Since 1969 Roncelli Plastics has been recognized as a world-class supplier of plastic and non-metallic machined parts. Many of the largest and most technologically advanced companies in the United States and across the globe entrust Roncelli Plastics with their plastic and non-metallic components. . Finished components are delivered companies such as Boeing, Raytheon, Honeywell, Northrop Grumman, Lockheed Martin, NASA, and hundreds of other companies. Roncelli Plastics has the capability and the capacity to manufacture components from the conceptual/Research and Development stage through prototyping and on to full production. It has two buildings totaling 37,000 square-feet. The company is located in Monrovia, Calif.
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