RUKO HGB-DIN352-HSS-55° Hand Tap G 1/4 inch 19 TPI HSS DIN 352

For machinists and maintenance technicians threading Whitworth pipe threads in steel, cast iron, or non-ferrous metals, this RUKO hand tap delivers precise G 1/4" threads with a 55° flank angle. It is a single tap made from high-speed steel, bright finish, for manual thread cutting.

Key specifications

• Thread type: G (Whitworth pipe thread)
• Nominal thread size: G 1/4"
• Thread pitch: 19 TPI
• Flank angle: 55°
• Cutting direction: right-hand
• Number of flutes: 4
• Overall length: 63 mm
• Shank diameter: 8 mm
• Square drive: 6.3 mm
• Thread length: 20 mm
• Material: HSS (high-speed steel)
• Standard: DIN 352
• Surface treatment: bright (uncoated)
• Recommended core hole diameter: 11.4 mm

Why choose it

Its HSS construction ensures durability and wear resistance, while the bright finish reduces friction during cutting. The four flutes provide efficient chip evacuation, and the 55° flank angle is correct for Whitworth pipe threads, ensuring a proper fit.

Ideal use cases

• Creating internal G 1/4" pipe threads in workpieces
• Repairing or restoring damaged threads
• Maintenance work on pipe fittings and connections

Good to know

This tap is a single tap, meaning it cuts the thread to final size in one pass. It is suitable for unalloyed and low-alloyed steels, cast iron, and non-ferrous metals. Always use appropriate cutting fluid for best results.