Engineered for precision threading in through-hole applications, the OSG BSF Spiral Point Threading Tap delivers consistent, high-quality threads with clean chip evacuation. Built from cobalt-enhanced HSS-E and finished with a Steam Oxide coating, it stands up to heat and wear in demanding machining tasks.

• Threading type: BSF Spiral Point design for efficient chip evacuation in through-hole work
• Material: HSS-E (high-speed steel with cobalt) for enhanced strength and heat resistance
• Coating: Steam Oxide coating provides wear resistance and smoother entry
• Hole type: Through-hole threading performance
• Size: 3/8 x 20 BSF
• Brand: OSG — trusted threading technology for critical machining tasks

With the OSG BSF Spiral Point Threading Tap, you’ll achieve precise thread profiles that fit tightly and function reliably in assembled parts. The cobalt-enhanced HSS-E core keeps cutting edges sharp under higher heat, extending tool life and reducing downtime. The spiral point design pushes chips forward through the hole, minimizing chatter and debris buildup, which translates to smoother operation and faster cycles in production environments. This tap is an ideal choice for shops tackling through-hole fastener work, prototype builds, and precision assemblies where consistent thread quality matters most.