Three Sigma

At Three Sigma Mfg., Inc., we excel as a leading supplier of precision machined products, leveraging over 40 years of experience. Our state-of-the-art 46,000 square foot facility in Kent, WA is equipped with advanced CNC Mills, Lathes, Grinders, Wire EDMs, and unique Inertia Welding technology, catering to complex manufacturing needs. Specializing in aerospace, we offer a comprehensive suite of services including CNC milling, turning, grinding, and engineering with a steadfast commitment to quality and innovation.