Hertel K010451AS25 Thread Forming Tap M3x0.5 Tin Hss

Product Description

The HERTEL K010451AS25 is a metric bottoming thread forming tap manufactured from high-speed steel with a titanium nitride (TiN) coating. Thread forming taps displace material rather than cutting it, producing stronger threads with no chip generation — a key advantage in blind hole applications. This tap is sized for M3x0.5 threads and carries a D5 thread limit. Overall length is 2.9375 inches with a thread length of 0.625 inches. The TiN coating extends tool life by reducing friction and improving wear resistance. Machinists and tool-and-die technicians use this tap in CNC machining centers, drill presses, and hand-tapping setups where clean, accurate metric internal threads are required.

This tap is suited for blind hole threading in ductile metals such as aluminum, mild steel, and similar machinable alloys. Its bottoming chamfer — 1 to 2 chamfered threads — allows threading to be taken very close to the bottom of a blind hole, maximizing thread engagement in shallow blind applications. It is appropriate for low-volume prototype work and production runs alike, with right-hand thread direction and a shank diameter of 0.141 inches to fit standard tap holders and chucks sized for the M3 range.

Key Features

• Thread forming (chipless) design produces stronger threads and eliminates chip removal in blind holes
• Bottoming chamfer (1-2P) allows threading to within 1-2 pitches of hole bottom
• High-speed steel construction provides toughness across a range of work materials
• Titanium nitride coating reduces friction, improves wear resistance, and extends tool life
• D5 thread limit for consistent thread fit in standard metric tolerance applications
• Right-hand thread direction, M3x0.5 metric standard

Compatibility

Designed as an OEM-style replacement or standard supply tap for M3x0.5 metric blind hole threading operations in machining and fabrication environments.

Installation Notes

This tap is installed by machinists and toolroom technicians using a standard tap wrench, tapping head, or CNC rigid tapping cycle. Ensure the tap holder matches the 0.141-inch shank diameter and square drive size. Apply appropriate cutting or forming fluid for the work material before tapping; forming taps require lubrication to prevent galling. Always verify hole diameter and depth per M3x0.5 thread forming tap drill charts before beginning the operation.