M42X4.5 H HSF -LNG HSS-e P6520 B-Semi Bottom -3 itch T305158 t305153r00_CAL GT30-XL HSF P HSS-e Taps .2598mm H2 00 High-Performance Taps Victory Spiral-Flute HSSE-PM Taps Blind Hole mPVD o Coolant o Coolant R Right Hand Helix/Flute