Premium Cage Nuts: The Standard for Server Racks and Data Cabinets
At Handan Bolt, we specialize in the manufacturing of high-precision Cage Nuts (also known as Captive Nuts or Clip Nuts). These fasteners are the industry standard for mounting equipment into square-holed 19-inch server racks and data cabinets. Located in Yongnian, the fastener hub of China, we supply millions of these essential components to rack manufacturers, system integrators, and distributors worldwide.
What is a Cage Nut?
A Cage Nut (Read more on Wikipedia) consists of a square nut (usually made of carbon steel) loosely held in a spring steel cage. The cage has two wings that can be compressed to clip into the square holes of equipment racks. This design allows the nut to “float” slightly within the cage, providing tolerance for slight misalignments during screw installation.
Technical Specifications and Materials
Quality is critical for cage nuts, as a failed nut can mean removing heavy server equipment to fix. Our cage nuts are engineered for durability and ease of installation.
1. Material Composition
- Cage Material: High-quality Spring Steel (65Mn) or Stainless Steel (304). The spring steel ensures the wings retain their elasticity even after repeated insertions and removals.
- Nut Material: Low Carbon Steel (C1010/C1022) or Stainless Steel. The nut is threaded to precise ISO standards to ensure smooth engagement with mounting screws.
2. Surface Treatment (Finish)
- Blue/White Zinc Plated (Cr3+): The most common finish, offering good corrosion resistance and a clean, metallic look.
- Yellow Zinc Plated: Offers enhanced corrosion resistance (often preferred in automotive or industrial settings).
- Black Oxide / Black Zinc: Designed specifically for black server cabinets and audiovisual racks to remain inconspicuous.
3. Size Range
We manufacture cage nuts in all standard metric and imperial sizes:
- M6 (Most Popular): The global standard for networking and server racks.
- M5: Often used in lighter telecommunications equipment.
- M8 / M10 / M12: Heavy-duty sizes for industrial electrical cabinets and heavy machinery mounting.
- Imperial Sizes: 10-32, 12-24 threads available for the US market.
Key Benefits of Our Design
- Tool-Free Installation: Our cage wings are designed with the perfect tension—tight enough to hold securely, but flexible enough to be installed by hand (or with a simple cage nut tool) without injuring fingers.
- High Torque Resistance: The square nut sits flush against the cage walls, preventing it from spinning when the screw is tightened.
- Universal Fit: Compatible with all standard square-hole racks (Dell, HP, IBM, etc.) with wall thicknesses ranging from 1.5mm to 3.0mm.
Applications
Our cage nuts are widely used in:
- Data Centers: Mounting servers, switches, patch panels, and PDUs.
- Audio/Video Production: Securing amplifiers and mixers in flight cases.
- Electrical Enclosures: Fastening components in control panels.
- Automotive: Used in vehicle body panels where access to the rear is limited.
Why Source from Handan Bolt?
Factory Direct Savings: Buying directly from the manufacturer eliminates trading company markups.
Complete Sets Available: We can package cage nuts together with matching screws (e.g., M6x16mm Pan Head Screws) and plastic washers in kits of 50 or 100 for retail sale.
Strict Quality Control: Every batch is tested for thread accuracy (Go/No-Go gauge) and spring elasticity.
Get a Quick Quote Today
Whether you need a bulk shipment of 100,000 pcs for a production run or retail-ready packs, Handan Bolt is your reliable partner.
Ready to place an order or request samples?
Please click here to Contact Our Sales Team for a Free Quote. We offer competitive export pricing and fast shipping globally.
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