About Tri-Mack_x0099_ Plastics Mfg. Corp. For more than a quarter century, Tri-Mack_x0099_ Plastics Manufacturing Corporation has been at the forefront of high-performance thermoplastics manufacturing, providing custom parts for critical applications. We pride ourselves on our customer service, which includes material selection, part design assistance, and process development. Tri-Mack has been awarded many industry accolades and our commitment to quality is reflected in our ISO 9001:2000 and AS9100 certifications. Tri-Mack began as a supplier of machined parts to GE Aircraft Engines and has grown steadily ever since. We have expanded our capabilities to include all types of machining, injection molding, assembly and packaging operations. Due to the demanding requirements of the aerospace industry we have developed the tools to service a wide range of industries including medical, electronics, industrial machinery and chemical processing.