Value Collection 156400004000004 Drill Countersink Sz4

Product Description

The VALUE COLLECTION 156400004000004 is a combination drill and countersink designed for creating pilot holes and countersunk seats in a single pass. Built from high-speed steel with a bright, uncoated finish, this tool accepts a 1/8 inch drill point and delivers a 60-degree included angle countersink profile. The 5/16 inch body diameter and 4 inch overall length make it well-suited for benchtop drill press work and hand-drill applications alike. It features a right-hand cut, plain cutting edge style, and a double end type, extending usable tool life. Machinists, pipefitters, and maintenance technicians will find it useful for screw preparation and deburring tasks across a range of materials.

This combo drill countersink is sized as a trade size 4 tool, rated for countersinking applications in sheet metal, structural steel, aluminum, and similar materials. The long-length designation provides additional reach for deeper work setups or awkward access angles. With no taper and no insertable cutter head, it operates as a solid, single-piece tool. It is not designed for aircraft-style countersinking. Typical use cases include screw seat preparation in fabrication shops, HVAC ductwork assembly, electrical enclosure work, and general mechanical maintenance.

Key Features

• High-speed steel construction for durability across ferrous and non-ferrous materials
• 60-degree included angle for standard countersunk fastener compatibility
• Double end type extends tool life by providing two usable cutting ends
• Right-hand cut, plain cutting edge style for smooth, consistent results
• Long-length tool design at 4 inches OAL for extended reach applications
• Bright, uncoated finish allows easy visual inspection of cutting edge condition

Compatibility

Designed as a standard trade size 4 combination drill countersink for use in drill presses and hand drills accepting 5/16 inch shank tooling. Suitable for countersinking applications as defined under UNSPSC code 23241603.

Installation Notes

This tool is installed and used by machinists, fabricators, and maintenance technicians. Secure the workpiece fully before drilling to prevent movement during the countersinking pass. Operate at appropriate spindle speeds for the material being cut and use cutting fluid when working with harder steels to preserve cutting edge life. Inspect both cutting ends before use and replace the tool when edges show visible wear or chipping.