RUKO HGB DIN 5157 HSS 55° Rp 1-3/4 Pipe Tap

For plumbers and pipe fitters cutting internal parallel pipe threads in steel, stainless steel, and non-ferrous metals, the RUKO HGB-DIN5157-HSS-55°-Rp-1-3/4 is a precision ground pipe tap. It produces G 1-3/4 inch parallel threads per DIN 5157 with a 55° flank angle, right-hand cutting, and 11 threads per inch.

Key specifications

• Tool type: Pipe tap
• Thread standard: DIN 5157
• Thread type: Rp (British Standard Pipe Parallel)
• Nominal thread size: 1-3/4 inch
• Thread pitch: 11 TPI
• Thread flank angle: 55°
• Thread direction: Right-hand
• Material: High-speed steel (HSS)
• Number of flutes: 4
• Overall length: 180 mm
• Thread length: 60 mm
• Shank diameter: 30 mm
• Square drive size: 24 mm
• Recommended core hole diameter: 57.5 mm

Why choose it

The HSS construction provides high wear resistance and heat tolerance, allowing the tap to maintain sharp cutting edges over repeated use. Its 4-flute design ensures efficient chip evacuation, reducing the risk of clogging and thread damage.

Ideal use cases

• Cutting internal parallel pipe threads in steel
• Threading stainless steel and non-ferrous metal pipes
• Creating threads for G 1-3/4 inch fittings
• Repairing or re-threading existing pipe connections

Good to know

Use with a suitable tapping lubricant and a tap wrench that fits the 24 mm square drive. For best results, drill the core hole to 57.5 mm before tapping.