Bolt Tensioners: American Zettler Inc: Relay Sensor: Ameridrives Couplings (Altra) Inc (AST) Pressure Transducers Cylinder Pressure Sensor: American Sensors Corp: Hot Metal DetectorAmerican Pulverizer: Shredder Rings: American Sensor Technologies Color Pyrometer: American Torque Wrench Inc: Hydraulic Torque Wrench