What is a Grade 5 bolt?

Grade 5 bolts are case hardened, meaning the bolt has been heated enough to hardened the outside of the bolt but not enough to harden the inside portion. Grade 5 bolts are identified by 3 evenly spaced radial lines on the head.

What is a Grade 8 carriage bolt?

37 products. Carriage bolts can be used with wood, metal, or concrete to build strong structures such as wooden decks. They are commonly used in ready-to-assemble furniture.

What is a 5/16 carriage bolt?

5/16″-18 Carriage bolts have a domed or countersunk head, and the shank is topped by a short square section under the head. All Carriage Bolts over 6″ in length are Partially Threaded. This item qualifies for FREE SHIPPING on orders $99+

Are carriage bolts better than lag bolts?

Construction. The carriage bolt is more of a bolt than its lag counterpart. This means that you have to countersink the bolt for it to perform as it is supposed to. The lag bolt, on the other hand, has a point at the end and wide threads for use in wood construction.

What are Grade 5 bolts used for?

Grade 5 is specified under the Society of Automotive Engineers and is meant to be used for those applications requiring medium strength. Equivalent to the metric class 8.8 bolts, it is important to line up the right hardware if required to move from U.S. customary units (USC) to the metric system.