Ilsco Panel board stack mechanical lug is made of 6061-T6 aluminum alloy for added strength and long lasting durability. It comes with 1/2 Inch hex socket screw and features electro-tin plating that offers resistance to corrosion and durability. It has accommodates 1/2-Inch bolt/stud and has mounting hole spacing of 1-3/4 inches. It measures 5.6875 Inch x 2.4688 Inch x 3 Inch. Lug can be used with either copper/aluminum conductors and accommodates conductor of size 600 kcmil - 2 AWG.Lug is ideal for use in circuits rated up to 35 kilo-Volts. Lug is suitable for use with terminating connector. The four-port lug has stacked design and can be easily installed with chamfered wire entry. It has two pad holes and a pad measuring 2-11/32 Inch x 2-15/32 Inch x 3/4 Inch. Panelboard stack lug is UL listed and CSA certified. Also known as -Ilsco PB4-600-2N Panel Board Stack Mechanical Lug Connector 1/2 Inch Bolt Size