When the world’s most demanding industries need reliable, high-performance metal finishing services, they turn to The Lindgren Group. With decades of experience and a deep commitment to precision, we provide custom coating solutions that meet the highest performance, durability, and compliance standards.

From gold plating for mission-critical electronics to hardcoat anodizing for structural aerospace components, our finishing capabilities protect your parts—and your reputation—across the most demanding operating environments.

Whether you’re a national OEM or a regional supplier, you need a finishing partner who understands your industry, your challenges, and your deadlines. The Lindgren Group delivers all three.

What Is Metal Finishing?

Metal finishing is the process of altering a metal’s surface to enhance its performance and appearance. It’s a critical step in manufacturing that improves:

  • Corrosion resistance
  • Wear and abrasion resistance
  • Electrical conductivity
  • Aesthetic appearance
  • Solderability and bonding

Whether you’re designing for space, the battlefield, or the production floor, the right finish ensures that every part performs exactly as intended.

Our Metal Finishing Capabilities

At The Lindgren Group, we provide a full range of electroplating and anodizing services tailored to meet specific functional and regulatory requirements.

Gold Plating

Gold offers unmatched conductivity and corrosion resistance, making it the top choice for:

  • Aerospace avionics
  • Defense communication systems
  • High-reliability circuit boards
  • Medical devices
  • RF and microwave connectors

We provide MIL-G-45204 and ASTM B488 compliant gold plating, with precision control over deposit thickness and surface finish.

Hardcoat Anodizing (Type III Anodize)

Used extensively in aerospace and military applications, hardcoat anodizing creates a thick, durable oxide layer on aluminum that resists:

  • Abrasion and mechanical wear
  • Salt, humidity, and chemical exposure
  • Electrical conductivity (with optional dielectric properties)

Our hardcoat anodizing process meets MIL-A-8625F Type III standards.

Zinc Nickel Plating

As a cadmium-free, RoHS-compliant alternative, zinc nickel plating is ideal for components exposed to extreme corrosion:

  • Aircraft frames and fasteners
  • Military ground vehicles
  • Automotive underbody systems
  • Harsh industrial environments

With corrosion resistance exceeding 1,000+ hours in salt spray testing, this finish extends component life while reducing environmental impact.

Silver Plating

Silver plating provides the highest electrical and thermal conductivity of any metal—making it ideal for:

  • Power distribution systems
  • High-frequency connectors
  • RF and microwave communication
  • High-temperature industrial applications

We offer both bright and matte silver options, compliant with AMS 2410 and ASTM B700.

Tin Plating

Tin plating is a cost-effective solution for electronics and industrial components requiring:

  • Excellent solderability
  • Oxidation protection
  • Compatibility with copper, brass, and other non-ferrous alloys

We support MIL-T-10727 and ASTM B545 tin plating standards, suitable for high-volume production.

Connector Plating

Connector performance is only as good as the finish. We provide precision plating for connectors in gold, silver, or tin, tailored to your current, frequency, and durability requirements.

Applications include:

  • Avionics and satellite connectors
  • Military-grade interconnects
  • Telecom infrastructure
  • Medical device I/O systems

Industries We Serve

We serve customers across the U.S. in industries where performance is mission-critical:

Aerospace

  • Structural anodizing for lightweight components
  • Gold-plated connectors for cockpit and control systems
  • NADCAP-approved finishing processes

Defense

  • MIL-SPEC compliant coatings
  • Hardcoat anodizing for rugged equipment
  • Plating solutions for ground vehicles, weapons, and communications

Electronics & Telecommunications

  • Connector plating for signal integrity
  • Tin and silver plating for circuit boards and enclosures
  • Finishes that meet IPC standards

Automotive & EV

  • Corrosion-resistant plating for battery terminals, connectors, and hardware
  • Zinc nickel and silver finishes for high-voltage and underbody systems
  • Lightweight aluminum anodizing for EV platforms

Energy & Industrial Equipment

  • Long-lasting finishes for renewable energy infrastructure
  • Connector plating for high-amperage power systems
  • Hardcoat anodizing for valves, housings, and moving parts

Why Choose The Lindgren Group?

✔️ Certified & Compliant

We maintain NADCAP, ISO 9001, MIL-SPEC, and RoHS certifications, giving you peace of mind that every part meets exacting standards.

✔️ Scalable Capacity

From short-run prototypes to national production contracts, we have the facilities and flexibility to support your workflow.

✔️ Technical Expertise

Our team partners directly with engineers, buyers, and quality control leaders to ensure materials, finishes, and processes align with your specs.

✔️ Full Traceability

We provide complete documentation and lot traceability for every order—ideal for regulated sectors and defense contractors.

Serving Clients Nationwide

While our facilities are based in the United States, our reach is national. We serve companies coast to coast, including major manufacturing hubs in:

  • California
  • Texas
  • Florida
  • Michigan
  • Illinois
  • Ohio
  • New York
  • Minnesota
  • Washington
  • Colorado

Whether you’re shipping components across the country or sourcing partners for multi-location manufacturing, The Lindgren Group is your trusted finishing resource.

Request a Quote Today

Your project deserves a finish that goes the distance. Trust The Lindgren Group for precision metal finishing that meets your performance, compliance, and delivery expectations.