RUKO HGB-DIN352-HSS-55° 1/4 inch BSW Hand Tap, HSS, DIN 352, 55° Thread Angle

Cutting internal BSW threads by hand demands a tap that stays sharp, follows the DIN 352 standard, and matches the 55° Whitworth thread form exactly. The RUKO HGB-DIN352-HSS-55° hand tap is made from high-speed steel for reliable thread cutting in steel, non-ferrous metals, and plastics. Its 1/4 inch BSW thread with 20 TPI and 55° thread angle produces clean, accurate threads in through or blind holes.

Who is it for

Machinists, maintenance technicians, and metalworkers who need to create or repair 1/4" BSW threads manually with a tap wrench. Suitable for workshops, repair shops, and on-site service where a machine tap is not available.

Main features

• High-speed steel (HSS) for durability and heat resistance
• DIN 352 standard dimensions for consistent interchangeability
• BSW thread form: 1/4 inch, 20 TPI, 55° thread angle
• Straight flutes for efficient chip evacuation in manual tapping
• Right-hand cutting direction for standard clockwise threading
• Bright finish, uncoated
• Square drive size 4.9 mm for secure tap wrench engagement

Specifications

• Material: HSS
• Standard: DIN 352
• Thread type: BSW
• Thread size: 1/4 inch
• Thread pitch: 20 TPI
• Thread angle: 55°
• Flute type: Straight
• Cutting direction: Right-hand
• Overall length: 60 mm
• Thread length: 18 mm
• Shank diameter: 6 mm
• Square drive size: 4.9 mm
• Number of flutes: 3
• Application: General purpose threading
• Recommended materials: Steel, non-ferrous metals, plastics
• Surface finish: Bright
• Tool type: Hand tap (single)
• Usage: Manual operation with tap wrench

Tips

Use a suitable tap wrench and apply cutting oil to improve thread finish and tool life. For blind holes, clear chips regularly to prevent clogging. Ensure the tap is aligned perpendicular to the workpiece to avoid thread misalignment.