Hertel G837631 Extension Tap 8-32 2 Flute H3 Spiral Point

Product Description

The HERTEL G837631 is a spiral point plug extension tap designed for cutting internal 8-32 UNC threads in through-hole applications. Built from high speed steel with a bright, uncoated finish, this tap delivers consistent thread form across production and maintenance environments. The spiral point geometry pushes chips forward ahead of the cutting edge, reducing clogging and allowing reliable performance in through-hole work. At 4 inches overall length, the extended reach makes it well suited for threading recessed or hard-to-access bores where standard-length taps cannot engage. The H3 thread limit and 2B class of fit ensure dimensional accuracy within standard tolerance requirements for 8-32 fastener assemblies.

This extension tap is used in metalworking applications where 8-32 UNC threaded holes are required in steel, aluminum, or similar machinable materials. The plug chamfer, with its gradual lead-in, is the standard choice for through-hole tapping in production machining, maintenance and repair operations, and general fabrication. The 2-flute configuration provides adequate chip clearance for soft to medium-hardness metals. Machinists, tool and die workers, and maintenance technicians working on assemblies requiring 8-32 fastener points will find this tap appropriate for both CNC and hand-tapping operations.

Key Features

• Spiral point geometry pushes chips forward for clean through-hole threading
• Plug chamfer provides gradual lead-in for standard through-hole applications
• H3 thread limit with 2B class of fit for accurate 8-32 UNC thread production
• 4 inch overall length for extended reach into recessed or deep features
• High speed steel construction handles a wide range of machinable metals
• Bright, uncoated finish suitable for use with standard cutting fluids

Compatibility

Designed for cutting 8-32 UNC internal threads in through-hole configurations across general metalworking and maintenance applications.

Installation Notes

This tap is installed and operated by machinists or maintenance technicians using a tap wrench, tapping head, or CNC tapping cycle. Always apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. Ensure the tap is properly aligned with the bore centerline before applying torque to prevent tap breakage. Secure the workpiece firmly before tapping operations begin.