The OSG UNF Spiral Flute Threading Tap No. 12 x 28 is built for precision blind-hole tapping in demanding materials. Crafted from HSS-E cobalt with a durable Steam Oxide coating, it delivers reliable performance and extended tool life in tough machining tasks.

• Threading type: UNF spiral flute design optimized for efficient chip evacuation in blind holes, reducing clogging and breakage.
• Size & pitch: No. 12 x 28 UNF, suitable for fine, high-precision threads in tight pockets.
• Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and wear resistance at elevated cutting temperatures.
• Coating: Steam oxide coating provides improved wear, corrosion resistance, and longer tool life.
• Flute geometry: Spiral flutes promote steady chip flow and smoother cutting action in restricted depths.
• Application: Specifically designed for blind-hole tapping, helping you achieve clean, accurate threads where access is limited.

With this tap, you gain consistent thread quality, reduced downtime from chip buildup, and the durability needed for critical machining tasks. Its combination of cobalt-enhanced steel and a robust oxide finish supports reliable performance across a range of materials, making it a dependable choice for precision fastener threads in engines, hydraulics, and compact assemblies. Use it when you require precise threads, tight tolerances, and long tool life in tight or recessed areas.