X0101 EFFECT 33 LIVE 2012-06-12 09:00:00

S-4

0000018172 CASTLE A M & CO 333-180662 0001545604 Tube Supply, LLC 333-180662-08 0001545602 Advanced Fabricating Technology, LLC 333-180662-07 0001545607 Keystone Tube Company, LLC 333-180662-06 0001545606 Oliver Steel Plate Co. 333-180662-05 0001545611 Paramont Machine Company, LLC 333-180662-04 0001545603 Total Plastics, Inc. 333-180662-03 0001545605 Transtar Inventory Corp. 333-180662-02 0001545685 Transtar Metals Corp. 333-180662-01