Kennametal 5455863 Spiral Point Tap 8-32 Unc Hss-e Oxide

Product Description

The KENNAMETAL 5455863 is a spiral point tap designed for through-hole threading in ferrous materials. Built from HSS-E (High-Speed Steel-E) in the T820 series, this tap uses a 2-flute, spiral point geometry to push chips ahead of the cut, keeping the flutes clear during blind and through-hole applications. It carries an oxide coating to reduce friction and resist galling during the tapping operation. The 8-32 UNC thread form, right-hand cut, and H5 thread limit make it suited for precision threading work in medium-tolerance threaded fastener applications. Overall length is 2.125 inches with a thread length of 0.38 inches.

This tap is intended for through-hole threading in steel, stainless steel, and cast iron. It is commonly used in production machining, maintenance and repair operations, and general metalworking environments where consistent 8-32 UNC threads are required. The plug chamfer provides a gradual lead-in that distributes cutting load across multiple threads, making it a practical choice for both manual and machine tapping setups. Material grade KSP39 targets demanding ferrous applications where standard HSS tooling may wear prematurely.

Key Features

• Spiral point geometry pushes chips forward, ideal for through-hole threading
• HSS-E construction with KSP39 material grade for increased toughness in ferrous materials
• Oxide coating reduces friction and extends tool life in steel and stainless steel
• Plug chamfer distributes cutting load for smooth thread entry
• H5 thread limit for controlled fit in standard tolerance threaded applications
• Right-hand cut, 2-flute design compatible with standard tapping chucks and CNC holders

Compatibility

Designed for through-hole threading in steel, stainless steel, and cast iron workpieces requiring an 8-32 UNC thread form. Suitable for use with standard tapping chucks, floating tap holders, and CNC rigid tapping setups that accept the 0.168-inch shank diameter.

Installation Notes

This tap is installed and operated by machinists and tool and die professionals using standard tapping equipment. Before use, ensure the workpiece is securely fixtured and the drill hole is sized correctly for an 8-32 UNC tap. Apply appropriate cutting fluid for the workpiece material to prevent galling, especially in stainless steel. Do not reverse feed without proper tapping equipment, as the spiral point geometry is optimized for forward chip ejection in through-hole applications.