3/8″-16 x 1″ Chrome Grade 5 Carriage Head Bumper Bolts (5 pcs.)
Diameter: 3/8″ Length: 1″ Material: Steel Finish: Chrome Head Style: Carriage Thread Size: 16 (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.