.1/4"-20 Socket Head Cap Screw, Plain Steel, 1/2 in Length, 10 PK A hex key is required to tighten or loosen a socket screw. Socket screws are commonly used in assemblies that do not provide sufficient clearance for a conventional wrench or socket.
3/8"-16 x 2-1/2" Zinc Plated Grade 5 Steel Coarse Thread Carriage Bolts 6PK The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened..
Socket screws are commonly used in assemblies that do not provide sufficient clearance for a conventional wrench or socket..#8-32 Socket Head Cap Screw, Plain Steel, 3/4 in Length, 100 PK A hex key is required to tighten or loosen a socket screw.