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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.
5/16 inch-18 x 3 inch Zinc Plated Grade 5 Steel Coarse Thread Carriage Bolts 100 Pcs A10265
Sale price
$11.90
Regular price $41.75
Shipping calculated at checkout.