OSG Threading Tap - BA Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 4BA

The OSG BA Spiral Flute Threading Tap in 4BA is a precision internal threading tool designed for blind-hole work. Built for engineers and machinists who demand accurate threads and reliable performance, it combines tough materials with a finely tuned design to handle small-diameter applications with confidence.

• Thread size: 4BA internal thread specific to BA-series components, optimized for blind-hole tapping.
• Material: HSS‑E (high-speed steel with cobalt) for superior hardness and heat resistance during demanding cuts.
• Coating: Steam oxide coating to reduce friction, improve wear resistance, and extend tool life.
• Flute design: Spiral flute geometry facilitates efficient chip evacuation in blind holes, minimizing clogging and breakage.
• Application: Ideal for precise internal threads in metal housings, instrumentation, and compact mechanical assemblies.
• Manufacturer: OSG, a trusted name in high-performance threading tools.

With this 4BA spiral-flute tap, you’ll achieve clean, accurate threads in confined spaces while benefiting from the durability of cobalt-infused steel and the low-friction coating. The spiraled flutes help carry chips out of blind holes, reducing dwell time and the need for rework. This tap is well-suited for production runs or single-task projects in electronics enclosures, precision machinery, automotive components, and other small-scale metal work. For best results, use appropriate cutting fluid and maintain proper alignment and lubrication to maximize tool life and thread quality.