Greenlee DTAPM3C Combo Drill Tap M3x0.5 High Speed Steel

Product Description

The GREENLEE DTAPM3C is a combination drill tap designed to drill and tap a hole in a single operation, eliminating the need to switch between separate tools. Built from high-speed steel (HSS), it handles the demands of metal fabrication, mechanical assembly, and electrical enclosure work. The M3x0.5 thread size and 0.25-inch shank diameter make it compatible with standard drill chucks. A split drill point promotes accurate entry and reduces walking on the workpiece surface. Electricians, HVAC technicians, and mechanical contractors reach for combination drill taps when threading small-diameter holes in sheet metal, control panels, or structural brackets.

This tool is suited for threading M3x0.5 holes in light-gauge steel, aluminum, and similar materials commonly encountered in electrical, HVAC, and general mechanical trade work. It is particularly useful when working in confined spaces or on production runs where speed and hole quality matter. The single-tool drilling and tapping process reduces setup time and minimizes the risk of misalignment between the drilled hole and the tapped thread.

Key Features

• Combination drill and tap in one tool — drills and threads in a single pass
• M3x0.5 thread form for small-fastener applications in metal
• High-speed steel construction for durability across ferrous and non-ferrous materials
• Split drill point for accurate, walk-free entry without center-punching
• 0.25-inch shank diameter fits standard keyed and keyless drill chucks

Compatibility

Designed for use with standard drill drivers and drill presses accepting a 0.25-inch round shank, suitable for M3x0.5 threading applications in light-gauge metal.

Installation Notes

A licensed electrician or qualified mechanical technician typically installs tapped hardware using combination drill taps in compliance with applicable trade codes. Secure the workpiece firmly before drilling to prevent movement. Use appropriate cutting fluid or tapping compound on ferrous metals to extend tool life and improve thread quality. Do not exceed the recommended RPM range for the material being tapped, as overheating will reduce tool life and thread accuracy.