Kennametal 4131464 Hand Tap 2-56 Unc Bottoming Hss

Product Description

The KENNAMETAL 4131464 is a straight-flute hand tap designed for cutting 2-56 UNC internal threads in a bottoming configuration. Made from high-speed steel with a bright uncoated finish, this tap is built for right-hand threading in close-tolerance applications requiring a Class 2B fit and H2 thread limit. With an overall length of 1.75 inches and a thread length of 0.438 inches, it is sized for compact fastener applications where thread depth control matters. The two-flute straight-flute geometry suits through-hole and blind-hole work in softer materials. Machinists, tool-and-die tradespeople, and maintenance technicians reach for this tap when finishing threads to near full depth in a blind bore.

The 4131464 is rated for use in cast iron and non-ferrous metals, making it a practical choice for tapping aluminum, brass, bronze, and gray iron components. The bottoming chamfer style allows threads to be cut to the bottom of a blind hole, which is critical in precision assemblies where fastener engagement depth is constrained. It is well suited for bench work, hand tapping fixtures, and low-speed machine tapping operations where a straight-flute design is preferred over spiral-point configurations. This tap belongs to the Kennametal Series 5305 and 5303 product families.

Key Features

• Bottoming chamfer cuts threads to the bottom of blind holes for maximum thread engagement in shallow bores
• High-speed steel construction provides durability across cast iron and non-ferrous metal applications
• Bright uncoated finish is compatible with a wide range of cutting fluids and material types
• Class 2B fit and H2 thread limit deliver consistent tolerance control for standard fastener assemblies
• Two-flute straight-flute design handles chip evacuation in through holes and short blind holes
• Right-hand thread direction matches standard 2-56 UNC fastener specifications

Compatibility

Designed for cutting 2-56 UNC internal threads in cast iron and non-ferrous metals. Belongs to Kennametal Series 5305 and 5303. Suitable for hand tapping and low-speed machine tapping operations requiring a Class 2B fit.

Installation Notes

This tap is installed by hand or with a low-speed tapping machine; apply appropriate cutting fluid for the workpiece material before starting. Always ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the bore to avoid tap breakage. Back off periodically to break chips when tapping deeper blind holes. Follow shop safety practices and relevant OSHA guidelines when operating tapping equipment.