Shoulder Screw, Shoulder Screw Type Standard Shoulder Screw, Head Type Low-Profile Standard, Drive Type Socket, Material Stainless Steel, Material Grade/Class 316, Finish Plain, System of Measurement Inch, Thread Size 1/4 In.-20, Minimum Thread Length 3/8 in, Shoulder Length 1/4 in, Shoulder Length Tolerance -0.0 in to +0.002 in, Shoulder Diameter 5/16 in, Shoulder Diameter Tolerance -0.001 in to +0.0 in, Pack Size Small Pack, Head Height 1/8 in, Head Diameter 7/16 in