Value Collection DT22HEX-5/16-18 Combination Drill Tap

Product Description

The VALUE COLLECTION DT22HEX-5/16-18 is a combination drill tap that drills and taps a 5/16-18 thread in a single operation. Made from high-molybdenum high-speed steel with a gold coating, it delivers strong wear resistance and heat tolerance for use in steel, cast iron, and similar ferrous materials. The 135-degree split drill point reduces thrust and improves centering without a pilot hole. With 2 flutes and a 15/16-inch thread length, it cuts clean, accurate threads in one pass, reducing cycle time for machinists, maintenance techs, and fabricators working on production or repair applications.

This combination drill tap is suited for machine shop, maintenance, and light fabrication environments where drilling and tapping separate operations adds time or fixture complexity. It fits standard tap handles and machine setups configured for 5/16-18 UNC threads. The 3.25-inch overall length accommodates standard chuck clearance in drill presses and CNC setups. It is appropriate for use in metals where high-speed steel tooling is rated, particularly low-to-medium carbon steels and softer alloys.

Key Features

• Combines drilling and tapping into a single operation, reducing setup and cycle time
• High-molybdenum high-speed steel construction for improved heat and wear resistance
• 135-degree split drill point for self-centering entry without a pilot hole
• Gold coating reduces friction and extends tool life in ferrous materials
• 2-flute design promotes chip clearance during through-hole and blind-hole tapping
• 5/16-18 UNC thread form for standard fastener applications

Compatibility

Designed for use with standard drill press chucks, CNC machining centers, and tapping heads configured for 5/16-18 UNC thread applications in ferrous and compatible materials.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician familiar with combination drill-tap tooling. Secure the workpiece firmly before beginning the operation and use appropriate cutting fluid for the material being machined. Match spindle speed to the manufacturer recommendations for the material and tool diameter. Never back-drive the tool without confirming the setup is rated for reversible tapping to avoid thread damage or tool breakage.