The Hillman Group Hex Bolts: The Hillman Group Screws 1/4 in. x 3 in. External Hex Hex-Head Cap Screw (10-Pack) 2423
Hex cap screws can be used when looking for outdoor applications or a stronger bolt. The name hex cap screw and hex bolt are commonly interchanged. A common feature on a hex cap screw is a washer surface directly under the head which creates a better seal.