5/16"-18 x 1-1/2" Chrome Grade 5 Carriage Head Bumper Bolts CBS5-154 (5 pcs.)

Diameter: 5/16"
Length: 1-1/2"
Material: Steel
Finish: Chrome
Head Style: Carriage
Thread Size: 18 (Coarse)
Thread Length: Full
Hardness: Grade 5
Style: Bumper Bolt
Type: Carriage Bolt

Box of 5.

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.