RUKO MGB DIN 5156 HSS-Co 55° Pipe Thread Tap Rp 1 1/4

This RUKO pipe thread tap stands out for its cobalt-alloyed high-speed steel construction, which delivers the heat resistance and edge retention needed for demanding internal threading jobs in steel and stainless steel. The straight-flute design and square drive make it equally suited to hand tapping or machine use.

Highlights

• HSS-Co (cobalt high-speed steel) for high hot hardness and wear resistance
• British Standard Pipe Parallel (BSPP / Rp) thread form, 1 1/4 inch nominal size
• 55° thread angle and 11 threads per inch, conforming to DIN 5156
• Straight flutes for efficient chip evacuation in through or blind holes
• Square drive shank for secure holding in tap wrenches or machine chucks

In daily use

The tap is intended for cutting internal parallel pipe threads in a range of materials, including steel, stainless steel, cast iron and non-ferrous metals. Its bright, uncoated finish reduces friction and helps prevent chip welding, while the right-hand cutting direction suits standard clockwise tapping operations.

Full specifications

• Product type: Pipe thread tap
• Material: High-speed steel cobalt (HSS-Co)
• Thread standard: BSPP (Rp), DIN 5156
• Nominal thread size: 1 1/4 inch
• Thread pitch: 11 TPI
• Thread angle: 55°
• Flute type: Straight flute
• Cutting direction: Right-hand
• Shank type: Square drive
• Surface finish: Bright (uncoated)
• Overall length: 170 mm
• Thread length: 55 mm
• Shank diameter: 30 mm
• Square drive size: 24 mm
• Number of pieces: 1

Final note

A reliable general-purpose tap for pipe threading, built to DIN 5156 and made from cobalt HSS for longer tool life in tougher materials.