RUKO HGB-DIN5157-HSS-55°-Rp-1/4 käsikierretappi, 1/4 inch BSPP, HSS, DIN 5157

Precision-ground HSS hand tap for cutting internal parallel pipe threads (Rp 1/4") to DIN 5157 / ISO 7-1, with a 55° flank angle and 19 TPI for reliable thread quality in steel, cast iron and non-ferrous metals.

Overview

The RUKO HGB-DIN5157-HSS-55°-Rp-1/4 is a single hand tap engineered for manual threading of G 1/4" (BSPP) internal threads. Made from high-speed steel (HSS) with a bright finish, it delivers clean, accurate threads in a wide range of materials. The tap features a 4-flute design for efficient chip evacuation and a right-hand cutting direction.

What stands out

• Conforms to DIN 5157 / ISO 7-1 for Rp 1/4" parallel pipe threads
• 55° flank angle and 19 threads per inch ensure standard-compliant threads
• High-speed steel construction for durability and wear resistance
• Bright, uncoated surface reduces friction and prevents chip welding
• Compact dimensions: 65 mm overall length, 22 mm thread length, 11 mm shank diameter

Technical details

• Thread standard: DIN 5157 / ISO 7-1
• Thread type: Rp (internal parallel pipe thread)
• Nominal thread size: 1/4 inch
• Threads per inch: 19
• Flank angle: 55°
• Material: High-speed steel (HSS)
• Cutting direction: Right-hand
• Number of flutes: 4
• Overall length: 65 mm
• Thread length: 22 mm
• Shank diameter: 11.0 mm
• Square drive size: 9.0 mm
• Surface finish: Bright / uncoated

Our verdict

A dependable, standard-compliant hand tap for professionals and serious DIYers needing precise BSPP threads in common engineering materials.