RUKO HGB-II DIN 352 HSS-E 60° M18 x 2.50 mm Left-Hand Machine Tap

Machinists and maintenance technicians working with left-hand threaded holes in steel, cast iron, or non-ferrous metals will appreciate the RUKO HGB-II DIN 352 HSS-E 60° M18 x 2.50 mm left-hand machine tap. This single hand tap is manufactured from high-speed steel with cobalt (HSS-E) for enhanced wear resistance and heat tolerance, making it suitable for general-purpose threading in through and blind holes.

Key specifications

• Thread size: M18 x 2.50 mm, left-hand
• Thread standard: ISO Metric (DIN 13), tolerance class ISO 2 (6H)
• Manufacturing standard: DIN 352
• Flank angle: 60°
• Tool material: HSS-E (high-speed steel with cobalt)
• Overall length: 110 mm
• Thread length: 35 mm
• Shank diameter: 14.0 mm
• Square drive size: 11.0 mm
• Number of flutes: 4, straight flute geometry
• Surface treatment: bright (uncoated)

Why choose it

The HSS-E material with cobalt provides better hot hardness than standard HSS, allowing higher cutting speeds and longer tool life when tapping tough materials. The straight flute design efficiently evacuates chips in both through and blind holes, while the precise ISO 2 (6H) tolerance class ensures consistently accurate threads.

Ideal use cases

• Creating left-hand threaded holes in steel, cast iron, and non-ferrous metals
• General-purpose tapping in maintenance, repair, and production environments
• Applications requiring a single hand tap for manual or machine tapping

Good to know

This tap is designed for left-hand threads, which are used in applications where rotational forces could loosen a right-hand fastener, such as on rotating shafts or certain automotive components. It conforms to DIN 352, the German standard for hand taps.