Shoulder Screw Military Spec 303 Stainless Steel Finish Passivate per QQ-P-35 TYPE 2 Head Style Plain Thread Size 4-40 Drive Type Hex Socket Drive Size 5/64 In Shoulder Dia 1/8 In Shoulder Length 5/16 In Thread Length 5/32 In Head Dia 1/4 In Head Height 1/8 In Shoulder Length Tolerance +/-0.003 In Class 2A Rockwell Hardness 262 HB max. Meets/Exceeds MS51576/MIL-S-21472 Package Quantity 5