The OSG Threading Tap BSW A-Spiral Flute is a precision tapping tool engineered for British Standard Whitworth threads in blind holes. Designed for machinists who demand clean, accurate threads in closed-end applications, it combines tough powder metal construction with a high-hardness TiCN coating to deliver dependable performance and longer tool life.

• Thread type: British Standard Whitworth (BSW), 1/8" diameter with 40 threads per inch (DIN2184-1 compliant)
• Flute design: A-Spiral flute for efficient chip evacuation in blind holes, reducing clogging and chatter
• Material: Powder metal substrate offering durability, wear resistance, and consistent performance
• Coating: TiCN (Titanium Carbonitride) coating to lower friction, increase hardness, and improve heat resistance
• Direction: Right-hand thread for standard threading operations and reliable engagement
• Size: 1/8" nominal diameter, 40 TPI (coordinated with DIN2184-1 specifications)
• Application: Optimized for tapping blind holes where through-holes aren’t available, promoting smooth chip removal and clean threads
• Precision advantages: Tight tolerances and hardened cutting edges support higher cutting speeds and longer tool life

With TiCN coating and a dedicated spiral flute geometry, this tap minimizes heat build-up and wear while delivering consistent thread quality across multiple holes. It’s an ideal choice for small-diameter BSW threads in steel, cast iron, and alloy workpieces where blind-hole tapping is required, helping you reduce rework, downtime, and tool changes while achieving reliable engagement and finishing.