RUKO HGB DIN 5157 HSS 55° Rp 1-1/8 Machine and Hand Tap

Cutting internal parallel pipe threads with precision can be a challenge, especially when working with tough materials like steel and cast iron. This RUKO machine and hand tap solves that problem by delivering clean, accurate threads in a single pass, thanks to its high-speed steel construction and DIN 5157 standard geometry.

Who is it for

This tap is built for machinists, plumbers, and metalworkers who need to produce reliable Rp 1-1/8 inch parallel pipe threads. It works equally well in a machine or by hand, making it a versatile addition to any workshop.

Main features

• DIN 5157 standard for internal parallel pipe threads
• Rp thread type (British Standard Pipe Parallel) with 55° flank angle
• High-speed steel (HSS) for durability and long tool life
• Right-hand cutting direction
• 4 flutes for efficient chip removal
• Bright uncoated finish

Specifications

• Nominal thread size: 1-1/8 inch
• Threads per inch (TPI): 11
• Pitch: 2.309 mm
• Overall length (L1): 170 mm
• Thread length (L2): 55 mm
• Shank diameter (d1): 31.5 mm
• Square drive size (a): 25 mm
• Approx. major diameter: 44.845 mm
• Approx. minor diameter: 42.536 mm
• Recommended materials: Steel, cast iron, non-ferrous metals

Tips

Use a suitable cutting fluid to extend tool life and improve thread finish. For best results, ensure the hole is drilled to the correct tapping size for Rp 1-1/8 threads before starting.