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Ribbed Flange Bolts W158 FL


Ribbed Flange Bolts are a hexagon head bolt with a washer like flange built onto the head that has ribs on the bottom of the flange.

The ribs on the flange penetrate into the mating surface when tightened to help lock the fastener in place. When the ribbed flange bolt is removed it typically leaves less damage behind on the mating surface than the serrated flange bolt.

Ribbed Hex Flange Lock Bolt W158FL