Kennametal 1542598 Spiral Point Tap 3/8-16 Unc Hss

Product Description

The KENNAMETAL 1542598 is a spiral point tap designed for threading 3/8-16 UNC holes in production and maintenance machining applications. Made from high speed steel (HSS) with a bright uncoated finish, this tap drives chips forward ahead of the cut, making it well suited for through-hole threading where chip evacuation is critical. The plug chamfer distributes cutting load across the first several threads for controlled entry. It carries a Class 3B thread fit and an H3 thread limit, delivering tight, consistent thread tolerance. Overall length is 2.9400 inches with a 1.2500-inch thread length.

This tap is intended for use in cast iron, ductile iron, and non-ferrous metals. The spiral point geometry works best in through-hole applications where chips can be pushed clear of the cutting zone. It is well suited for CNC machining centers, drill presses, and manual tapping operations where coolant-through tooling is not required. The right-hand thread direction is standard for conventional fastener threads. It belongs to Kennametal Series 5301, a fractional-inch line covering common thread sizes for general metalworking shops and production environments.

Key Features

• Spiral point geometry pushes chips forward for efficient through-hole threading
• High speed steel construction provides toughness across a range of workpiece materials
• Bright uncoated finish suits cast iron, ductile iron, and non-ferrous metal applications
• Plug chamfer distributes cutting forces for smooth thread entry
• H3 thread limit and Class 3B fit ensure consistent tolerance control
• No coolant-through requirement simplifies setup on standard equipment

Compatibility

Designed for threading 3/8-16 UNC through holes in cast iron, ductile iron, and non-ferrous metals. Fits standard 3/8-inch tap holders and collet chucks accepting a 0.3810-inch shank diameter.

Installation Notes

A licensed machinist or qualified tooling technician should secure the workpiece fully before tapping operations begin. Always confirm spindle speed and feed rate are appropriate for the workpiece material before engaging the tap. Use an appropriate tapping fluid or cutting oil for the material being threaded to extend tool life and improve thread finish. Inspect the tap for wear or chipping before each use and remove it from service if thread tolerance cannot be maintained.