Hertel K008389AS Spiral Point Tap 5/16-18 Unc 2 Flutes

Product Description

The HERTEL K008389AS is a spiral point tap designed for cutting 5/16-18 UNC threads in through-hole applications. Built from high-speed steel with a bright uncoated finish, this plug chamfer tap drives chips forward ahead of the cutting zone, keeping the flutes clear during production drilling operations. The 2-flute design suits machine tapping in a range of materials where chip evacuation is the primary concern. At 0.2 pounds, it is a compact tool intended for use in drill presses, CNC machining centers, and tapping machines across metal fabrication, mechanical assembly, and maintenance applications.

This tap is suited for through-hole threading in ferrous and non-ferrous metals in both shop and field settings. The plug chamfer provides a gradual lead-in, making it appropriate for general-purpose production tapping where a starting taper is not required and a bottoming chamfer is not needed. Machinists, maintenance technicians, and tool-and-die workers will find this tap applicable to standard 5/16-18 UNC fastener preparation work in manufacturing and repair environments.

Key Features

• Spiral point design pushes chips forward for efficient through-hole tapping
• 5/16-18 UNC thread form with right-hand thread direction
• Plug chamfer for general-purpose lead-in without a full taper
• High-speed steel construction for wear resistance in standard machining materials
• H1 thread limit for close-tolerance thread production
• Bright uncoated finish suitable for use with standard cutting fluids

Compatibility

Designed as a standard replacement or production spiral point tap for 5/16-18 UNC through-hole threading operations compatible with common drill presses, CNC tapping heads, and hand tapping machines that accept straight-shank taps with a 0.3180-inch shank diameter.

Installation Notes

This tap is installed and operated by qualified machinists or maintenance technicians familiar with threading operations. Ensure the workpiece is securely clamped and the spindle speed is set appropriately for the material being tapped before engaging the tap. Apply a suitable cutting fluid or tapping compound to extend tool life and improve thread quality. Inspect the tap for wear or chipping before each use, as a damaged tap can destroy the workpiece thread or break in the hole.