Fastener Length:5', Package Quantity:15-Project Pak, Fastener Color / Finish:Zinc Plated, Bolt Type:Carriage, Fastener Thread Type:Coarse 3/8-16 Coarse-Thread Round-Head Carriage Bolt Bolt Thread Pitch: 16 Bolt Diameter: 3/8 Smooth, rounded head that has a small square section underneath Used in wood connections utilizing the square neck under the round head which will sit into the hole to prevent the head from turning New in package Additional Details ------------------------------ Product description: Fastener Length:5', Package Quantity:15-Project Pak, Fastener Color / Finish:Zinc Plated, Bolt Type:Carriage, Fastener Thread Type:Coarse 3/8-16 Coarse-Thread Round-Head Carriage Bolt Bolt Thread Pitch: 16 Bolt Diameter: 3/8 Smooth, rounded head that has a small square section underneath Used in wood connections utilizing the square neck under the round head which will sit into the hole to prevent the head from turning