Expertly engineered for high-precision manual threading operations in specialized repair, maintenance, and machining environments, the Somta Metric Left Hand Straight Flute Intermediate Hand Tap range is the definitive industrial choice for cutting reverse-thread ISO profiles. Operating on the standard 60° ISO Metric thread profile with a counter-clockwise tightening orientation, these premium high-speed steel (HSS-E) hand tools feature a robust straight flute geometry and a standard square drive shank optimized for secure engagement with manual tap wrenches. The precision-ground intermediate lead profile features a balanced 3-to-5 thread chamfer that distributes manual cutting torque evenly to ensure reliable self-alignment, clean entry shearing, and perfect reverse-pitch compliance. Engineered by Somta to handle high torsional forces with zero tool deflection, this heavy-duty left-hand hand tap series is structurally optimized to deliver exceptional tool life and reliable accuracy across a wide range of structural materials, including structural steels, mild steel, AS/NZS 3678 250 and 350 grade plate, free-cutting steels, and unalloyed case-hardened steels.

HSS APPLICATIONS

• Suitable for general purpose use in hand or machine operations
• Taps are produced with precision ground threads
• Good for cutting new threads
• Suited for use in a variety of ferrous and non-ferrous materials

HSS TECHNICAL DATA

• Made from High Speed Steel
• Standard  - ISO529
• Left hand cutting