Kennametal 1541500 Hand Tap 8-32 Bottoming Hss Unc

Product Description

The KENNAMETAL 1541500 is a straight-flute hand tap designed for cutting 8-32 Unified National Coarse (UNC) internal threads in through-hole and bottoming applications. Built from bright, uncoated high-speed steel (HSS), it delivers reliable thread-cutting performance in cast iron and non-ferrous metals. The bottoming chamfer geometry allows threading to the bottom of a blind hole with minimal clearance. With an overall length of 2.13 inches and a thread length of 0.75 inches, this is a compact tap suited for standard machine screw thread work. Class of fit is 2B with an H3 thread limit, meeting typical fastener assembly tolerances for general mechanical and production applications.

This tap is used in machining, maintenance, and repair environments where 8-32 machine screw threads are required in cast iron or non-ferrous materials such as aluminum, brass, and copper alloys. Its right-hand, 2-flute straight-flute design makes it straightforward to use in hand-tapping operations with a standard tap handle or T-handle wrench. The bottoming chamfer makes it the appropriate choice when threaded depth in a blind hole must be maximized. It is offered under Kennametal Series 5305 and 5303.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• High-speed steel construction for durability across cast iron and non-ferrous metals
• Bright uncoated finish suitable for use with standard cutting fluids
• H3 thread limit and 2B class of fit for standard fastener thread tolerances
• 2-flute straight-flute design for straightforward chip clearance in hand-tapping
• Right-hand thread direction, compatible with standard tap handles and fixtures

Compatibility

Designed for cutting 8-32 UNC internal threads in cast iron and non-ferrous metals. Part of Kennametal Series 5305 and 5303. Intended for hand-tapping operations requiring a bottoming chamfer with a 2B class of fit and H3 thread limit.

Installation Notes

This tap is installed by machinists, tool and die workers, and maintenance technicians using a standard tap handle or T-handle wrench. Always secure the workpiece and apply appropriate cutting fluid before beginning the tapping operation. For blind holes, clear chips frequently to prevent binding and potential tap breakage. Power down any associated machinery and follow shop safety protocols before hand-tapping operations in a production environment.