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Socket Head Shoulder Screws, Class 12.9

A shoulder screw differs from machine screws in that the shank is held to a precise diameter, known as the shoulder, and the threaded portion is smaller in diameter than the shoulder. Socket Head Fasteners have a hexagonal recess and may be driven by a hex wrench, driver or bit. Hi-Line carries Socket Head Shoulder Screws, Class 12.9 in many sizes.