SwissTech: M6X1 Red Ring Sp/Fl DIN37 1 HSS-EV OX Tap Spiral Flute - ISO Metric Coarse HSS-EV Oxidised Finish. For blind holes. Taper lead to DIN form C (3 x P). Tapping tolerance: spiral flute to 6H. Manufactured to DIN 371/376 ISO Metric C…View more