Tin Plated Aluminum Mechanical Lug, #4 - 600 kcmil, Dual Rated Copper and Aluminum, 90 Degree C, UL listed. Length 3-3/16 inch, Width 2-3/8 inch, Height 1-9/16 inch, Pad Thickenss 7/16 inch with One 17/32 inch Diameter Hole and Anti-Rotation Bar on Bottom of Connector. Two Transverse Taps - 7/8-15 UNF-2B x 1.115 inch Deep on 1.225 inch Center. Includes Two Tin Plated Aluminum 7/8-14 x 1.062 inch Set Screws.