Profile: Trayer Products, Inc. manufactures & supplies products to heavy truck, off-highway, construction and agricultural fields. We are an ISO 9000 and 14001 certified company. We manufacture hardened & ground shafts, king pins, linkage pins, spring hanger pins, welded fabrications and related chassis parts in a wide variety of sizes. We also offer different types of welded pins such as flag pin assembly, control shaft assembly and ring pin assembly.