Milwaukee-Area Contract Manufacturer of Precision Plastic and Metal Parts and Components, With Value-Added Services

Dielectric Manufacturing is a leading, single-source contract manufacturer of plastic parts, metal parts, carbon fiber parts, components and assemblies. We are based in metropolitan Milwaukee, Wisconsin but serve businesses nationwide. We machine and fabricate a wide variety of materials, including thermosets, thermoplastics, non-ferrous metals, and, at our Waupaca, Wis. facility, ferrous metals.

We offer machining, fabrication and related value-added services at three locations in Wisconsin and Iowa, making us a preferred single-source contract manufacturer for plastic parts in Milwaukee, southeastern Wisconsin, and nationwide.

More than 55 Years of Plastic Contract Manufacturing in Wisconsin

We were founded in 1966 under the name Dielectric Corp., but changed our name in 2019 to reflect our broad range of capabilities in plastics contract manufacturing and metal parts and assemblies work. We have grown a lot in 55+ years to become one of the preferred plastic manufacturers in Wisconsin.

New Milwaukee-Area Facility Increases Capacity, Efficiency

In 2020, we opened a newly built 100,000-square-foot facility in Richfield, Wis., just northwest of Milwaukee. With this new facility, we are able to offer even greater plastic parts production efficiencies that benefit our customers. Read more.

Our postal address is W206N12865 Gateway Court, Richfield, WI 53076. The location offers us fast and easy access to Interstate 41/U.S. Highway 45 – a major travel and shipping route serving the Milwaukee area and the rest of Wisconsin.

vision, mission, valuesPlastics and Metals Contract Manufacturer for Diverse Industries, Business Sizes

Dielectric Manufacturing customers rely on our family of employees to deliver unparalleled, value-added solutions in design collaboration, prototyping, component manufacturing, assembly, packaging, and inventory services. 

The highly knowledgeable Dielectric Manufacturing team is known for being a reliably attentive contract manufacturer to a wide variety of businesses, including Fortune 500 companies.

Custom precision components that we manufacture on a contract basis become part of equipment used in diverse industries, including defense, aerospace, health care, food processing, wind power generation, gas & oil, power distribution, and agriculture.

The high quality plastic parts and metal parts we manufacture are used by original equipment manufacturers (OEMs) and other contracting manufacturers in the greater Milwaukee area and worldwide. See examples of parts we have created.

Our single-source approach assures that our customers benefit from the greatest efficiencies and responsiveness to time-sensitive deadlines – helping to position us as one of the preferred plastic manufacturers in Wisconsin.

Dielectric Manufacturing holds ISO 9001-2015 certification.

For reliable plastics contract manufacturing and metal contract manufacturing services near Milwaukee, contact Dielectric Manufacturing.

Contract Manufacturer value added services

Contract Manufacturing
Value-added Services

  • Design collaboration
  • Prototyping of plastic parts and metal parts
  • Welding
  • Flame polishing, buffing and sandblasting
  • Painting and silk screening
  • Special finishes
  • Insertion of component elements
  • Complete assembly and sub-assembly
  • Packaging –ranging from assembly kits to complete finished packaging
  • Inventory management
  • Delivery programs

Formerly Known as Dielectric Corporation

We have been a contract manufacturer of custom parts for more than 55 years, and formerly operated as Dielectric Corporation. Optimizing cost and performance is something we do every day to benefit our customers. No matter the size or complexity of your order, we will ensure you achieve the best results.

Our main office and contract manufacturing plant is in the metropolitan Milwaukee community of Richfield. Additional manufacturing plants are in Waupaca, Wis., and Lake Mills, Iowa, giving us the capacity to meet customer deadlines for contract manufacturer plastic parts, metal parts, carbon fiber parts, and assemblies.

We are members of the Germantown (Wis.) Chamber of Commerce. See our listing.

Contact contract manufacturer Dielectric Manufacturing near Milwaukee for a quote on a project, or to learn more about our full range of services relating to component fabrication. Call 800-367-9122, use our Quick Contact form, or our Request a Quote form.

Leave a Google Review about our precision fabrication.

“Our Dielectric Manufacturing sales rep pays a lot of attention to us. He makes me feel like it’s more of a partner relationship and not just a vendor situation.”

Dielectric Manufacturing Knowledge Base


Learn about metal and plastic properties, see answers to frequently asked questions about parts and assemblies, and get other information on component fabrication and machining.

contact Dielectric Manufacturing


Need more information about plastic, carbon fiber or metal component fabrication and assembly? For contract manufacturing and more, call us in metro Milwaukee at 800-367-9122, or email