AWTools AW20254 HSS Threading Tap Set M4 x 0.70mm, 3-Piece

The AWTools AW20254 HSS Threading Tap Set is a professional-grade tool kit designed for creating precise M4 x 0.70mm metric threads. Crafted from high-speed steel (HSS M2) with a hardness rating of 65 HRC, these taps offer exceptional durability and consistent cutting performance. This 3-piece set is engineered to meet DIN352 standards, ensuring compatibility and accuracy for various metalworking tasks, whether you are cutting new threads or restoring damaged ones.

Advantages

The primary advantage of this set lies in its high-quality HSS M2 construction, which provides superior heat resistance and wear longevity during intensive use. The inclusion of three distinct tap types—taper, plug, and bottoming—allows for a complete threading process, from initial alignment to finishing the thread at the base of a blind hole. The compact design and included plastic storage case ensure that the tools remain organized and protected, making them a reliable choice for both professional workshops and home maintenance projects.

Suitable for

• Creating new metric M4 x 0.70mm threads in metal workpieces
• Repairing damaged or stripped internal threads
• Manual threading operations in workshops
• Maintenance and repair tasks requiring high precision

When it may not be suitable

This set is specifically designed for manual threading operations and may not be suitable for high-speed automated machine production or CNC applications. Additionally, it is intended for use on standard metals and may not perform optimally on hardened steels or exotic alloys that require specialized carbide tooling.

Key specifications

• Thread size: M4 x 0.70mm
• Material: HSS M2 high-speed steel
• Hardness: 65 HRC (+/- 1)
• Standard: DIN352
• Set composition: 1 taper tap, 1 plug tap, 1 bottoming tap
• Weight: 20 g

How to use

To use the AWTools threading tap set, first drill a pilot hole of the appropriate diameter for an M4 thread. Begin the process with the taper tap to ensure the thread starts square with the workpiece. Follow this with the plug tap to deepen the thread profile. Finally, use the bottoming tap if you need to extend the thread to the very bottom of a blind hole. Always use a suitable cutting oil to lubricate the tap and clear metal shavings frequently to prevent binding and ensure a clean finish.

What to consider before purchase

• Ensure the M4 x 0.70mm specification matches your project requirements
• Verify that the material you are threading is compatible with HSS M2 steel
• Confirm you have a compatible tap wrench for manual operation

Usage recommendations

Always clear metal chips from the flutes during the threading process to prevent the tap from breaking. Apply consistent pressure and rotate the tap slowly to maintain thread integrity.