RUKO HGB-III DIN 352 HSS 60° M12 x 1.75 mm Left-Hand Hand Tap

Precision left-hand threading with a 60° flank angle and 6H tolerance class, crafted from high-speed steel to DIN 352.

Overview

The RUKO HGB-III hand tap produces metric ISO threads to DIN 352. It cuts a left-hand M12 x 1.75 mm thread with a 60° flank angle and 6H tolerance. The tap is made of bright-finished high-speed steel (HSS) and has three straight flutes for efficient chip evacuation. The square drive shank (9.0 mm diameter, 7.0 mm square) fits standard tap wrenches.

What stands out

• Left-hand thread direction for reverse-threaded applications
• HSS construction for durability and wear resistance
• Straight flute geometry with three flutes for smooth hand tapping
• Bright surface finish for corrosion resistance and clean threads

Technical details

• Thread standard: Metric ISO Thread
• Thread size: M12
• Thread pitch: 1.75 mm
• Thread direction: Left-hand
• Manufacturing standard: DIN 352
• Material: High-speed steel (HSS)
• Flank angle: 60°
• Tolerance class: 6H
• Shank type: Square drive
• Shank diameter: 9.0 mm
• Square drive size: 7.0 mm
• Overall length: 110 mm
• Thread length: 29 mm
• Number of flutes: 3
• Cutting edge geometry: Straight flute
• Recommended pre-drill diameter: 10.25 mm

Our verdict

A reliable left-hand tap for creating precise M12 threads in through or blind holes when used with the correct pre-drill size.