Kennametal 1540369 Spiral Point Tap 3-48 Unc Hss

Product Description

The KENNAMETAL 1540369 is a spiral point plug tap designed for cutting internal threads in through-hole applications. Built from high speed steel with a bright uncoated finish, this tap is sized for 3-48 UNC threads and produces right-hand threads with a 2B class of fit. The H2 thread limit provides consistent tolerance control for standard fastener fits. With a 2-flute spiral point geometry, the tap pushes chips forward ahead of the cutting zone, keeping the flutes clear during operation. Overall length is 1.8125 inches with a thread length of 0.5 inches. It is suited for manual or machine tapping in low-volume and production environments.

This tap is rated for use in cast iron, ductile iron, and non-ferrous metals, making it a practical choice for general machine shop, maintenance, and repair work. The plug chamfer style — typically 3 to 5 threads of lead — requires a through-hole for proper chip evacuation. It is well matched for tapping operations on CNC machines, drill presses, or tapping arms where axial control is maintained. Series 5301 identifies this as part of a standard HSS tap family from KENNAMETAL, consistent with catalog stock tooling.

Key Features

• Spiral point geometry pushes chips forward, suited for through-hole tapping
• High speed steel construction for durability across cast iron and non-ferrous materials
• H2 thread limit for consistent 2B class of fit tolerancing
• Bright uncoated finish — no added coating buildup to affect thread tolerance
• Plug chamfer provides progressive thread engagement for machine tapping
• Right-hand thread direction, 2-flute design

Compatibility

Designed as a direct-fit replacement or standard tooling selection for 3-48 UNC through-hole tapping operations in cast iron, ductile iron, and non-ferrous metal workpieces where a 2B class of fit is required.

Installation Notes

Installation of taps should be performed by a qualified machinist following standard shop safety procedures. Secure the workpiece and ensure proper alignment before engaging the tap to avoid breakage. Use appropriate cutting fluid for the workpiece material to extend tool life. Always power down and de-energize any machine tool before changing or setting tooling.