SwissTech: M6X1 Red Ring Sp/Pt DIN37 1 HSS-EV BRT Tap Spiral Point/Gun Nose - ISO Metric Coarse HSS-Co Bright Finish. For through holes. Taper lead to DIN form B (3.5 x P to 5.5 x P). Tapping tolerance to 6HX. Manufactured to DIN 371/376. M…View more