Irwin Hanson 333323 Spiral Point Tap Set 1/2-20 UNF HSS 3-Piece

The Irwin Hanson 333323 is a professional-grade 3-piece spiral point tap set designed for creating 1/2"-20 UNF (United National Fine) threads in through holes. Constructed from high-speed steel (HSS) with ground threads, these right-hand cut taps deliver superior thread quality and extended tool life for demanding metalworking applications.

Key Features:

• 1/2"-20 UNF thread size with 20 threads per inch
• 3-flute spiral point design pushes chips forward, preventing chip loading
• High-speed steel construction for durability and heat resistance
• Ground thread for precise, accurate threading
• H3 pitch diameter limits ensure proper thread tolerance
• Right-hand cut direction for standard threading applications

Spiral point taps, also known as gun taps, are specifically engineered for tapping through holes where the cutting action pushes chips ahead of the tap rather than up through the flutes. This design reduces torque requirements and helps prevent tap breakage. The 3-piece set typically includes taper, plug, and bottoming taps for complete threading versatility in both hand and machine tapping operations.