Value Collection MSC-04919163 Straight Flute Tap 1-14 Uns

Product Description

The VALUE COLLECTION MSC-04919163 is a straight flute tap designed for cutting 1-14 UNS internal threads in a left-hand direction. Built from high-speed steel with a bright uncoated finish, it delivers reliable performance in threading operations where standard spiral-flute geometry is not required. The taper chamfer eases entry into the workpiece and distributes cutting load across the leading threads. With a thread length of 2.5 inches and an overall length of 5.125 inches, this tap suits deep threading applications on the bench or in a manual tapping setup. It is used by machinists and tooling technicians working to a 3B class of fit with an H4 thread limit.

This tap is suited for threading through-holes or blind holes requiring a 1-14 UNS left-hand thread form. The 3B class of fit makes it appropriate for standard tolerance threaded assemblies where a controlled clearance fit is specified. The taper chamfer style with 4 flutes works well in materials that produce broken or short chips, including many steels and cast iron. It is commonly used in manual tapping, low-speed machine tapping, and repair threading work in industrial and maintenance environments.

Key Features

• 1-14 UNS thread form with left-hand thread direction for reverse-threaded applications
• Taper chamfer distributes cutting forces over multiple leading threads for smooth entry
• High-speed steel construction provides durability across a range of workpiece materials
• 4-flute straight flute design handles short-chipping materials effectively
• H4 thread limit and 3B class of fit for controlled tolerance threaded assemblies
• Bright uncoated finish suitable for use with cutting oils and standard tapping fluids

Compatibility

Designed as a standard replacement or tooling addition for any setup requiring a 1-14 UNS left-hand straight flute taper tap with a 3B class of fit and H4 thread limit.

Installation Notes

This tap is installed and operated by machinists or tooling technicians using a tap wrench, T-handle, or low-speed tapping machine. Secure the workpiece fully before tapping and apply appropriate cutting fluid throughout the operation to reduce heat and extend tool life. Because this is a left-hand thread tap, the cutting direction is counterclockwise — confirm thread direction requirements before use. Inspect the tap for wear or chipping before each use and discard any tap that shows signs of damage to avoid thread damage in the workpiece.