Shoulder Screw Standard Alloy Steel Plain Finish Head Style Knurled Thread Size 5/16-18 Drive Type Hex Socket Drive Size 3/16 Shoulder Dia 3/8 Shoulder Length 3 Thread Length 1/2 Head Dia 9/16 Head Height 1/4 Shoulder Length Tolerance +/- 0.005 Screw Head Dia 0.562 Min Tensile Strength (PSI) 160 000 Shear Strength (PSI) 96 000 Temp Range (F) 50 to 550 Class 3A Rockwell Hardness 36 to 43 Meets/Exceeds ANSI/ASME B18.3 Package Quantity 25