Socket head cap screw is a threaded fastener with a cylindrical head and a hexagonal recess for tightening with a hex wrench or Allen key. Socket head cap screws are also called Allen head screws, cap screws, or caps. Socket head cap screws can be used in tight spaces where wrenches or sockets can't fit. They can be tightened to higher torque specifications than other types of fasteners.
They are strong and durable, making them ideal for use in vehicles, aircraft, and power generation equipment.
They can resist extreme temperatures and corrosion, making them a good choice for aerospace applications.
Load-bearing capacity
Socket head cap screws can be fully or partially threaded, depending on the application. The length of a socket screw is usually measured from just below the head to the tip.