Kennametal 4131463 Hand Tap 1-72 Unf Bottoming Hss

Product Description

The KENNAMETAL 4131463 is a straight-flute hand tap designed for cutting internal 1-72 UNF threads in a bottoming configuration. Manufactured from high-speed steel with a bright uncoated finish, this tap produces right-hand threads to a Class 3B fit with a Thread Limit of H1, making it well-suited for precision threading applications where tight tolerances are required. With an overall length of 1.69 inches and a thread length of 0.375 inches, the tap is compact and intended for use in confined or shallow-bore applications. It features 2 flutes in a straight-flute geometry, which provides reliable chip clearance during hand tapping operations.

This tap is intended for use in cast iron and non-ferrous metals, covering a range of light-to-moderate production and maintenance threading tasks. The bottoming chamfer allows threads to be cut to the bottom of a blind hole, which is the primary reason this style is selected over taper or plug chamfer taps. It carries the KENNAMETAL Series 5305 and 5303 designations and is packaged individually. Typical users include machinists, maintenance technicians, and tool and die workers performing hand tapping with a tap wrench or guided tapping fixture.

Key Features

• Bottoming chamfer cuts threads to the bottom of blind holes
• High-speed steel construction provides wear resistance across cast iron and non-ferrous metal applications
• Bright uncoated finish maintains dimensional accuracy without added coating buildup
• 2-flute straight-flute geometry supports chip clearance during hand tapping
• Class 3B fit with H1 thread limit ensures precision thread form and tolerance control
• Compact 1.69-inch overall length suits confined workpiece access

Compatibility

Designed for hand tapping 1-72 UNF internal threads in cast iron and non-ferrous metal workpieces. Part of KENNAMETAL Series 5305 and 5303.

Installation Notes

This tap is intended for installation by machinists or maintenance technicians using a hand tap wrench or guided tapping fixture. The workpiece should be secured and the hole properly drilled to the correct tap drill diameter before threading begins. Apply appropriate cutting fluid for the material being tapped to reduce friction and extend tap life. Do not force the tap against resistance; back off periodically to break chips and prevent tap breakage.