Metric Flange Bolts, Non-Serrated, Class 10.9 Zinc

METRIC CLASS 10.9 HEX FLANGE SCREW, NON SERRATED, DIN 6921, ZINC CR+3

Metric flange bolts have a ridge or skirt (flange) around the bolt head that distributes the clamping load when the bolt is tightened. The flange works like a washer. Flange bolts are sometimes called frame bolts.