The OSG BA Spiral Flute Threading Tap is a precision tool designed for tapping British Association (BA) threads in blind holes. Built for machinists and technicians who need reliable, clean threads in tight spaces, it delivers dependable performance from first cut to final thread.

• Thread size: 4BA British Association threading for compact, precise fits
• Flute design: Spiral flute geometry for smooth chip evacuation in blind holes
• Material: Powder metal substrate delivering high hardness, wear resistance, and heat tolerance
• Coating: TiCN coating to reduce friction, extend tool life, and support higher cutting speeds
• Cutting direction: Right-hand geometry optimized for standard BA threading applications

The combination of spiral flutes, durable powder-metal construction, and a TiCN coating translates to longer tool life, more consistent thread quality, and improved efficiency in blind-hole tapping. Expect reduced chip buildup, steadier machining at higher speeds, and precise, repeatable 4BA threads in a range of thin-walled or recessed components. This tap is ideal for aerospace, electronics housings, instrumentation, and any application where compact BA threads must be tapped accurately without accessing both ends.