RUKO HGB-III DIN 352 HSS 60° sada ručných závitníkov pre ľavý závit M4 x 0,70 mm

This RUKO hand tap set is the left-hand threading solution for M4 fasteners with a 0.70 mm pitch, made from high-speed steel to DIN 352. Unlike standard right-hand sets, this set cuts threads that tighten counter-clockwise, which is essential for rotating components where conventional threads would loosen.

Highlights

• Set of three taps: taper, plug, and bottoming
• Left-hand metric thread, M4 x 0.70 mm
• High-speed steel for durability
• DIN 352 geometry with 60° thread angle
• Square drive shank for secure tap wrench grip

In daily use

The taper tap starts the thread with a gradual lead, the plug tap continues it to medium depth, and the bottoming tap finishes close to the hole bottom. The bright finish reduces friction in common materials like unalloyed steels, cast iron, and non-ferrous metals. ISO 2 (6H) tolerance class ensures compatibility with standard left-hand nuts and bolts.

Full specifications

• Product type: Hand tap set
• Thread type: Metric (M)
• Thread direction: Left-hand
• Nominal thread diameter: 4 mm
• Thread pitch: 0.70 mm
• Thread standard: DIN 352
• Material: High-speed steel (HSS)
• Number of taps in set: 3 (taper, plug, bottoming)
• Thread angle: 60°
• Tolerance class: ISO 2 (6H)
• Shank type: Square drive
• Surface finish: Bright
• Total length: 45 mm
• Thread length: 15 mm
• Shank diameter: 3.0 mm
• Square drive size: 2.4 mm

Final note

For left-hand threading jobs, this set provides the full progression from starting to bottoming in one package.