Kennametal 1544804 Spiral Point Tap 6-32 Unc Hss Tin

Product Description

The KENNAMETAL 1544804 is a spiral point tap designed for threading 6-32 UNC holes in production machining environments. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, it provides increased surface hardness and lubricity compared to uncoated taps. The plug chamfer (3-5 thread lead) allows the tap to start easily in through-hole applications and push chips ahead of the cutting edge rather than packing them into the flute. With a 2-flute design, an H3 thread limit, and a Class 2B fit tolerance, this tap suits standard fastener thread production in a range of ferrous materials. It measures 2 inches overall length with an 11/16-inch thread length.

This tap is suited for through-hole tapping operations in cast iron, ductile iron, stainless steel, and steel. The spiral point geometry makes it most effective in through-hole applications where chips can exit freely ahead of the tap. It is appropriate for use in CNC machining centers, drill presses, and tapping heads running at controlled feed rates. The H3 oversize limit accommodates standard plating allowances for Class 2B thread fits common in light fastener and instrument-grade assemblies.

Key Features

• 6-32 UNC thread form with H3 thread limit for Class 2B fit tolerance
• TiN coating increases wear resistance and reduces built-up edge in ferrous materials
• Plug chamfer (3-5 thread lead) optimized for through-hole tapping
• Spiral point geometry pushes chips forward, reducing chip packing and breakage risk
• Right-hand thread direction, no coolant-through requirement
• HSS construction compatible with standard tapping fluids and cutting oils

Compatibility

Rated for use in cast iron, ductile iron, stainless steel, and steel. Designed for through-hole tapping applications requiring a 6-32 UNC Class 2B thread form.

Installation Notes

This tap should be installed by a qualified machinist following standard tapping procedures. Power down and lock out any machine tool before changing tooling. Use appropriate tapping fluid or cutting oil for the workpiece material, particularly when working with stainless steel. Verify spindle speed and feed rate against manufacturer recommendations for the material and tap diameter before running production.