Step bolts are similar to carriage bolts in that they both have a square shoulder and a larger bearing surface. Step bolts, however, have a larger and lower-profile with a round head, creating a smooth surface. The step bolt’s larger head makes it a durable option as it is more difficult pull through soft materials. Browse our selection of step bolts and order online. If you don’t see the item you need, send our knowledgeable staff an email or contact us at 866-463-2910.. With thousands of varying types of bolts in stock, we have the one you need! Shop Online Below!