RUKO MGB-DIN5156-HSSCo-55°-Rp-7/8 Machine Tap

For pipe fitters and maintenance crews threading parallel British Standard Pipe threads in steel, stainless steel, cast iron, and non-ferrous metals, the RUKO MGB-DIN5156-HSSCo-55°-Rp-7/8 machine tap delivers reliable performance in both through and blind holes. The cobalt-alloyed high-speed steel construction provides enhanced heat resistance and wear life, while the straight flute design ensures efficient chip evacuation.

Key specifications

• Thread type: Rp (British Standard Pipe Parallel)
• Thread size: 7/8 inch
• Thread angle: 55°
• Material: HSSCo (High-Speed Steel with Cobalt)
• Standard: DIN 5156
• Cutting direction: Right-hand
• Flute type: Straight
• Shank: Cylindrical with square drive
• Overall length: 130 mm
• Thread length: 45 mm
• Shank diameter: 18 mm
• Square drive: 14.5 mm
• Major thread diameter: 30 mm
• Recommended core hole diameter: 28.5 mm
• Tolerance class: ISO 7-1
• Surface finish: Bright (uncoated)

Why choose it

The HSSCo material withstands higher cutting temperatures than standard HSS, extending tool life when tapping tough alloys. The precise 55° thread angle and ISO 7-1 tolerance ensure a proper seal for parallel pipe connections.

Ideal use cases

• Creating internal Rp threads in pipe fittings and flanges
• Maintenance and repair of hydraulic and pneumatic systems
• Production threading in metalworking shops

Good to know

The tap is designed for machine use with a suitable tapping chuck or holder. Use appropriate cutting fluid for best results and tool longevity.