Dormer EX31 1" HSS XS1 UN Spiral Flute Spectrum Tap

HSS-E-PM Premium Powder Metal substrate provides superior abrasion resistance and edge strength 45 degree helix and specific rake designed for excellent performance when threading blind holes Special flute geometry prevents nest formation of swarf, reducing the risk of re-cutting swarf on reversal Steam Temper (ST) reduces wear and prevent built-up-edge in abrasive or harder ferrous materials Primary for use on CNC machines