Shoulder Screw, Self-Locking Precision, 18-8 Stainless Steel, Head Style Standard, System of Measurement Inch, Thread Size 4-40, Slotted Drive Type, Shoulder Dia. 1/8 in, Shoulder Length 1/4 in, Thread Length 5/32 in, Head Dia. 1/4 in, Head Height 1/8 in, Shoulder Length Tolerance .002 in, Min. Tensile Strength (PSI) 116,000 psi, Temp. Range (F) -70 Degrees to 250 Degrees , Class 2A, Rockwell Hardness B95, Meets/Exceeds ASME/ANSI B18.3.3, Package Quantity 5