Kennametal 4131593 Hand Tap 10-32 Unf Bottoming Hss

Product Description

The KENNAMETAL 4131593 is a 10-32 UNF bottoming hand tap designed for threading operations that require full thread engagement close to the bottom of a blind hole. Built from high-speed steel with an oxide coating, this 4-flute straight-flute tap handles right-hand threading in ferrous materials with consistent performance. It carries a 2B class of fit and an H3 thread limit, making it suitable for standard tolerance threading where dimensional accuracy and repeatable fit are required. Overall length is 2.375 inches with a thread length of 0.875 inches and a shank diameter of 0.194 inches. Bottoming chamfer geometry allows threading to within a few threads of the hole bottom.

This tap is suited for job shop, maintenance, and production threading work in cast iron, ductile iron, and steel. The bottoming chamfer makes it the correct choice when a plug or taper tap has already started the thread and full-depth engagement at the base of a blind hole is required. It is intended for hand tapping operations and is compatible with standard tap wrenches sized for the 0.194-inch shank diameter. Typical applications include machine component repair, fixture fabrication, and production threading of 10-32 UNF fastener holes in ferrous workpieces.

Key Features

• Bottoming chamfer allows full thread engagement at the base of blind holes
• High-speed steel construction provides durability in ferrous material threading
• Oxide coating improves wear resistance and reduces galling during tapping
• 4-flute straight-flute design for stable, consistent thread formation
• H3 thread limit and 2B class of fit for standard dimensional tolerance control
• Right-hand thread direction for conventional threading operations

Compatibility

Designed for threading 10-32 UNF right-hand threads in cast iron, ductile iron, and steel workpieces. Intended for use with standard tap wrenches accepting a 0.194-inch shank diameter.

Installation Notes

This tap is installed by hand using a standard tap wrench. Secure the workpiece before tapping and ensure the tap is started square to the hole to prevent thread damage or tap breakage. Apply appropriate cutting fluid for the material being tapped. For blind holes, use a taper or plug tap to start the thread before using the bottoming tap to complete full thread depth.