Aluminum Mechanical Lugs Three Conductors - Two or Four Hole Mount 250MCM-#6 Awg - 2 or 4 Hole Aluminum Mechanical Connectors provide for Flexibility in Installation.Aluminum Mechanical Lugs 3 Conductors - 2 or 4 Hole Mount 250MCM-#6 Awg features include: 6 Mounting Holes in Pad allow for either 2 or 4 Bolts when Mounting these 3 Conductor Mechanical Lugs 3 Conductor Aluminum Mechanical Connector is manufactured from high strength 6061-T6 Aluminum Alloy to insure both maximum strength and conductivity AL9CU Dual Rated for both Copper and Aluminum Conductors Electro-Tin Plated to provide low contact resistance and protection against corrosion Assembly can be made with only a screwdriver or allen wrench and they are re-usable NEMA Standard Mounting Hole Drilling 1-3/4 Centers Aluminum Connector is rated 600V 194deg;F (90deg;C) UL486B/CSA Listed Dimension Measurements = Inches Order Qty of 1 = 1 Piece Below is more info on our Aluminum Mechanical Lugs Three Conductors - Two or Four Hole Mount 250MCM-#6 Awg