The OSG Threading Tap UNF A-Spiral Flute is a precision-tuned tapping tool designed for professionals who create UNF threads in blind holes. Built for durability and consistent performance, it helps you achieve clean, accurate threads in tight spaces with fewer reworks.

• Thread type: UNF (Unified National Fine) threading for high-precision, fine-pitch taps in blind-hole applications.
• A-Spiral flute: Optimized spiral flute design that promotes efficient chip evacuation and reduces clogging in deep or blind holes.
• Material: Powder metal body engineered for superior wear resistance and temperature tolerance during high-speed tapping.
• Coating: TiCN (Titanium Carbonitride) coating to increase hardness, lower friction, and extend tool life in demanding cuts.
• Size and length: M4 x 40 profile, providing the right balance of rigidity and reach for small-diameter workpieces.
• Direction: Right-hand threading for standard UNF applications.
• Standards: DIN 2184-1 compatibility, ensuring reliable performance in standardized blind-hole tapping.

This tap excels in automotive, aerospace, and precision manufacturing where reliable UNF threads in blind holes are critical. The combination of a TiCN-coated powder-metal body and an A-Spiral flute reduces tool wear and minimizes chip-related issues, delivering consistent results across multiple parts. Whether you’re building tight-tolerance assemblies or performing high-speed production tapping, this tool helps you achieve accurate threads with fewer insertions and less downtime.