M5-0.8 X 8mm DIN 6921, Metric, Flange Screws, Hex Indented Head, Serrated, Full Thread, A2 Stainless Steel

Flange under the head acts like a washer to increase the bearing surface and distribute the load.Serrated teeth under the head bite into the mating surface as tightened to prevent loosening.A2 stainless steel is functionally equivalent to 304 grade, also...