Hertel K007105AS Hand Sti Tap 2-56 Unc H1 3 Flutes

Product Description

The HERTEL K007105AS is a hand STI tap designed for cutting Screw Thread Insert (STI) threads in a 2-56 UNC configuration. STI taps produce oversize threads sized to accept helical thread inserts, restoring or reinforcing threaded holes in softer base materials. This tap features a bottoming chamfer, allowing threads to be cut close to the bottom of a blind hole. Made from high speed steel with a bright finish, it measures 1.875 inches overall length with a 0.5625-inch thread length. It is a standard bench tool used by machinists, maintenance technicians, and tool-and-die professionals working on precision fastening applications.

This tap is suited for hand tapping operations where STI thread inserts are required in 2-56 UNC threaded holes. Common applications include repairing stripped threads in aluminum, magnesium, or other materials where insert reinforcement is needed. The H1 thread limit designates a tight tolerance, making this tap appropriate for controlled-fit threading in close-tolerance assemblies. The bottoming chamfer style is selected when threads must extend to the full depth of shallow or blind holes.

Key Features

• Bottoming chamfer allows threading to the base of blind holes
• H1 thread limit provides tight tolerance control for precision fits
• STI thread form produces oversize threads sized for helical thread inserts
• High speed steel construction for durability in general-purpose tapping
• 3-flute design supports chip clearance in through and blind hole applications
• Bright finish with no coating for straightforward inspection and use

Compatibility

Designed as an OEM-style hand tap for use with 2-56 UNC STI helical thread insert applications in standard bench or hand tapping setups.

Installation Notes

This tap is installed by hand using a standard tap wrench. Ensure the workpiece is securely fixtured before beginning. Apply cutting fluid appropriate to the base material to reduce wear and improve thread finish. Follow standard tapping practice by reversing the tap periodically to break chips and prevent binding in blind holes.