Kennametal 1544268 Hand Tap 8-32 Unc Plug Rh Tin Hss

Product Description

The KENNAMETAL 1544268 is a straight-flute hand tap designed for cutting right-hand internal threads to a 8-32 UNC specification. Built from high-speed steel with a titanium nitride (TiN) coating, it delivers extended tool life in demanding thread-cutting applications. The plug chamfer allows progressive thread engagement, making it suitable for through-hole tapping operations. With four flutes and a Class 3B fit to an H2 thread limit, this tap produces close-tolerance threads suited to precision fastener assembly. Overall length is 2.125 inches with a thread length of 0.75 inches. Machinists and toolroom technicians are the primary installers of this product.

This tap is intended for hand tapping operations in cast iron, stainless steel, and carbon steel workpieces. The TiN coating reduces friction and improves wear resistance when working through harder ferrous materials. The 8-32 UNC thread form is common in light mechanical assemblies, instrument panels, and enclosure hardware where machine screws are used. Series 2305 and 2308 designations apply. It is suited for both production and maintenance repair environments where hand tapping is performed at a bench or in the field.

Key Features

• TiN coating extends tool life and reduces friction in ferrous materials
• Plug chamfer for through-hole and deep-hole starting in right-hand thread applications
• Four straight flutes provide chip clearance and cutting stability
• H2 thread limit and Class 3B fit for close-tolerance thread production
• High-speed steel construction handles cast iron, stainless steel, and steel workpieces
• 0.168-inch shank diameter sized for standard tap wrenches and holders

Compatibility

Designed for use in Series 2305 and 2308 hand tap applications cutting 8-32 UNC right-hand threads in cast iron, stainless steel, and steel. Compatible with standard tap wrenches sized to a 0.168-inch shank diameter.

Installation Notes

Hand taps should be installed and driven using an appropriately sized tap wrench to maintain axial alignment and prevent tap breakage. Always secure the workpiece and ensure the correct tap drill size has been used prior to tapping. Back off the tap periodically to break chips, especially in blind holes or when working stainless steel. Follow applicable shop safety practices and wear appropriate eye protection when hand tapping.