At BelleFlex™ Technologies, we are committed to customer satisfaction. Through our free rapid quotes, no-cost engineering design support, and 24/7 availability, we consistently demonstrate our commitment to meeting and exceeding our customers’ expectations. We are a wholly-owned subsidiary of Blair Strip Steel Company, which has specialized in precision processing of heavy gauge cold rolled strip steel since 1923. Our Belleville disc springs are manufactured to the same quality standards that have made Blair a leader in manufacturing. With years of engineering experience, we can assist you at no cost in every facet of your engineering project, from advising you on the use of Belleville disc springs in your application to the custom design of Bellevilles and solutions to meet your requirements.

BelleFlex™ operates a 30,000 square foot manufacturing facility in southwestern Pennsylvania. Our state-of-the-art facility guarantees fast turnaround for custom orders, while our large selection of in-stock parts enables same-day shipping for standard sizes.

BelleFlex™ products can be supplied with a certificate of compliance to insure conformance with applicable specifications. A test report is also available which may contain items, such as chemical analysis, mechanical test results, dimensional characteristics, or other application-specific requirements.

BelleFlex™ is committed to innovation. Our engineers are always available to provide assistance in research and development. The technologies we utilize facilitate rapid calculations. Designing Belleville disc springs for new and unique applications is a focus of our company.


Bruce Kinney, President of
Blair Strip Steel Company