Cage Nuts

Custom Cage Nuts Manufacturer


Cage Nuts Manufacturers

We are a custom cage nuts supplier, custom screws, bolts, and fastener manufacturer, our company has professional production and management talents, a long-term focus on the development, production, and solution of custom cage nuts to meet the individual needs of different customers.

We aim to provide our customers with worry-free service and create win-win
the situation, all of this has gained Heatfastener high reputation among our customers

stainless steel cage nut

Cage Nut Specification

Cage Nut or caged nut also called a captive or clip nut consists of a(usually square nut in a spring steel cage that wraps or around the nut

The cage has two wings that when compressed allow the cage to be inserted into the square holes, for example, in the mounting rails of equipment racks, when the wings are released, they hold the nut in position behind the hole

cage nut
cage nut

Advantages of cage nut

It permits a range of choice of nut and bolts size in the field, long after the equipment has been manufactured. Second, if a screw is over-tightened, the nut can be replaced, unlike a pre-threaded hole, where a hole with stripped threads becomes unusable third, Cage nuts are easy to use on materials too thin or soft to be threaded

  • Easy installation, no special tools required
  • Ideal for blind location assembly
  • Excellent “pullout” resistance
  • Won’t turn when the bolt is tightened
  • Attaches components to panels with square holes
  • Serviceable – parts disassemble easily
  • Snaps into bolt receiving position at center panel
  • Vibration and rattle proof
  • Extra high torque & holding power

Cage Nuts or Captive Nuts are self-retaining fasteners that are ideal for rack & equipment mounting applications. They are the perfect combination of a spring steel fastener and a high-strength multi-threaded nut. Easy to install, Captive Nuts snap into bolt-receiving position at panel edges or centered-panel locations.

Applications for Cage Nut:

  • Server racks
  • Grill panels
  • Blind assemblies
  • Cabinet construction
  • Automotive
  • HVAC
  • Electrical equipment
cage nut

Use case 1: Cage nuts that are used for installing rails and shelves are installed from the back of the square hole, with the spring clips facing towards you. The cage nut might have a bit of slack but that will go away once an appliance is screwed in. 

Use case 2: A cage nut that is used for attaching a thumb screw gets inserted from the front, with spring clips facing away from you. Thumb screws are used to secure servers onto a rack. 

cage nut

Type of Cage Nuts

They are many types of cage nuts in sizes and materials. the normal is 10-32, 12-24, and M6. Each of these works with accordingly sized screws. Cage nuts are built to latch into the square holes of a server, creating the ability for threaded screws to be inserted.


  • stainless steel
    • brass, copper
  • galvanized steel


  • M2,M4,M8,M6,M10,M12
  • Need Custom Cage Nuts for Your Industry?

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    Frequently Asked Questions

    Cage nuts are great for protecting your equipment from stripped threads and allow for convenient mounting of your server rack equipment. A cage nut houses a standard nut in a cage with a spring. The cage has two wings that can be pinched together to allow the cage nut to be inserted into a square hole

    The cage nut is also known as a square hole cage nut, thanks to the square shape of the nut, the square nut also has an internal features high strength screw fastening effect and requires a special tool or insertion into a pre pieced square hole for assembly, the nut can be secured to the metal or other material plate simply by pulling back the tool, making it easy to install or remove

    If you want to buy cage nuts, you can contact Heatfastner which is a professional cage nuts manufacturer and suppliers, factory, wholesale. specializing in custom nuts, screws, bolts. any materials and sizes are available