Description

3/8"-16 x 3-1/4" Zinc Grade 2 / A307 Carriage Bolts CBS-490 (50 pcs.) Diameter: 3/8" Length: 3-1/4" Material: Steel Finish: Zinc Head Style: Carriage Thread Size: 16 (Coarse) Thread Length: Full Hardness: Grade 2 / A307 Type: Carriage Bolt Square-Depth: 7/32" Box of 50. 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.