The OSG Threading Tap BSW A-Spiral Flute is designed for cutting British Standard Whitworth threads in blind holes. This TiCN-coated, powder-metal tap delivers reliable, long-lasting performance for machinists working in closed-end holes.

• Thread type: British Standard Whitworth (BSW) threading for 1/4-20 blind-hole applications.
• A-Spiral Flute: Optimizes chip evacuation in blind holes to reduce binding and tool stress.
• Material: Powder-metal construction provides enhanced wear resistance and durability.
• Coating: TiCN coating lowers friction and increases hardness for higher cutting speeds and improved heat tolerance.
• Direction: Right-hand threading aligned with standard assembly practices.
• Hole type: Specifically engineered for blind holes where access to the far side is limited.
• DIN standard: Complies with DIN2184-1 for consistent tapping performance.
• Size: 1/4 x 20 BSW thread profile to match common hardware in British-standard systems.

With its spiral flute, tough powder-metal core, and TiCN coating, this OSG tap delivers cleaner, more precise threads while extending tool life in production or repair work. The design minimizes chip buildup in closed-end holes, helping you maintain consistent thread quality and reducing the need for re-tapping. For best results, use proper lubrication, select the correct drill size for a precise hole, and employ light pecking to clear chips on deeper taps.