Value Collection MSC-04911202 Straight Flute Tap 5/16-18 Unc

Product Description

The VALUE COLLECTION MSC-04911202 is a straight flute tap designed to cut 5/16-18 UNC internal threads in a left-hand direction. Built from high-speed steel (HSS) with a bright/uncoated finish, this tap delivers reliable thread cutting in a range of metalworking and maintenance applications. The taper chamfer eases entry into the workpiece and progressively distributes cutting load across multiple teeth. With 4 flutes and an H3 thread limit, it holds dimensional accuracy for 3B class-of-fit threads. Overall length is 2-23/32 inches with a 1 inch thread length. Licensed machinists, tool-and-die makers, and maintenance mechanics are the primary installers.

This tap is suited for threading operations in job shops, production facilities, and maintenance environments where left-hand threaded fasteners are required. Left-hand taps are commonly used to prevent loosening on rotating shafts, counterclockwise assemblies, and specialized mechanical components. The taper chamfer style makes it a first-choice tap when starting a thread from scratch in a through-hole or when a plug or bottoming tap will finish the hole. It is intended for use in a hand tap wrench, tapping fixture, or manual machine setup.

Key Features

• Left-hand thread direction for counterclockwise thread applications
• Taper chamfer distributes cutting load for easier thread starting
• H3 thread limit maintains 3B class-of-fit dimensional tolerance
• 4-flute design provides good chip control in a range of materials
• High-speed steel construction offers durability across general-purpose cutting
• Bright/uncoated finish suitable for standard threading operations

Compatibility

Designed as an OEM-style replacement or direct substitute for standard 5/16-18 UNC straight flute taps used in general metalworking, maintenance, and manufacturing threading applications.

Installation Notes

This tap should be installed by a qualified machinist or maintenance mechanic familiar with thread-cutting procedures. Always de-energize and lock out any powered equipment before performing tapping operations on a mounted workpiece. Use the appropriate cutting fluid for the material being tapped to extend tap life and improve thread finish. Do not force the tap; back off periodically to break chips and prevent tap breakage.