Kennametal 1541592 Spiral Point Tap 8-32 Unc Hss

Product Description

The KENNAMETAL 1541592 is a spiral point tap designed for threading 8-32 UNC holes in production and maintenance machining environments. Built from high speed steel (HSS) with a bright uncoated finish, this plug-chamfer tap drives chips forward through the hole as it cuts, making it well suited for through-hole tapping operations. It features a 2-flute geometry and an H2 thread limit, which controls the tolerance of the finished thread to meet 3B class of fit requirements. Overall length is 2.125 inches with a thread length of 0.75 inches.

This tap is appropriate for use in through-hole tapping applications across a range of materials including cast iron, ductile iron, and non-ferrous metals. It is commonly used in job shop, maintenance, and light production settings where right-hand 8-32 UNC threads are required. The plug chamfer (3-5 thread lead) makes it suitable for starting in a hole without requiring a taper tap first. It belongs to the KENNAMETAL Series 5301 tap line.

Key Features

• Spiral point geometry pushes chips ahead of the tap for clean through-hole threading
• H2 thread limit controls thread tolerance to 3B class of fit specifications
• High speed steel construction provides durability across cast iron, ductile iron, and non-ferrous metal applications
• Plug chamfer (3-5 thread lead) allows starting without a taper tap
• Bright uncoated finish — no coating variability to affect thread tolerance
• Right-hand cut, 2-flute design for standard machine tapping setups

Compatibility

Designed for through-hole tapping of 8-32 UNC threads in cast iron, ductile iron, and non-ferrous metal workpieces. Suitable for use with standard tapping heads, CNC machining centers, and drill presses equipped for right-hand tapping.

Installation Notes

Tapping operations should be performed by a machinist or qualified technician with appropriate machine tooling. Ensure spindle speed and feed rate are appropriate for the workpiece material and tap size before starting the cut. Use a compatible tapping fluid or cutting oil rated for the workpiece material to extend tap life and maintain thread quality. Inspect the tap for wear or chipping before each use — a damaged tap can produce out-of-tolerance threads or break in the workpiece.