5/16"-18 x 3/4" 18-8 Stainless Carriage Head Bumper Bolts (25 pcs.)

Diameter: 5/16"
Length: 3/4"
Material: Stainless Steel
Head Style: Carriage
Thread Size: 18 (Coarse)
Thread Length: Full
Hardness: 18-8
Style: Bumper Bolt
Type: Carriage Bolt

Box of 25.

A carriage bolt has a domed or countersunk head, and the shank is topped by a short square section under the head. The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened.