M5 304 Stainless Steel Extra-Wide Serrated-Flange Hex Head Bolts
These screws have good chemical resistance and may be mildly magnetic. Serrations under the head grip the material surface for mild vibration resistance, and the flange distributes pressure where the screw meets the surface, eliminating the need for a separate washer. Head height includes the flange. Length is measured from under the flange.