Kennametal 4131525 Hand Tap 8-36 Unf Bottoming Hss

Product Description

The KENNAMETAL 4131525 is a straight-flute hand tap designed for cutting 8-36 UNF internal threads in a variety of metalworking applications. Built from high-speed steel (HSS) with a bright uncoated finish, this tap delivers consistent thread quality in production and maintenance environments. It features a bottoming chamfer, which allows threading to run close to the bottom of a blind hole. The 4-flute design provides balanced cutting action and chip control. Overall length is 2.13 inches with a thread length of 0.75 inches. It carries a Class of Fit rating of 2B and 3B with an H2 thread limit. This tap is sized for right-hand thread cutting and is sold individually.

This tap is intended for use in cast iron and non-ferrous metals, making it well suited for general machining, repair work, and production tapping in job shops, maintenance facilities, and manufacturing environments. The bottoming chamfer style makes it the final tap used in a tapping sequence when full threads are needed near the bottom of a blind hole. It belongs to Kennametal Series 5305 and 5303. Both licensed machinists and skilled tradespeople working with precision fastener applications will find this tap appropriate for hand tapping operations.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• 4-flute straight-flute geometry for balanced cutting and chip management
• High-speed steel construction for durability across cast iron and non-ferrous metals
• Bright uncoated finish - no coating buildup to affect thread tolerance
• H2 thread limit ensures consistent 2B and 3B class of fit
• Right-hand thread direction, 8-36 UNF

Compatibility

Designed for cutting 8-36 UNF internal threads in cast iron and non-ferrous metal workpieces. Part of Kennametal Series 5305 and 5303.

Installation Notes

Hand tapping should be performed by a qualified machinist or tradesperson using a properly sized tap wrench. Secure the workpiece before tapping and ensure the tap is started perpendicular to the hole surface to avoid cross-threading. Apply appropriate cutting fluid for the material being tapped. When using a bottoming tap in a blind hole, clear chips periodically by backing the tap out to prevent tap breakage.