The OSG Threading Tap BSW A-Spiral Flute is a precision tool designed for cutting British Standard Whitworth threads in blind holes, delivering reliable performance for both professional shops and serious DIY projects.

• Thread type: British Standard Whitworth (BSW) right-handed threads in blind holes (DIN2184-1)
• A-Spiral flute design: Enhances chip evacuation in blind-hole operations to minimize resistance and binding
• Material: Powder metal substrate for improved durability and wear resistance
• Coating: TiCN (Titanium Carbonitride) reduces friction and extends tool life at higher speeds
• Size and pitch: 5/16" diameter with 18 threads per inch (5/16 x 18)
• Application: Optimized for blind holes, where through-holes aren’t possible
• Orientation: Right-hand tapping for standard clockwise threads

With the combination of a specialized flute geometry and TiCN coating, this tap delivers consistent, precise threads in challenging blind-hole scenarios. The TiCN coating minimizes wear and heat buildup, enabling cleaner cuts and longer tool life, even when tapping harder materials. The powder metal body provides robust toughness, helping to prevent premature breakage and maintain thread accuracy across multiple parts. This makes it an excellent choice for automotive, mechanical, and industrial assemblies that require dependable BSW threads in restricted-depth holes.