RUKO HGB-DIN352-HSS-55° 1/4 inch BSW 3-Piece Hand Tap Set, HSS, DIN 352

Precision-ground 55° Whitworth hand tap set for cutting BSW threads in steel up to 800 N/mm².

Overview

This RUKO set includes three taps: taper, second, and bottoming, allowing you to cut full threads in both through and blind holes. The 55° thread angle conforms to the British Standard Whitworth profile, and the set is manufactured to DIN 352 from high-speed steel for durability.

What stands out

• Complete set: taper, second, and bottoming taps for sequential thread cutting.
• 55° thread angle matches BSW standard, ideal for older machinery and classic vehicles.
• HSS construction withstands high cutting temperatures.
• Square drive shank for secure holding in tap wrenches.
• Bright finish reduces chip adhesion.

Technical details

• Thread type: BSW (British Standard Whitworth)
• Nominal thread size: 1/4"
• Thread pitch: 20 TPI
• Thread angle: 55°
• Standard: DIN 352
• Material: HSS
• Number of pieces: 3
• Cutting direction: Right-hand
• Shank type: Square drive
• Surface finish: Bright
• Recommended core hole diameter: 5.0 - 5.1 mm
• Overall length: 65 mm per tap
• Shank diameter: 6.0 mm per tap
• Square drive size: 4.9 mm per tap
• Flute type: Straight flutes
• Tolerance: Medium
• Suitable materials: Unalloyed and alloyed steels up to 800 N/mm², malleable cast iron, non-ferrous metals

Our verdict

A reliable set for cutting precise BSW threads, backed by RUKO's reputation for quality cutting tools.