SwissTech: M4X0.7 Red Ring Sp/Pt DIN 371 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.…View more