Catalog    Search    Main Categories > Rigging > Steel Fittings > Spelter Sockets Open Spelter Sockets Forged Steel Sockets thru 1-1/2", cast alloy steel 1-5/8" thru 4". Spelter socket terminations have an efficiency rating of 100%, based on the catalog strength of wire rope. Ratings are based on recommended use with 6 x 7, 6 x 19, or 6 x 37, IPS or XIP (EIP), XXIP (EEIP), RRL, FC, or IWRC wire rope.