Description
1/4"-20 x 7" Zinc Grade 2 / A307 Carriage Bolts CBS-343 (125 pcs) Diameter: 1/4" Length: 7" Material: Steel Finish: Zinc Head Style: Carriage Thread Size: 20 (Coarse) Thread Length: Partial Hardness: Grade 2 / A307 Type: Carriage Bolt Square-Depth: 5/32" Box of 125. 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.