ILSCO Box-Type Mechanical Lug, Mechanical connection, Dual Rated, Aluminum material, Tin plated connector,1 mounting hole(s), mounting bolt/stud size 1/4-20 in, UL 486A/B Recognized, C22.2 No. 65-03, Copper/Aluminum Primary Conductor 250 kcmil - 6 Str, 1 conductors, 1 ports/wireways, Drive Type Main 5/16 Internal Hex, rated for 35 kV, primary color Silver, 1 poles,