The Fastenal Hex Serrated Flange Bolt is the perfect choice for any project requiring a strong and reliable fastener. Constructed from steel material, this bolt is plated with zinc to help retard corrosion and extend the lifespan of the washer. The coarse thread design ensures a strong grip and efficient installation, while the imperial system ensures precise measurements for compatibility and ease of use. FleetPride is your First Click in Heavy Duty®.