The BURNDY FCB634N 4-hole T-connector transformer tap adapter is designed for reliable electrical performance. Key features include 4-Hole T-Connector, 4 Holes, 9/16 in Hole, 1/2 x 2-1/4 in Stud, Cast Copper Alloy, Tin Coated, 3-3/4 in L x 5-1/4 in H x 1/4 in THK Dimensions.