Tin Plated Aluminum Dual Rated Mechanical Lug, #4 - 600 kcmil, Copper and Aluminum, Temperature Rating of 90 Degrees C, CSA/UL Listed. Bolt 1/2 Inch. Length 2-3/4 inch , Width 1-3/8 inch, Height 1-1/2 inch. Pad Thickness 5/16 inch with One 9/16 inch Diameter Hole and Anti-Rotation Bar on Bottom of Connector. Tapped 7/8-14 UNF-2A. Includes One Tin Plated Aluminum Set Screw 7/8-14 UNF-2A x 1-1/16 inch Long with 1/2 inch Hex Head. 100 Pieces