The Ilsco PB2-600 is a dual-rated aluminum lug designed for panelboard applications. It features two holes with a 3/8 inch bolt size and a hole spacing of 1-3/8 inches, accommodating a conductor range of 600-2.This aluminum panelboard lug, model PB2-600, is dual-rated and designed for use with conductors ranging from 600 to 2 AWG. It features two mounting holes, each 3/8 inch in diameter, with a hole spacing of 1-3/8 inches.