OSG Threading Tap - Metric Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - M39 x 4 Magnetic Accessories giving you consistent hole finishes

giving you consistent hole finishes and reduced rework

Engineered for both professional workshops and serious hobby projects

DIN 8093 compatibility and ISO H4 tolerance help ensure interchangeability with standard setups and predictable results

With the TiAlN coating and optimized 3-flute geometry

this spiral mill threading insert offers a trusted

OSG Threading Tap - Metric Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - M39 x 4 Magnetic Accessories giving you consistent hole finishesThe OSG Metric Spiral Flute Threading Tap is a high performance tool designed for precise threading in blind holes, ideal for professional machinists and shops handling large diameter metric threads. Crafted from HSS E with cobalt and finished in steam oxide, it delivers durable cutting performance and excellent heat resistance in demanding tasks. Size Thread: M39 x 4 large diameter metric thread for blind hole applications. Flute Design: Spiral flute