Value Collection MSC-04425427 Straight Flute Tap 5-40 Unc

Product Description

The VALUE COLLECTION MSC-04425427 is a straight flute tap designed for cutting 5-40 UNC internal threads in a wide range of materials. Built from high-speed steel with a bright, uncoated finish, it delivers reliable performance in standard threading applications. The tap features a taper chamfer for gradual thread engagement at the start of the cut, reducing the load on entry. With 3 flutes and an H2 thread limit, it holds close tolerances and suits both 2B and 3B class-of-fit requirements. Overall length is 1-15/16 inches, with a thread length of 5/8 inches. Sold individually, it is well suited for machine shop, maintenance, and production threading tasks.

This tap is intended for threading #5-40 UNC holes in through-hole or short blind-hole applications where chip evacuation is manageable. The straight flute geometry works best in materials that produce broken chips, such as cast iron, brass, and free-machining steels. The taper chamfer distributes cutting forces across the first several threads, making it appropriate for use in drill presses, tapping machines, and CNC machining centers, as well as hand tapping with a tap wrench. Right-hand thread direction is standard for the vast majority of fastener applications in these size ranges.

Key Features

• 5-40 UNC thread form, right-hand direction, H2 thread limit for precise tolerance control
• Taper chamfer distributes cutting load across entry threads for smoother starts
• 3-flute straight design suits brittle and free-machining materials that produce broken chips
• High-speed steel construction provides good wear resistance at standard cutting speeds
• Bright uncoated finish — compatible with a wide range of cutting fluids
• Compact 1-15/16 inch overall length fits standard tap holders and collets

Compatibility

Designed as a standard replacement or production tap for 5-40 UNC threading operations. Fits standard tap holders and collets accepting straight-shank taps of this size class.

Installation Notes

This tap is installed and operated by machinists, toolmakers, and maintenance technicians. Always secure the workpiece and ensure the tap is properly aligned with the drilled hole before starting the cut to prevent tap breakage. Apply an appropriate cutting fluid for the workpiece material throughout the tapping operation. When hand tapping, reverse the tap periodically to break chips and clear flutes.