Value Collection MSC-04919155 Straight Flute Tap 1-14 Uns

Product Description

The VALUE COLLECTION MSC-04919155 is a straight flute bottoming tap designed for cutting internal 1-14 UNS left-hand threads in blind and through holes. Built from high-speed steel with a bright/uncoated finish, it delivers reliable thread-forming performance in ferrous and non-ferrous materials. The bottoming chamfer allows threading close to the bottom of a blind hole, making it the right choice when full thread depth is required near the base of a bore. With 4 flutes and an H4 thread limit, this tap is suited for machinists and tooling professionals working to tight tolerances on Class 3B fits.

This tap is used in manual and machine tapping operations where a left-hand thread specification is required. The 1-14 UNS thread form is common in specialized industrial, mechanical, and tooling applications. It is appropriate for use in drill press, lathe, or tapping machine setups, and is also suitable for hand tapping when proper alignment fixtures are used. Machinists working on repair, production, or custom fabrication jobs will find this tap fits standard tap wrench drives for its size range.

Key Features

• Bottoming chamfer allows threading to within 1-2 threads of the bottom of a blind hole
• Left-hand thread direction for applications requiring reverse-thread fastening
• High-speed steel construction provides wear resistance across a broad range of workpiece materials
• H4 thread limit ensures compatibility with Class 3B close-tolerance fits
• 4-flute design offers chip clearance and stability during the cut
• Bright/uncoated finish suitable for use with standard cutting fluids

Compatibility

Designed for cutting 1-14 UNS Class 3B left-hand internal threads. Fits standard tap holders and tap wrenches sized for 1-inch taps. No specific OEM system compatibility is stated for this tool.

Installation Notes

This tap should be installed in a rigid tap holder or used with a tapping guide to maintain axial alignment and prevent thread runout. Always apply appropriate cutting fluid for the workpiece material before and during tapping. Ensure the drilled hole diameter matches the correct tap drill size for 1-14 UNS threads before starting. Left-hand taps require counter-clockwise rotation to advance the thread — confirm setup direction before powering any machine tap drive.