Socket Head Bolts are great for limited space installation areas.
An Allen wrench is used to install these screws, allowing access into tight locations where a traditional external hex drive bolt would not fit.
Available in a variety of materials, finishes and head heights, socket head bolts can be used with many different styles of locking and non-locking nuts, tightly clamping together whatever the cap screw is being used to secure.
Allen Bolts may come in either knurled or smooth head style.