Hertel K008927AS Tap Set 7/16-14 Unc 4 Flute Hss

Product Description

The HERTEL K008927AS is a 3-piece tap set designed for cutting 7/16-14 UNC internal threads in metal workpieces. Each tap is manufactured from high speed steel with a bright finish and features 4 flutes for efficient chip evacuation during threading operations. The overall length of each tap is 3-5/32 inches. The set covers a 2B and 3B class of fit, making it appropriate for standard and close-tolerance threaded fastener applications. Machinists and maintenance technicians use sets like this for hand tapping or low-speed machine tapping where a complete progression through taper, plug, and bottoming geometry is required.

This tap set is suited for threading operations in ferrous and non-ferrous metals in both production and maintenance environments. The 7/16-14 UNC thread form is one of the most common unified coarse thread sizes, appearing in structural fasteners, equipment frames, and mechanical assemblies across industrial, commercial, and general manufacturing settings. The H3 thread limit designation indicates the tap is ground to a tolerance class appropriate for standard-fit threaded holes.

Key Features

• 7/16-14 UNC thread form for one of the most widely used coarse-thread fastener sizes
• High speed steel construction provides durability across a range of metal cutting applications
• 4-flute geometry supports chip evacuation and stable cutting action
• Bright finish with no coating for straightforward inspection and standard lubrication compatibility
• H3 thread limit ground for consistent tolerance control on 2B and 3B class-of-fit holes
• 3-piece set provides taper, plug, and bottoming progression for through and blind hole threading

Compatibility

Designed for cutting 7/16-14 UNC threads in standard threading applications where a 2B or 3B class of fit is specified. Suitable for use with standard tap wrenches and low-speed tapping machines compatible with this tap shank size.

Installation Notes

Threading operations should be performed by a qualified machinist or maintenance technician familiar with proper tap drill sizing and cutting fluid use. Always use the correct tap drill size for a 7/16-14 UNC thread before starting the tap to avoid overloading the flutes. Secure the workpiece firmly and apply cutting fluid appropriate for the base material throughout the operation. Reverse the tap periodically to break chips and prevent tap breakage, especially in deeper or blind holes.