Lock Nuts
Cage nuts are specialized captive fasteners consisting of a square or rectangular threaded nut loosely housed within a flexible spring-steel cage. The cage features compressible wings that snap securely into pre-punched square holes, while the loose housing allows the nut to "float" to compensate for slight alignment tolerances during blind assembly. Manufactured from high-strength carbon or stainless steel, these vibration-resistant fasteners are the industry standard for mounting equipment in 19-inch IT server racks, industrial control panels, and automotive thin-gauge sheet metal structures.
Cage nuts are specialized captive fasteners engineered to streamline blind assembly processes and secure components to thin-gauge materials. The fastener consists of a square or rectangular threaded nut loosely housed within a flexible, Hardened Spring Steel cage. This cage features compressible wings that allow the entire unit to snap securely into pre-punched square holes on panels or racks. The ingenious loose housing allows the nut to "float" slightly, compensating for minor alignment tolerances during assembly. This unique floating design provides self-retaining capabilities, making cage nuts the industry standard for rapid, vibration-resistant mounting in tight or enclosed spaces where access to the back of the panel is restricted.
Cage nuts must provide both structural strength and spring tension. The inner nuts are typically manufactured from durable Carbon Steel or Stainless Steel (including marine-grade 316 and standard 304 grades). The cage itself is constructed from hardened spring steel to maintain its tension and snap-in reliability.
To protect against corrosion and ensure longevity, cage nuts are available with multiple surface finishes, including:
Cage nuts are rated for robust mechanical properties, particularly regarding their tensile strength and self-retaining floating design. They adhere to stringent international manufacturing standards, including:
They are widely available in standard sizes tailored for rack mounting and panel assembly, most notably M4, M5, M6, M8, and M10. The threading options cover a broad spectrum of industrial needs, including Metric Coarse, Metric Fine, Unified National Coarse (UNC), and Unified National Fine (UNF).
The snap-in, captive nature of cage nuts makes them indispensable across several key sectors:
By combining the strength of a heavy-duty threaded nut with the flexibility and ease-of-installation of a spring steel clip, cage nuts offer a highly efficient blind fastening solution. Their ability to float and compensate for misalignment ensures swift assembly and enduring stability in panel and rack-mounting applications worldwide.
Our cage nuts are available in a range of sizes, materials, and standards. Contact us for a detailed specifications sheet and competitive bulk pricing.
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