The OSG UNC A-Spiral Flute Threading Tap is built for high-performance tapping of UNC threads in blind holes. Designed for machinists and engineers who demand precision and durability, this TiCN-coated, powder-metal tap delivers clean threads and long tool life in demanding applications.

• Thread Type: UNC (Unified National Course) with A-Spiral flute design for efficient chip evacuation in blind holes
• Material: Powder metal construction provides enhanced strength, wear resistance, and durability under high-speed tapping
• Coating: TiCN (titanium carbonitride) coating reduces friction and increases hardness for longer tool life and smoother cuts
• Flute Design: A-spiral flute promotes consistent chip flow and minimizes binding in confined blind-hole environments
• Configuration: Right-hand thread compatible with standard UNC applications and the DIN2184-1 specification
• Size: M5 x 40 tapping size and length, suitable for small- to mid-size blind-hole projects

The combination of powder-metal substrate and TiCN coating delivers improved wear resistance, reduced risk of breakage, and extended tool life even in tougher materials and high-speed machining. The spiral flute design ensures steady chip removal, helping maintain thread quality and reducing the chance of clogging inside blind holes. Ideal for production runs and precision assemblies, this tap supports reliable, repeatable results in automotive components, machinery housings, and electronics enclosures—where clean, accurate UNC threads matter most.