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Non-serrated hexagon flange bolts to DIN 6921 in A2 (304) stainless steel. The integral flange under the head spreads clamping load across a wider bearing area, which removes the need for a separate flat washer in most joints.
Used across automotive, plant machinery, chassis work, structural steel bracketry and any bolted joint where a large bearing area matters or where a separate washer would fall out during assembly. Combine with a nyloc nut (DIN 985) for vibration-prone joints. DIY and Trade packs available, free next-day UK delivery.