Hex head cap screws are similar to hex bolts, however they feature a washer surface under the head and have a chamfered end (as opposed to the flat end seen on hex bolts). They are often referred to as finished hex bolts by most people. The 6 sided head makes them easy to install using a standard wrench, socket set or nut driver. The first dimension will be the hex head size and the second dimension will be the length of the bolt. Each package contains 2 hex head cap screws (hex bolts).