'Shoulder Screw, Precision, 18-8 Stainless Steel, Plain Finish, Hex Socket Drive Type, Drive Size 5/64, Thread Size 4-40, Shoulder Dia 1/8 In, Screw Shoulder Length 1/2 In, Thread Length 5/32 In, Head Dia 1/4 In, Head Height 1/8 In, Shoulder Dia Tolerance -0.001 In, Shoulder Length Tolerance +0.002 In, Min Tensile Strength 90, 000 PSI, Class 2A, Rockwell Hardness B95-B100, Meets ASME/ANSI B18.3.3, Package 10'