The carriage bolt features a smooth rounded head The carriage bolt features a smooth rounded head for appearance safety and security. The square shank under the head pulls into the material as nuts are tightened; The prevents the bolt from turning. Shop carriage bolts in the bolts section here. Find quality carriage bolts online or in store. Choose from our selection of carriage bolts , including over 500 products in a wide range of styles and sizes. In stock and ready to ship.

Stock up on the right carriage bolt from Grainger to build strong wooden decks and other structures the right way every time. You might also want to grab a bolt assortment for backup, as well as the ideal style of U bolt to run piping for outdoor lighting and sound systems. - Length of a carriage bolt is measured from the underhead bearing surface to the extreme end of the bolt . - ASME B18.5-1990 does not specify dimensions for the #8 or #12 diameters. Mar 08, 2019 Like other bolts , the carriage bolt is designed to be used with a nut that helps secure it in place. The nut can be tightened by hand for a reasonably snug fit, or tightened with the assistance of a hand tool that will lock the carriage bolt in place, ensuring it cannot move.