OSG Threading Tap - Metric Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - M30 x 3.5 Medium this GO gauge offers durability

this GO gauge offers durability and long service life in busy workshop environments

precision radii in cavities and channels

3-flute design uses a double-core construction and a variable helix to optimize chip handling and stability

it’s built for reliability in reaming operations across metals

and the same insert can be used for right-hand or left-hand threads

OSG Threading Tap - Metric Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - M30 x 3.5 Medium this GO gauge offers durabilityOSG's Metric Spiral Flute Threading Tap, built from HSS E and finished with a Steam Oxide coating, is designed for precise blind hole threading in demanding metalworking environments. Suitable for professional shops and those who require reliable, long lasting taps, this tool delivers consistent results at the M30 x 3. 5 size. Material: HSS E (high speed steel with cobalt) for improved heat resistance and durability during tough threading tasks.