RUKO HGB Set 2-Piece DIN 2181 Metric Fine Hand Tap Set M20 x 1.0 mm HSS

Cutting precise metric fine threads by hand in tough materials demands a tap set that stays sharp and aligns true. The RUKO HGB Set 2-Piece DIN 2181 MF20 x 1.0 mm provides a matched taper and plug tap made from high-speed steel, so you can produce accurate M20 x 1.0 threads in unalloyed and alloyed steels up to 800 N/mm², cast iron, and non-ferrous metals.

Who is it for

This set is for machinists, maintenance technicians, and metalworkers who need reliable hand tapping for through holes and blind holes where thread accuracy and tool life matter.

Main features

• Two-piece set: taper tap for starting threads and plug tap for finishing to full depth.
• Metric fine thread M20 x 1.0 mm to DIN 2181, tolerance class ISO 2 (6H).
• High-speed steel (HSS) with bright finish for good wear resistance and chip flow.
• Straight flutes, 4 flutes, square shank for use with a standard tap wrench.
• Right-hand thread direction for conventional clockwise tapping.
• Recommended pre-drill diameter: 19.0 mm.

Specifications

• Thread type: Metric Fine (MF)
• Nominal diameter: 20 mm
• Pitch: 1.0 mm
• Standard: DIN 2181
• Material: High-Speed Steel (HSS)
• Set composition: 2-piece set (Taper Tap, Plug Tap)
• Thread direction: Right-hand thread
• Tolerance class: ISO 2 (6H)
• Surface treatment: Bright (uncoated)
• Shank type: Square shank
• Drive type: Manual (Tap Wrench)
• Number of flutes: 4
• Flute geometry: Straight flutes
• Recommended pre-drill diameter: 19.0 mm
• Application: General purpose hand tapping
• Suitable materials: Unalloyed and alloyed steels up to 800 N/mm², cast iron, non-ferrous metals

Tips

Use a suitable cutting fluid when tapping steel to extend tool life and improve thread finish. Ensure the tap is aligned perpendicular to the workpiece and reverse periodically to break chips, especially in blind holes.