Flange hex bolt full thread is hex bolt with integrated flange under the head and full thread along the shank. The flange increases contact area and distributes pressure, no extra washer needed. Full thread design enables flexible connection length adjustment. Common strength classes: 8.8,10.9. Widely used for automotive, machinery, metal frame assembly. Material: carbon steel; finishes: blue-white zinc plated, color zinc plated, black oxide.