Injection Molding Solutions in Pittsburgh, PA

Quality, Efficiency, and Precision in Every Project


Your Trusted Partner in Injection Molding Solutions

Founded in 1996 by Nick Karnavas, a Penn State University graduate with a B.S. in Chemical Engineering, NZK Plastics, LLC has been a cornerstone in the plastics industry for over two decades. Starting with just one injection molding machine, we've grown to operate 7 molding machines with clamp tonnages ranging from 50 to 400 tons.

Our Mission

To deliver top-quality, custom injection molding solutions with a customer-first approach.

Our Vision

To be Pittsburgh's leading provider of innovative, high-quality injection molding services.

Reach Out If You Have Any Questions

(412) 823-8630 [email protected]


Solutions We Can Offer to You!

Injection Molding

Utilize our state-of-the-art injection molding machines, ranging from 50 to 400 tons, for high-precision and efficient production.

Rapid Prototyping

Accelerate your time-to-market with our rapid prototyping services, offering quick and cost-effective model creation for design validation.

Part Design with CAD

From initial concept to final product, our experts provide tailored part design and modification services to meet your unique requirements.

Quality Assurance

We don't just prioritize top-notch injection molding solutions; we ensure that every part we produce meets the highest standards of quality.

Tooling Capabilities

Optimize your production with our custom tool development services, designed to create single or multi-cavity molds for efficiency.

Secondary Operations

We ensure your products are refined and ready for market. From sonic welding to solvent welding, we handle every detail with precision.



Projects Completed



Years of Experience



Injection Molding Machines


What Our Clients Are Saying

NZK Plastics, LLC has been our go-to injection molding partner for years. Their attention to detail and commitment to quality is unparalleled. Highly

John D. Automotive Industry

We've worked with NZK Plastics on several critical projects, and they've always delivered on time and within budget. Their engineering services are top-notch,

Sarah L. Medical Devices Manufacturer

NZK Plastics is incredibly responsive and knowledgeable. They helped us navigate material selection and even suggested design modifications that saved us money.

Mike H. Consumer Electronics

"Our goal is to deliver top-quality, custom injection molding solutions with a customer-first approach."