Accupro T1640487 Spiral Point Tap 3/8-16 Vanadium Hss

Product Description

The ACCUPRO T1640487 is a spiral point tap designed for cutting 3/8-16 unified coarse threads in through-hole applications. Built from HSS-E vanadium high speed steel with an oxide finish, it delivers consistent thread quality in ferrous metals, steel alloys, and similar materials. The plug chamfer distributes cutting load gradually at entry, reducing tap breakage on production and repair work. With 3 flutes and a right-hand thread direction, this tap is suited for general-purpose machine tapping on drill presses, CNC machining centers, and tapping heads used by machinists and maintenance technicians across manufacturing and industrial service environments.

This tap is well suited for through-hole tapping in medium-to-hard materials where chips can be pushed forward and cleared ahead of the tap. The 3/8-16 UNC thread specification is one of the most common fastener thread sizes in North American trade work, making this tap a standard item for machine shops, fabrication facilities, and industrial maintenance operations. The plug chamfer style works across a range of material thicknesses and is the most versatile chamfer option for general tapping tasks.

Key Features

• HSS-E vanadium construction for improved wear resistance and toughness over standard HSS
• Oxide finish reduces friction and provides mild corrosion resistance during storage and use
• Plug chamfer distributes cutting load over the first several threads for controlled entry
• Right-hand thread direction matches standard 3/8-16 UNC fastener specifications
• H7 thread limit provides controlled oversize tolerance for plated or close-fit applications
• No coolant-through design simplifies tooling setup for standard tapping operations

Compatibility

Designed for use in standard tapping chucks, tapping heads, and CNC tool holders that accept straight-shank taps with a 0.381-inch shank diameter, for cutting 3/8-16 UNC right-hand threads in through-hole configurations.

Installation Notes

Tapping operations should be performed by qualified machinists or maintenance technicians familiar with speeds, feeds, and proper tap alignment for the material being threaded. Always ensure the workpiece is securely fixtured and the tapping spindle is properly aligned before starting the cut. Use an appropriate cutting fluid or tapping compound for the material being threaded to extend tap life and improve thread finish. Inspect the tap for wear or chipping before each use and replace if damage is observed.