As the inventor of the edgewound wave spring and with over 100 years of manufacturing excellence, Smalley is the Engineer's Choice® in providing Crest-to-Crest® wave springs, Spirolox® retaining rings, and constant section rings. We stock over 10,000 standard parts across 30 configurations and 400 sizes, ready for delivery. If a standard part doesn't meet your needs, designing a custom is our specialty.