A394 Grade 2/5/8 Carbon Steel Hot Dip Galvanized Hex Power Bolt

Bolts and screws are both threaded fasteners, but they differ in their design and applications. Bolts typically have an external male thread and are often confused with screws due to their similarities. A hex cap screw, on the other hand, features a hexagonal head, specifically designed for use with a wrench or spanner. When comparing an ASME B18.2.1 compliant cap screw to a hex bolt, the cap screw generally maintains tighter tolerances for the head height and shank length. This tolerance discrepancy allows the ASME B18.2.1 hex cap screw to always fit into spaces where a hex bolt is installed. However, a hex bolt might occasionally be too large to fit into spaces designed for a hex cap screw due to these tighter tolerances.