OSG Threading Tap - BA Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 4BA

The OSG BA Spiral Point Threading Tap is a precision tool designed for through-hole tapping of 4BA threads. Built for machinists and technicians who demand clean, accurate BA threads with dependable long-term performance.

• Thread size: 4BA – specifically configured for British Association small-thread applications in through-holes.
• Material: HSS-E (high-speed steel with cobalt) for superior wear resistance and heat tolerance during cutting.
• Coating: Steam oxide coating to reduce friction, improve lubricity, and enhance corrosion resistance in challenging environments.
• Geometry: Spiral point design that efficiently evacuates chips and applies forward thrust, aiding faster, cleaner through-hole tapping.
• Application: Optimized for through-hole work, delivering consistent depth and reliable thread quality in thin-walled or delicate parts.

With its cobalt-enhanced core and durable coating, this tap stays sharp longer and withstands higher cutting temperatures. The spiral point geometry minimizes built-up material at the crest, reduces the risk of cross-threading, and supports smoother entry and exit in through-holes. Ideal for precision assemblies in electronics, instrument housings, miniature machinery, and delicate components where small BA threads are common, the OSG BA Spiral Point Threading Tap helps you achieve accurate threads, tighter fits, and extended tool life compared to standard high-speed steel taps.