M3 d. 3.2x6x0.4 BLACK ZINC Serrated lock washer DIN 6798A
Firma Killich s.r.o. offers hexagon bolts and collar (plain, toothed) according to DIN 6921. In the range of DIN 6921 screws, the screws are steel and galvanized in strength 8.8, 10.9. Hexagon bolts (DIN 6921) are on hexagonal wrench.
