Roncelli GreenRoncelli Green
We are proud of our environmental efforts. Learn more about what we are doing.




roncelli cleanRoncelli Clean
With our clean room capabilities, We provide
Cleaning and Clean Assembly services.




roncelli edgeR.P.M.
Rapid Protype Manufacturing... To suit your imediate needs fast.

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787
Roncelli Plastics contributs to Boeings latest high profile projects.

C-17
Roncelli Plastics contributs to Boeings latest high profile projects.

Mars Rover
NASA/JPL recognized Roncelli Plastics for the contributions to the Mars Rover Project

Since 1969

Roncelli Plastics Inc. is a design to product resource center for plastic components and assemblies. Located in Monrovia, CA, Roncelli supports applications across varied industries. Whether it is a dynamic hose harness for a jet engine, a high temperature bracket for rocket’s propulsion system, a clean component for the medical device or semiconductor industries, or a low friction bushing for a wind turbine, Roncelli has the expertise to make sure that your design becomes a functioning part.

Turning 40... gracefully

Roncelli Plastics Inc celebrated its 40th anniversary, December 2008. The event was celebrated by more than 150 guests with United States Congressman David Driers representative and Monrovia Mayor Rob Hammond honoring founder Gino Roncelli for this outstanding achievement.

Founded in 1969 with just 3 employees in a 800 square foot warehouse, Roncelli Plastics Inc. transformed itself into a world class manufacturer of plastic and non metallic parts serving customers from NASA to Boeing . Roncelli Plastics' awards include: AS9100 Certification, ISO9001 Certification, Boeing’s Preferred Supplier Certification – Silver Level. Today there are more than 40,000 square feet of production space and more than 65 employees.

Riley Cole, President, “The common bond that exists for all of our customers is their absolute need to receive a quality product, take delivery of that product in a timely manner, and do so at a competitive price. Full, documented quality systems are in place and are available for review at any time. For non-metallic machined and fabricated components, die cut parts, and sub-assemblies, your best choice is Roncelli Plastics.”