Value Collection 00452417 Combination Drill Tap 1/4-20 Hss

Product Description

The VALUE COLLECTION 00452417 is a combination drill tap designed to drill and tap a 1/4-20 UNC thread in a single operation. Built from high-speed steel (HSS), it handles the drilling and threading steps simultaneously, reducing cycle time and tool changes on the bench or in the field. The 2-flute geometry provides efficient chip evacuation in through-hole and blind-hole applications. With an H3 thread limit, the tool produces threads in the mid-tolerance range suitable for standard fastener fits. The 0.208-inch drill diameter is sized to produce a properly formed 1/4-20 thread without a separate pilot drill step.

This combination drill tap is used in metalworking, mechanical assembly, HVAC equipment fabrication, electrical enclosure work, and general trade applications where 1/4-20 UNC tapped holes are required in steel, aluminum, or similar machinable materials. It is suited for hand tapping with a tap wrench or low-speed machine tapping. The 13/16-inch thread length accommodates standard fastener engagement depths for light- to medium-duty structural and equipment connections.

Key Features

• Drills and taps a 1/4-20 UNC hole in one pass, eliminating a separate drilling step
• H3 thread limit for mid-tolerance fits compatible with standard 1/4-20 fasteners
• High-speed steel construction provides hardness and wear resistance in ferrous and non-ferrous materials
• 2-flute design promotes chip clearance during cutting
• 0.208-inch drill diameter sized for proper 1/4-20 thread form
• 13/16-inch thread length suits standard fastener engagement depths

Compatibility

Designed for use in any application requiring a 1/4-20 UNC tapped hole in machinable materials. Compatible with standard tap wrenches and low-speed drill press or machine tapping setups that accept straight-shank combination drill taps.

Installation Notes

A licensed machinist or experienced trade professional should install this tool in a tap wrench or appropriately rated low-speed machine spindle. Always use cutting fluid appropriate for the workpiece material to extend tool life and improve thread quality. Secure the workpiece firmly before starting the cut, and back off periodically to break chips and clear flutes. Do not force the tool — excessive torque will break high-speed steel combination taps.