RUKO HGB set DIN 352 HSS-Co 60° M20 x 2.50 handdraadtapset

In a busy metalworking shop, a machinist reaches for the RUKO HGB hand tap set to cut precise M20 coarse threads into a steel component. The set includes three taps—taper, second, and finish—each made from high-speed steel with cobalt for durability and heat resistance. The 60° thread flank angle and DIN 352 standard ensure consistent, accurate threads in through and blind holes.

Key specifications

• Thread size: M20 x 2.50 mm (metric coarse)
• Standard: DIN 352
• Material: HSS-Co (high-speed steel with cobalt)
• Number of pieces: 3 (taper, second, finish)
• Thread flank angle: 60°
• Tolerance class: ISO 2 (6H)
• Cutting direction: right-hand
• Suitable for: unalloyed and alloyed steels, cast iron, non-ferrous metals
• Max. tensile strength: up to 1000 N/mm²
• Recommended core hole diameter: 17.5 mm
• Shank type: square drive (DIN 10)
• Surface finish: bright (uncoated)
• Packaging: plastic box

Why choose it

The cobalt alloy in HSS-Co provides better heat resistance and longer tool life compared to standard HSS, making this set suitable for professional and industrial applications. The three-piece design allows for gradual thread cutting, reducing the risk of tap breakage and improving thread quality.

Ideal use cases

• Manual tapping of through and blind holes in steel and cast iron
• Maintenance and repair work in workshops
• Production of threaded holes in non-ferrous metals

Good to know

The taps are supplied in a plastic box for organized storage. Always use cutting oil when tapping to extend tool life and achieve clean threads.