Socket Head Cap Screws are preferred when bolts and nuts can not be used. The hex socket screw drive gives the screw six stress-bearing sides for use with an Allen wrench. This enables the screw to resist cam-out better than most other drives.
It enable you to achieve higher torque and clamping force. Fewer pieces of hardware reduce the weight of your finished application. It also reduces your costs and the time needed to drill holes and tap into surfaces.
Flat Socket Head Cap Screws are countersunk and expose none of their head above the mating surface. These are often used for assembling close tolerance machinery where head height is critical.
Button Socket Cap Screws have a mushroom-shaped head. Within the head is the same hexagonal recess as other socket cap screws. Button socket cap screws simply have a protruding head that’s shaped like a button.
Socket Set Screws are a type of threaded fastener, most often used for securing components in place. This generally means affixing two or more loose parts to one another, for example by holding one component tightly against (or inside) a second surface.
Shoulder Bolts are a type of screw with three distinct sections: the head, the unthreaded shoulder, and the threads. These types of screws consist of integral threads that are present on half or less of the screw shank and the rest of the shaft is enlarged and smooth to allow the bolted material the ability to rotate or move around the screw axis.