About Us
A Legacy of Precision and Performance
At BelleFlex® Technologies, we are dedicated to delivering high-performance Belleville disc springs engineered for reliability and precision.
As a trusted U.S.-based manufacturer, we serve customers across industries who demand application-specific solutions, quick lead times, and direct engineering support.
We are proudly ISO 9001 certified and ITAR registered, reinforcing our commitment to quality and accountability.
With more than 100 years of combined engineering and manufacturing expertise, BelleFlex is not just a spring manufacturer—we are a solutions partner, offering a level of service and communication that sets us apart.
BelleFlex quality and safety programs insure successful mission-critical and severe service applications, where failure is not an option.
What to Expect: The BelleFlex Process – Custom Projects
1. Submit Your Free Quote Request
Start by filling out our easy online form—it’s quick, free, and the first step to getting what you need.
2. Connect With Our Engineering Team
Our team of engineers will reach out directly to understand your exact specifications—no middlemen, no confusion.
3. Receive Your Custom Quote
We’ll provide a detailed quote tailored to your project for clarity, accuracy, and peace of mind.
Why Choose BelleFlex: The Benefits
Direct Access to Engineering
Work one-on-one with our experienced engineering team from start to finish.
24/7 Emergency Support
We’re available when you need us—even outside standard business hours.
Fast Shipping From Stocked Inventory
Our extensive in-house inventory of Belleville disc springs ensures fast turnaround and reduced downtime.
Peace of Mind
Every project is carefully reviewed to ensure your specifications are met with precision and efficiency.
Experience You Can Trust
With over a century of combined engineering knowledge, BelleFlex delivers durable, high-performance spring solutions that meet the most demanding applications.
Backed by Industry Leaders
BelleFlex® is proud to be part of a strong manufacturing network that enhances our capabilities and builds customer confidence:
Founded as a specialist in fiberglass-reinforced polymers and custom composite pultrusions, PulFlex produces high strength-to-weight ratio materials and hybrid resin systems for specialty applications. As our sister company, PulFlex brings deep technical know-how in composite materials, enabling us to extend our engineering support and material versatility.
Our parent company, Blair Strip Steel, has been a leader in cold-rolled strip steel processing since 1923. Known for exceptional precision and unwavering commitment to quality, Blair’s nearly century-long legacy reinforces the stability, integrity, and material expertise behind every BelleFlex® product.
Blair is one of America’s oldest companies, founded in 1783 as a small iron furnace in Pennsylvania making horseshoes, hardware and tools. In the 1800’s Blair was at the heart of America’s Westward expansion producing railroad rails. In the 1900’s Blair supported America’s automotive boom as a specialty steel mill. And in the 2000’s, we’re a specialist in high tech material science, expanding into composites, springs and spring systems for energy, aircraft, space craft, drones, data centers, AI hardware and the International Space Station.
Together, this family of companies ensures you benefit from advanced material sourcing, trusted technical support, and long-term reliability at every stage.
Let’s Work Together
Fill out the quote form below to get started—we look forward to supporting your next project.