Greenlee DTAP3/8-16 Combination Drill Tap 3/8-16 Hss

Product Description

The GREENLEE DTAP3/8-16 is a combination drill tap that drills and taps a hole in a single operation, eliminating the need for separate drilling and tapping steps. Designed for 3/8-16 NC thread in left-hand direction with a right-hand flute configuration, it features a split drill point for fast penetration and reduced walking. The 1/4-inch hex shank provides positive engagement with quick-change chuck systems. Manufactured from high-speed steel, this two-flute tool handles steel, aluminum, and similar materials common in electrical and mechanical trade work. The overall length is 2.25 inches with a drill length of 2.25 inches.

This combination drill tap is suited for electricians, mechanical contractors, and fabricators who need to create tapped holes in sheet metal, enclosures, strut, and structural members without staging separate tools. The 3/8-16 thread size is a standard fastener thread widely used in conduit support hardware, panel mounting, and general mechanical assembly. The 1/4-inch hex shank makes it compatible with standard power drills, impact drivers with appropriate chuck adapters, and drill press setups used in trade fabrication work.

Key Features

• Drills and taps in a single pass, reducing setup time on repetitive hole operations
• Split drill point reduces thrust and prevents bit walk on smooth or coated surfaces
• Left-hand thread direction, 3/8-16 NC — verify thread requirement before ordering
• 1/4-inch hex shank fits quick-change and standard power tool chucks
• High-speed steel construction provides durability across common trade materials
• Two right-hand flutes provide chip clearance during combined drill-tap operation

Compatibility

Designed for use wherever a 3/8-16 NC left-hand tapped hole is required. Compatible with 1/4-inch hex chuck systems and standard drill press setups. Verify workpiece material hardness and thread direction specification prior to use.

Installation Notes

This tool is typically used by electricians and mechanical contractors using a power drill or drill press. Secure the workpiece firmly before operation to prevent movement during the combined drill-tap pass. Use appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Inspect the tool for wear between uses, as a dull combination drill tap can produce undersized threads or poor hole finish.