Kennametal 4131523 Hand Tap 8-32 Unc Plug Hss 3-flute

Product Description

The KENNAMETAL 4131523 is a straight-flute hand tap designed for cutting internal 8-32 UNC threads in cast iron and non-ferrous metals. Built from high-speed steel (HSS) with a bright, uncoated finish, this plug-chamfer tap bridges the range between a starting taper and a bottoming tap, making it the most common choice for through-hole threading applications. At 2.13 inches overall length with a 0.75-inch thread length and a shank diameter of 0.168 inches, it fits standard tap wrenches used in production and maintenance environments. The H3 thread limit maintains tight tolerance control for Class 2B thread fit, and the three-flute geometry provides reliable chip clearance in the materials it is rated for.

This tap is suited for manual threading operations in maintenance, repair, and light production work. The plug chamfer makes it appropriate for through-holes where a lead-in of several threads is acceptable before full thread form is achieved. It falls within the KENNAMETAL Series 5305 and 5303 lineup and is appropriate for machinists, millwrights, and maintenance technicians working with cast iron components or non-ferrous assemblies such as aluminum housings, brass fittings, and similar workpieces.

Key Features

• 8-32 UNC thread form, right-hand cut, Class 2B fit
• H3 thread limit for consistent tolerance control in production and repair work
• High-speed steel construction rated for cast iron and non-ferrous metals
• Plug chamfer with 3-flute straight-flute geometry for reliable chip evacuation in through-holes
• Bright, uncoated finish suitable for use with cutting fluids standard to HSS tooling
• Compact 2.13-inch OAL fits standard tap wrenches and T-handle drivers

Compatibility

Rated for use in cast iron and non-ferrous metals per manufacturer specification. Part of the KENNAMETAL Series 5305 and 5303 tap families. Designed for standard tap wrenches accepting a 0.168-inch shank diameter.

Installation Notes

Secure the workpiece before threading and use the appropriate cutting fluid for the material being tapped. Apply steady, even pressure and back off periodically to break chips and prevent tap breakage. Inspect the tap for wear or damage before each use, as a dull or chipped HSS tap can seize and fracture in the hole. Always use a properly sized tap drill to the correct depth before starting the tap.