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1/4"-20 x 5-1/2" Zinc Plated Grade 2 / A307 Steel Coarse Thread Carriage Bolts

1/4"-20 x 5-1/2" Zinc Plated Grade 2 / A307 Steel Coarse Thread Carriage Bolts

Diameter: 1/4" Length: 5-1/2" Material: Steel Finish: Zinc Head Style: Carriage Thread Size: 20 (Coarse) Thread Length: Full Hardness: Grade 2 / A307 Type: Carriage Bolt Square-Depth: 5/32" 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.