RUKO HGB-DIN352-HSS-55° 1/4" BSW set maschi per filettatura a mano

Hand tap set for cutting British Standard Whitworth (BSW) threads with a 55° thread angle. Manufactured from high-speed steel (HSS) for durability and precision in general-purpose threading applications.

Advantages

Straight flute design allows efficient chip evacuation. Bright finish reduces friction during cutting. Suitable for unalloyed and low-alloyed steels, cast iron, and non-ferrous metals.

Suitable for

• Creating internal threads in through-holes and blind holes
• Maintenance and repair work requiring BSW threads
• Use with tap wrenches and tapping machines

Key specifications

• Thread standard: BSW (British Standard Whitworth)
• Nominal thread size: 1/4 inch
• Threads per inch: 20
• Thread angle: 55°
• Tap form: Bottoming tap (Fertigschneider)
• Material: High-speed steel (HSS)
• Standard: DIN 352
• Overall length: 63 mm
• Thread length: 18 mm
• Shank diameter: 5 mm
• Square drive size: 4 mm
• Recommended core hole diameter: 5.2 mm
• Number of flutes: 4
• Cutting direction: Right-hand

Recommendations

For best results, use a suitable cutting fluid and ensure proper alignment when starting the thread.