Shoulder Screw Standard 316 Stainless Steel Head Style Socket Thread Size 3/8-16 Drive Type Hex Drive Size 1/4 In Shoulder Dia 1/2 In. Shoulder Length 3/4 In Thread Length 5/8 In Head Dia 3/4 In Head Height 5/16 In Shoulder Length Tolerance 0.010 In Min In Tensile Strength 70 000 PSI Rockwell Hardness B55 Package 2