Kennametal 1540367 Spiral Point Tap 2-56 Unc Hss

Product Description

The KENNAMETAL 1540367 is a spiral point tap designed for cutting internal 2-56 UNC threads in through-hole applications. Manufactured from high speed steel (HSS) with a bright uncoated finish, this tap uses a 2-flute, bottoming chamfer geometry that drives chips forward ahead of the cutting zone. It conforms to a Class 2B thread fit with an H2 thread limit, providing the tolerance control required for standard fastener assembly. With an overall length of 1.75 inches and a thread length of 0.438 inches, this tap is suited for small-diameter precision threading work performed by machinists, tool and die makers, and maintenance technicians.

This tap is intended for threading 2-56 UNC holes in cast iron and non-ferrous metals. The bottoming chamfer allows the tap to cut threads close to the bottom of a blind hole while the spiral point design maintains chip flow in through-hole configurations. It is commonly used in precision manufacturing, electronics assembly fixtures, and mechanical component fabrication where fine-pitch, small-diameter threads are required.

Key Features

• 2-56 UNC thread form, Class 2B fit with H2 thread limit for standard tolerance threading
• Bottoming chamfer geometry for threading close to the base of blind holes
• Spiral point design drives chips forward, suited for through-hole applications
• High speed steel construction with bright uncoated finish
• Right-hand thread direction, fractional inch measurement standard
• Rated for use in cast iron and non-ferrous metals

Compatibility

Designed for cutting 2-56 UNC internal threads in cast iron and non-ferrous metal workpieces. Suitable for use with standard tapping chucks and CNC rigid tapping setups that accept the appropriate shank diameter.

Installation Notes

Threading operations should be performed by a qualified machinist following standard shop safety procedures. Secure the workpiece fully before tapping and use appropriate cutting fluid for the workpiece material. Ensure the tap is properly aligned perpendicular to the hole to prevent tap breakage, which is a significant risk at this small diameter. Power down or disengage the machine spindle before manually advancing or backing out the tap by hand.