RUKO HGB-III DIN 352 HSS 60° M5 x 0.80 mm Left-Hand Hand Tap Set (3 Pieces)

For machinists and maintenance technicians who need to cut left-hand threads in unalloyed and low alloy steels, the RUKO HGB-III hand tap set provides a reliable solution. This three-piece set includes taper, plug, and bottoming taps, all precision-ground from high-speed steel (HSS) to DIN 352 standards. The taps feature a 60° flank angle and M5 x 0.80 mm metric coarse thread, ensuring accurate and clean threads in through-holes and blind holes.

Key specifications

• Thread type: Metric coarse, left-hand (LH)
• Thread size: M5 x 0.80 mm
• Standard: DIN 352
• Material: High-speed steel (HSS)
• Number of pieces: 3 (taper, plug, bottoming)
• Flank angle: 60°
• Tolerance class: ISO 2 (6H)
• Overall length: 50 mm
• Thread length: 16 mm
• Shank diameter: 4.0 mm
• Square drive size: 3.0 mm
• Recommended core hole diameter: 4.2 mm
• Surface finish: Bright (uncoated)

Why choose it

The set covers all stages of hand tapping: the taper tap starts the thread, the plug tap continues it, and the bottoming tap finishes threads close to the bottom of blind holes. HSS construction offers a good balance of hardness and toughness for general-purpose threading in steels.

Ideal use cases

• Creating left-hand threads in repair and maintenance work
• Threading in unalloyed and low alloy steels
• Workshop and manufacturing environments where manual tapping is required

Good to know

Left-hand threads are used in applications where rotation would loosen a right-hand thread, such as on certain rotating shafts or fasteners. The bright finish provides a clean surface and helps with chip evacuation during tapping.