OSG Threading Tap - BSW Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 5/16 x 18 SPIRALMILLINSERT and the secure taper shank

and the secure taper shank makes setup fast and stable in standard tool holders

Metric fine thread specificity: M25 x 0

Featuring a compact 3 mm cutting diameter and 14 mm overall length in a 2-flute square-end configuration

Rigid long‑shank carbide construction: a 6 mm shank provides extended reach while maintaining rigidity

delivering consistent thread quality across multiple projects

OSG Threading Tap - BSW Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 5/16 x 18 SPIRALMILLINSERT and the secure taper shankElevate your through hole threading with the OSG BSW Spiral Point Threading Tap. Crafted from highspeed steel with cobalt (HSSE) and finished in a durable Steam Oxide coating, this tap is built for precision, longevity, and reliable performance in demanding metalworking environments. Material: HSSE (highspeed steel with cobalt) for superior heat resistance and extended tool life in tough materials. Coating: Steam Oxide finish to reduce wear, improve