in production or repair environments.

The 5416895 is suited for through-hole tapping in steel, stainless steel, and cast iron. The plug chamfer — typically 3 to 5 threads of taper — makes it appropriate for starting in a pre-drilled hole and running through the full depth. It is used in CNC machining centers, drill presses, and manual tapping setups where chip evacuation forward through the hole is acceptable and preferred. The 5/16-24 UNF thread form is common in precision fastener applications across automotive, industrial, and mechanical assembly work.

Key Features

• Spiral point geometry pushes chips forward, ideal for through-hole threading
• HSS-E construction with KSP39 material grade for toughness in hard and abrasive materials
• Oxide coating provides basic lubricity and corrosion resistance during storage and use
• Plug chamfer for easy hole entry with 3 to 5 thread lead-in taper
• H6 thread limit for controlled tolerance fit on UNF threads
• Right-hand thread direction, 3 flutes, no coolant-through, non-interrupted thread form

Compatibility

Designed for through-hole threading in steel, stainless steel, and cast iron. Part of the KENNAMETAL T820 series. Compatible with standard tap holders and chucks accepting a 0.318-inch shank diameter.

Installation Notes

A licensed machinist or maintenance technician should select the correct tap drill size for 5/16-24 UNF before use and confirm the pre-drilled hole is clear of debris. Secure the tap in a properly aligned tap holder or rigid tapping chuck to avoid bell-mouthing the thread. Apply appropriate cutting fluid for the workpiece material — especially when tapping stainless steel. For through-hole applications, ensure the exit side of the hole is unobstructed so chips can advance freely without packing.