ARP  5/16"-18 x .50" Polished Stainless Steel & black ecoat 12pt Simulated Beadlock Bolt Hardware Kit. These are the best bolts money can buy both visually and for strength. Kit includes 24 x 5/16-18 x .50" bolts and washers. 

Fastener Grade: ARP Stainless 300
Fastener Yield Strength (psi): 180,000 psi
Wrench Diameter: 3/8 in.