Socket head cap screws, also known as Allen head screws or hex socket head cap screws, are precision fasteners characterized by a cylindrical head with a recessed hexagonal socket. This internal drive design allows for high torque application in confined spaces where traditional external drive screws cannot be used. Available in both metric (ISO 4762 / DIN 912) and inch (ASME B18.3) series, these screws are widely used in precision machinery, automation equipment, mold making, and high-strength structural applications.
Socket Head Cap Screw Size Chart – ISO 4762 / DIN 912 Metric Dimensions
Socket Head Cap Screw Size Chart – ASME B18.3 Inch Dimensions
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