M4-M8 Zinc Plated Cage Nuts | Server Rack Mounting Hardware

High-precision M4-M8 Cage Nuts designed for secure equipment mounting in standard 19-inch server racks and data center cabinets. Featuring a spring steel “cage” for easy positioning, these threaded inserts are available in Zinc-Plated Carbon Steel and Stainless Steel 304. They provide a reliable, replaceable threading solution for square-hole rack rails.
  • Sizes: Metric M4, M5, M6, M8
  • Material: Spring Steel (Cage) + Carbon Steel/SS304 (Nut)
  • Application: Server Racks, Network Cabinets, Telecom Equipment
  • Feature: Easy snap-in installation and high torque resistance.
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Premium M4-M10 Cage Nuts: The Standard for Server Rack Mounting

Our M4-M10 Cage Nuts, also known as Rack Nuts, are the essential fastening solution for IT infrastructure and telecommunications. Designed to snap into the square holes of 19-inch rack rails, these fasteners provide a threaded insert where equipment can be securely bolted. Whether you are setting up a small office network or a large-scale data center, our carbon steel cage nuts ensure a stable and professional installation.

We manufacture our server rack nuts using high-tension spring steel for the “cage” and precision-tapped steel for the nut itself, ensuring that every M6 or M8 cage nut withstands high torque without stripping or slipping.

Key Advantages of Our Mounting Cage Nuts

  • Tool-Free Installation: The flexible spring steel wings allow for quick snap-in installation by hand or with a simple insertion tool.
  • Replaceable & Versatile: Unlike pre-tapped holes, cage nuts can be easily replaced if threads are damaged, extending the life of your expensive rack rails.
  • High Torque Resistance: Engineered to provide superior pull-out strength, making them ideal for heavy server and UPS mounting.
  • Corrosion Protection: Available in Yellow Zinc, White Zinc, and Black Nickel finishes to match your cabinet aesthetics and environmental needs.

Technical Specifications: Cage Nut Dimensions

Choose the correct metric cage nut based on your rack’s hole size and equipment weight requirements.

Thread SizeCage Width (mm)Fits Hole (mm)Nut Thickness (mm)
M412.5 mm8.3 x 8.3 / 9.5 x 9.54.5 mm
M512.5 mm9.5 x 9.55.0 mm
M613.5 mm9.5 x 9.56.0 mm
M816.5 mm12.5 x 12.58.0 mm

Widely Used in IT & Telecom Infrastructure

Our M4-M8 Cage Nuts are the industry standard for:

  • Data Center Racks: Mounting servers, switches, and patch panels.
  • Telecom Cabinets: Securing outdoor networking equipment and power supplies.
  • AV Equipment Racks: Ideal for professional audio and video installations.
  • Electrical Enclosures: Providing threaded points in thin-walled metal boxes.

How to Install Cage Nuts Properly

  1. Select the correct M6 or M5 cage nut for your mounting screw.
  2. Hook one wing of the cage into the side of the square hole.
  3. Use a cage nut tool or compress the other wing to snap the nut into place.
  4. Ensure the nut is centered so the bolt can thread in straight.

Frequently Asked Questions

Q: Do you offer M6 Cage Nuts and Screws sets?
A: Yes, we provide complete mounting kits including M6 Cage Nuts, matching screws (Pan head or Truss head), and plastic washers.

Q: What finish is best for black server cabinets?
A: We recommend our Black Zinc or Black Nickel plated nuts for a seamless, professional look in black racks.

Direct Factory Supplier of M4-M8 Cage Nuts

Looking for bulk cage nuts at competitive wholesale prices? We support OEM customization and global shipping. Contact us now for a free quote and technical samples!

Inquiry Now

Cage Material

65Mn Spring Steel

Nut Material

Carbon Steel / SS304 / SS316

Surface Finish

Zinc Plated (White/Yellow/Black), Nickel Plated

Thread Size

M4, M5, M6, M8

Fits Hole Size

8.3mm x 8.3mm / 9.5mm x 9.5mm Square Holes

Panel Thickness

0.8mm – 3.2mm (Customizable)