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MIL‑SPEC Springs Ready for Immediate Delivery

Lee Spring MIL‑SPEC Compression and Extension Springs in stock and ready to ship. Enjoy simplified pricing, free ground shipping on qualifying orders, and no added fees for certifications or traceability. All springs meet strict U.S. Defense Standards and are made from authorized materials for trusted performance. Shop online today and get fast delivery on high‑precision MIL‑SPEC parts.
MIL-SPEC Compression Springs

MIL-SPEC Extension Springs

Lee Spring Engineering

For over 100 years, Lee Spring has been manufacturing, engineering, and designing springs, formed metal parts and related products for a wide variety of industries. Lee Spring engineers can offer assistance from design conception through production. Lee Spring's extensive expertise in spring design and mechanical engineering will compliment your design team. Submit a Quote Today

Two Units, One Value

Understanding Spring Load Units: lbf vs lb

Spring specifications often appear with loads listed in "lbs" in commercial catalogs and "lbf" on engineering drawings. While the two units carry different technical meanings, their numeric values are identical for standard Earth-based applications. This resource outlines when each unit is appropriate and the contexts in which precision matters most. Learn More About lbf vs. lbs for Springs