Since 1972, Stewart Tool Company has built a reputation on the design, engineering, fabrication and machining of complex, high-precision, close-tolerance parts, pressure vessels, assemblies and tooling. Our clients come from the aerospace, defense, research, energy, and commercial sectors. Stewart Tool Company is authorized by ASME to manufacture Pressure Vessels and has a U stamp. We received our ISO 9001:2008 registration in March of 2009.