Engineered for BSPT threading in blind holes, the OSG BSP Spiral Flute Threading Tap (1/8 x 28) delivers precise, reliable BSPT threads when access is limited to deep or recessed holes. Crafted from cobalt-enhanced HSS-E and protected by a Steam Oxide coating, this tap is built for durability and steady performance in challenging machining tasks.

• Size and threading: 1/8" nominal size with 28 threads per inch (BSPT), designed for blind-hole tapping.
• Material: HSS-E (high-speed steel with cobalt) for increased hardness and wear resistance at elevated cutting temperatures.
• Coating: Steam oxide coating provides corrosion resistance and reduced friction, promoting smoother cuts and longer tool life.
• Flute design: Spiral flutes optimize chip evacuation, minimizing chip packing in blind holes and reducing torque.
• Application: Specifically tailored for BSPT thread formation in blind holes in metal workpieces like valves, fittings, and hydraulic components.
• Brand technology: OSG’s advanced threading technology supports accurate thread profiles and consistent performance across multiple taps.

With this tap, you can achieve clean, accurate BSPT threads in tight, blind-hole environments. The cobalt-rich HSS-E stands up to heat and wear, delivering extended tool life under demanding machining conditions. The steam oxide coating reduces galling and friction, helping maintain steady cutting action and an improved surface finish across runs. The spiral flute layout ensures reliable chip evacuation, lowers the risk of clogging, and supports consistent thread depth even in deep holes.