J&H Trucking, 318 S Worth Ave, Indianapolis, IN 46241, US

Established in 1949, Precision Rings Inc. is a custom designer and manufacturer of various varieties of high temperature piston and seal rings. Based in Indianapolis, Ind., it serves a wide spectrum of industries, including aircraft, aerospace, industrial valve and power generation (gas, steam, commercial and naval nuclear). The company, an ISO 9001:2000 and AS9100: B approved firm designs products meeting the demands of the operating conditions like low leakage, high temperatures, good material compatibility and severe environments. Precision Rings Inc. s applications include gas turbines, jet engines, rockets, steam valves, nuclear oil exploration and liquefied coal.