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Defense & Military Spring Manufacturer

Century Spring is a trusted provider of springs and metal springs for defense, military, and marine applications.

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Century Military and Defense Manufacturing

Century Spring has developed a reputation for manufacturing high-quality, reliable, and durable springs for military and defense applications. We stock and manufacture fully traceable and certified NAS and MS parts. With in-house tooling, lab, and additional secondary processes, we are a one-stop-shop for all types of military springs.

Variable Wire Diameter Capabilities for Military Spring

We consistently invest in new technology and processes, allowing our teams to manufacture springs such as variable springs that are up to 10% lighter than comparable spring designs. Variable springs also have lower solid heights, require less space, and offer better fit and function with mating parts than conventional spring designs.

Defense at a Glance






ITAR Compliant



QSLM Class 2 and 3 CAGE Code Number 6Z992


TS 16949





Heavy Truck & Bus

Catalog and Custom Defense Springs

Our defense products include coil suspension springs, vehicle-mounted military antenna springs, and heavy-duty springs for armored personnel carriers and MRAP vehicles. Whether your project focuses on military & defense needs or is a marine application, you can count on us for the certifications, processes, and support you need for all vehicle applications.

We're known for our ability to solve difficult problems through innovative military spring designs. Our military vehicle antenna springs, for example, leverage a unique design that reduces the likelihood that the antenna will be knocked off the vehicle while in the field. We work closely with our customers to identify these types of opportunities for improved performance in order to provide a strong competitive advantage.

Custom Defense & Military Manufacturing

With the best engineers and support staff in the industry, we provide expert design assistance so you receive the military springs you need for mission-critical performance. From Belleville washers, disc springs, and retaining rings to metal stampings and wire forms, we manufacture precision parts to your specifications.

What We Offer

Reliable Manufacturing Services

Our technology advantage makes a world of difference in the production of military-grade springs. We invest in our customers and their needs, which has resulted in high-value products that give our customers a competitive advantage. Our military antenna springs are unique, with a vehicle-mounted design that helps ensure antennas don't fall or get knocked off the vehicle while in the field.

That same innovation is shown in our other products and our investment in new technology, including machines with variable wire diameter capabilities that allow us to better serve our defense customers. Contact us to see how our expertise could give your project the advantage it needs.

  • CAD Modeling
  • Hardening & Tempering
  • Heat Treatments
  • Rapid Prototyping
  • Stress Relief

Quality Materials

If you’re building a state-of-the-art armored vehicle or other defense, you can rely on our design expertise, world-class materials, and in-depth knowledge of the manufacturing process to ensure delivery of the highest quality parts.

  • Carbon Steel
  • Chrome Vanadium
  • Elgiloy®
  • Hastelloy®
  • Inconel®
  • Monel®
  • Stainless Steel

We’re Your Partner for Defense and Military Vehicle Manufacturing

Our team is quick to share our knowledge of materials, processes, and manufacturing to help achieve your goals for safety, performance, and durability. With our near 100 years of experience, we offer the products, services, and financial stability you require to keep your operations on track and on budget.

Get Custom Defense Springs

With the latest technology and experienced design engineers, we can help you manufacture your custom defense part quickly and cost effectively.