Item #: 85516805Brand: Strong Hand ToolsModel #: 31706 Features and Benefits Hex socket drive types have a hex-shaped recess in the head and are driven with hex keys or hex socket bits. The driving surface is protected from external damage and provides six sides of contact surface for added torque. Steel is strong and durable but less corrosion resistant than stainless steel. To improve its resistance to corrosion, it may receive additional finishes and coatings. Product Specifications Type Shoulder Screw System of Measurement Inch Shoulder Diameter (Inch) 3/4 Shoulder Diameter (Decimal Inch) 0.7500 Thread Size 5/8-11 Shoulder Length (Inch) 5/8 Drive Type Hex Socket Material Grade 1137 Material Steel Finish/Coating Black Oxide Head Height (Inch) 1/2 Thread Standard UNC Hex Key Size (Inch) 3/8 Head Diameter (Inch) 1 Thread Depth (Inch) 7/8