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The undercut design helps to prevent the screw from loosening over time
Carriage bolts are designed to be used with wood and have a square neck under the head that prevents the bolt from turning when tightened
The nut is zinc plated for corrosion resistance
It has a round head with a Phillips drive and a length of 1 3/8 inches
1/4-20 x 3/4 Unslotted Ind Hex Washer Internal Sems Machine Screw Full Thread Zinc 5/16-18 NTU The undercut design helps toThis 1 4 20 x 3 4 Unslotted Ind Hex Washer Internal Sems Machine Screw Full Thread Zinc is a versatile and durable fastener designed for a wide range of applications. Its 1 4 20 thread size and 3 4 inch length provide a secure hold, while its internal washer helps distribute the load and prevent damage to the mating surface. The unslotted hex head allows for easy installation with a hex key or wrench, and the zinc plating provides corrosion resistance
