The squared section is of the same size as the diameter of the bolt shank, with a plain unthreaded shank. The smooth domed head and square nut below prevent the carriage bolt from being unlocked from the insecure side. Round domed head with square neckPackage includes ten each of bolts, hex nuts & washersZinc plated for corrosion resistanceSuitable for indoor or outdoor useBCP Fasteners are always backed by a 100% satisfaction guaranteeA carriage bolt, coach bolt or round head square neck bolt is a form of bolt used to fasten metal to wood or wood to wood. Carriage bolts were developed for use through iron strengthening plates on either side of a wooden beam. Carriage Bolt 10 Ten (10) 1/2-13 X 4" Long Carriage Bolts Set W/ Nuts & Washers - BCP Carriage Bolts Metric Zinc plated for corrosion resistance Ten (10) 5/16-18 x 1-1/2 Long Carriage Bolts Set w/ Nuts & Washers... Carriage bolts are distinguished from other bolts by its shallow mushroom head and the portion immediately beneath the head is formed into a square section. It is commonplace though to use them to bare timber, the squared section giving enough grip to prevent rotation. BCP Fasteners are always backed by a 100% satisfaction guarantee 10 inch carriage bolts wholesale, 10 inch carriage bolts price The head of a carriage bolt is usually a shallow dome. Columbia Pine Mountain™ Bucket Hat This allows the fastener to be installed with only a single tool, a spanner or wrench, working from one side. This makes the bolt self-locking when placed through a square hole in a metal strap, or a round hole in most wood.
