Mechanical Connector For Conductor Material Aluminum Copper For Stud Size 5/16 in Head Style Hex Hole Diameter 0.33 in Body Material Aluminum Number of Conductors 1 Connector Type Transformer Lug Kit Compatible with Product Type Aluminum Cable Copper Cable Connection Orientation Dual Rated Lug Contact Finish Tin Includes (12) KA29U (16) 1/4-20 in Hex Head Nut (8) 1/4-20 x 2 in Hex Head Bolt (8) 1/4-20 x 3/4 in Captive to Nut Overall Depth 7 in