kwb 443008 kierteitystappi M8 x 1,25 DIN 352 HSS

For machinists and maintenance technicians cutting internal threads in steel or non-ferrous metals, the kwb 443008 taper tap offers a precise M8 x 1.25 metric thread. The HSS construction holds an edge through repeated hand-tapping jobs.

Key specifications

• Thread size: M8 x 1.25
• Standard: DIN 352
• Material: HSS (high-speed steel)
• Type: Taper tap, hand tap
• Cutting direction: Right-hand
• Overall length: 70 mm
• Thread length: 22 mm
• Shank diameter: 6.0 mm
• Square drive: 4.9 mm

Why choose it

Straight flutes clear chips efficiently, and the bright finish resists corrosion in a workshop environment. The square drive fits standard tap wrenches for secure torque transfer.

Ideal use cases

• Pre-cutting internal threads in general-purpose steels
• Threading non-ferrous metals such as aluminium or brass
• Repairing damaged threads by hand

Good to know

As a taper tap, it has a pronounced lead-in chamfer that gradually forms the thread, reducing cutting force at the start. Use with a suitable cutting fluid for best results.