Cylindrical Socket Head Cap Screws
Standard socket head cap screws (allen cap screws) possess a cylindrical head with a flat, chamfered top surface and a recessed socket drive. The outer sides of the cylindrical cap are commonly knurled. The cap can be situated either above the surface or recessed into a counter-bored hole. Ideal for precision assembly work as well as applications which require a neat, finished appearance, standard socket head cap screws offer a clean look along with maximum strength. Standard head caps are crafted from alloy steel, stainless steel, nickel alloy and silicon bronze. Available finishes include black oxide, zinc and plain while the majority of the standard fasteners conform to ASME B18.3, DIN 912 or Din 912/ISO 4762 specifications. An allen wrench (hex key) is needed for installation and removal.