001 in to +0.Shoulder Screw, Shoulder Screw Type Standard Shoulder Screw, Head Type Ultra-Low-Profile Standard, Drive Type Socket, Material Stainless Steel, Material Grade/Class 316, Finish Plain, System of Measurement Inch, Thread Size #2-56, Minimum Thread Length 1/8 in, Shoulder Length 1/4 in, Shoulder Length Tolerance -0.