ILSCO Spade Type Transformer Lug, Mechanical connection, Dual Rated, Aluminum alloy 6061-T6 material, Clear plated connector,2 mounting hole(s), mounting bolt/stud size 1/2 in, Copper/Aluminum Primary Conductor 500 kcmil - 2 Str, Contains DE-OX®, 6 conductors, Drive Type Main 5/16 Internal Hex, rated for 600 V, primary color Silver,