5/8-11 x 1 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (200)

10 x 1 Simpson Pancake-Head Screw - Square Drive 410 SS - Carton (1000)

5/8-18 x 8 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (25)

Marine screws are locked in place thanks to their "teeth" (the thread indentations will resist back-out even after prolonged vibration)

1/4-28 x 2 1/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (100)

5/8-11 x 3 1/4 A325 Type 1 Heavy Hex Bolt Plain (100) M33-3.50 Socket Cap Screws 12.9 Alloy Plain DIN 912 5/8-11 x 1 1/2 Grade5 8 11 x 3 1 4 A325 Type 1 Heavy Hex Bolt Plain (150) . Heavy Hex A325 structural bolts are designed for steel to steel structural connections. For this reason, they are typically very short. The A325 and A490 specifications are not intended for general applications, including anchor bolts. Free certs available on request.