APL is more than just a name. It defines us.
AMERICAN PRECISION LINE MANUFACTURING
Our Story
APL Manufacturing was founded in 2019 with a vision to create a vertically integrated network of specialized manufacturing companies that deliver precision, efficiency, and innovation. Built on a foundation of expertise and specialization, we have grown into a trusted partner for industries requiring high-performance manufacturing solutions.
What sets APL Manufacturing apart is our diverse range of capabilities, spanning EDM machining, brazing, heat treating, laser cutting, metal stamping, photo etching, chemical plating, and plastic injection molding. Each of our strategically located companies plays a critical role in our ability to provide end-to-end manufacturing solutions, ensuring seamless production from raw materials to finished components.
By combining the strengths of our family of companies, we offer a unique blend of innovation and reliability, meeting the evolving demands of industries that require precision-engineered products. Our commitment to quality, continuous improvement, and customer satisfaction drives everything we do.
At APL Manufacturing, we don’t just make parts—we create solutions that power industries and push boundaries.
Plateronics Acquired - 2020
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2021 - X Acquired
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Proto + American Wire Acquired - 2022
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2023 - Chapman Acquired
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Engineered Plastics Acquired - 2024
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2025 - AAA Plating and UDB Corp Acquired
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AAA Plating and Inspection, Inc. began business in 1958. Working within 50,000 square feet of production space, we are the largest vacuum facility in the world. Our process solutions include five types of Anodize, Cadmium Plate, Passivate, Paint services, non-destructive testing, Ion Vapor Deposition of Aluminum, and Vacuum Cadmium.
AEM has been a supplier of precision, high-reliable, thin gauge metal subcomponents to the military, electronics, and high-tech commercial industries for over 40 years. AEM provides full service and support for both prototype and production requirements.
American Wire EDM is an industry leading EDM company. Offering both wire EDM machining and EDM hole drilling services, American Wire EDM utilizes state-of-the-art, CNC-operated production equipment to give customers precision parts and components that match their unique design specifications.
Chapman Engineering is a family owned and operated short run stamping and laser cutting company. For over forty years, they been fabricating brackets, chassis, and small assemblies from their Santa Ana location for every industry imaginable.
County Heat Treat is a third-generation, family-owned and operated business. Based in central Massachusetts, they meet the needs of their customers throughout New England. Whether it’s simple stress relief of a low carbon steel weldment or the exacting specifications of a helicopter drive shaft, County Heat Treat is capable of meeting your thermal processing needs.
East Lind Heat Treat is Southeast Michigan's premier source for quality tool & die and batch production heat treating. Located in Madison Heights, East-Lind Heat Treat, Inc. has been serving metro Detroit's industrial community since 1976 with complete heat treating of all types of metals.
Engineered Plastics is a privately owned, custom plastics manufacturer focusing on your industrial applications. With three locations in northwest Pennsylvania, Engineered Plastics is conveniently situated near Cleveland, Ohio; Buffalo, New York; and Pittsburgh, Pennsylvania.
Plateronics Processing is a metal finishing job shop with over 100 years of combined experience in the metal finishing industry located in Chatsworth, California. Plateronics Processing facilities are geared to today’s precise and rigid aerospace plating requirements.
Plymouth Brazing provides high quality, tight tolerance assemblies that consistently meet customer specifications and demands. Their expertise combined with their controlled atmosphere brazing and post braze testing/gauging equates to world class product every time.
Prototype & Short-Run Services is a leading metal stamping job shop specializing in precision metal stampings and prototype parts since 1990. Based in Orange, California, Prototype & Short-Run Services supports the needs of a broad range of industries, from aerospace to instrumentation to medical equipment.
Our Manufacturing Teams specialize in precision quality drill bushings, drill jig fixturing, hardware, tooling components, fasteners, inserts, tool-holding, lifting devices, clamps and clamping assemblies, aircraft and automotive tools, adapters and adapter tips, drill riveter tools, plus United's own custom and standard Tooling Kits for aerospace and automotive retrofit and repair.