Value Collection 00452425 Drill Tap 5/16-18 H3 Hss

Product Description

The VALUE COLLECTION 00452425 is a combination drill tap designed to drill and tap a hole in a single operation, eliminating the need for separate drilling and tapping steps. Built from high-speed steel (HSS), it handles the 5/16-18 UNC thread size with an H3 thread limit for consistent tolerance control. The drill diameter measures 0.266 inches, the thread length is 31/32 inches, and the overall length is 2-27/32 inches. With 2 flutes, it clears chips efficiently during the combined drilling and tapping pass. Machinists, maintenance technicians, and metalworking tradespeople install this tool in standard drill presses, CNC machines, or hand-held power drills where production efficiency matters.

This combination drill tap is suited for general metalworking applications requiring 5/16-18 UNC threaded holes in steel, aluminum, and similar materials. It is a practical choice for production environments, maintenance and repair operations, and fabrication shops where reducing tool changes and cycle time is a priority. The H3 thread limit makes it appropriate for standard tolerance Class 2B fits commonly specified in commercial fastening applications.

Key Features

• Drills and taps in one pass, reducing setup time and tool changes
• 5/16-18 UNC thread size with H3 thread limit for standard Class 2B tolerance fits
• High-speed steel construction provides durability and heat resistance
• 0.266-inch drill diameter matched to 5/16-18 thread requirements
• 2-flute design promotes chip evacuation during combined operations
• 31/32-inch thread length suits typical fastener engagement depths

Compatibility

Designed as a standard combination drill tap for use in applications requiring 5/16-18 UNC threaded holes; compatible with drill presses, CNC machining centers, and power drills accepting appropriately sized toolholders or chucks.

Installation Notes

A licensed machinist or qualified technician should select appropriate cutting speed and feed rate for the workpiece material before use. Secure the workpiece firmly and use cutting fluid to extend tool life and improve thread quality. Inspect the tool for wear or chipping before each use, as a damaged cutting edge will produce out-of-tolerance threads. Follow applicable shop safety standards and machine guarding requirements during operation.