Cage Nut

Cage Nuts


How do I use cage nuts?


This video is about cage nuts and describes how to install and remove them, and how to identify if your product includes cage nuts.

You may have heard of cage nuts and wondered what they are and how they are used.  Today we are going to discuss cage nuts and show you some of their advantages and uses.

Cage nuts are used to mount IT equipment in server racks, such as the  Server racks compatible with cage nuts can be easily identified by the square holes the cage nuts use. Cage nuts are great for protecting your equipmUent 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 wings are then released to hold the cage nut in place.  Cage nuts come in many sizes but M5 and M6 cage nuts are mainly used in IT environments.  M6 is a heavier, more robust cage nut that M5.

Let’s take a look at mounting a Cage Nut on a rail in the

cage nut

In some situations, you may be advised to use a slot screwdriver to help install cage nut.  However, you will find it much easier to use a cage nut mounting tool.

To install a cage nut, use your tool to attach one of the wings from the cage nut.  Keep the pressure on the cage nut with your finger and then attach the other wing.  The cage nut is now ready for the mounting screw.

To uninstall a cage nut, use your tool to release the cage nut wing on one side and then the other side.

You can check to see if your product includes cage nuts by navigating to the website, searching for the product, and checking the Technical Specifications tab under the heading What’s in the Box.


cage nut or caged nut (also called a captive or clip nut) consists of a (usually square) nut in a spring steel cage which wraps 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 nuts conforming to this description were patented in 1952 and 1953.[1][2] This design requires insertion tools to install the cage nut into the hole. Newer designs featuring a squeeze-and-release tab allow for tool-less installation.

The square-hole cage nut can be used wherever a square hole can be punched. An older type of captive-nut uses a spring clip that holds the nut and slides on the edge of a thin sheet. While this type of cage nut can only position the nut a fixed distance from the edge of a thin plate, it works equally well with square and round holes. A patent for such a nut was granted in 1946.

Using cage nuts provides several benefits over threaded holes. It permits a range of choice of nut and bolts size (e.g. metric vs imperial) 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 nut are easy to use on materials too thin or soft to be threaded.

The nut is usually slightly loose in the cage to allow for minor adjustments in alignment. This reduces the likelihood that the threads will be stripped during equipment installation and removal. The dimensions of the spring steel clip determines thickness of the panel to which the nut may be clipped. In the case of square-hole cage nuts, the clip dimensions determine the range of hole sizes to which the clip will securely hold the nut. In the case of slide-on cage nut, the clip dimensions determine the distance from the panel edge to the hole.

A common use for cage nuts is to mount equipment in square-holed 19-inch racks (the most common type), with 0.375 inches (9.5 mm) square-hole size. There are four common sizes: UNF 10–32 and, to a lesser extent, UNC 12–24 are generally used in the United States; elsewhere, M5 (5 mm outside diameter and 0.8 mm pitch) for light and medium equipment and M6 for heavier equipment, such as servers.

Although some modern rack-mount equipment has bolt-free mounting compatible with square-hole racks, many rack-mount components are generally mounted with cage nut.

Different Types of Fasteners

Removing Cage Nut.

Device installation might require the removal or moving of the rear-pane cage nuts. If you need to move the cage nuts, follow this procedure to move them and then go to (below) ‘Installing Cage Nut’. to install them in the correct position.

  1.  Hold the cage nut in place and compress the  cage-nut clip with a flat screwdriver blade.
  2.  With the cage nut-clip compressed, push the cage  nut-clip out of the square hole.
  3.  Release the screwdriver pressure on the clip. The  cage nut is now loose and can be removed from the  square hole.

Installing Cage Nuts: The nuts go toward the inside of the . Make sure you install all the cage nuts at the same level on the mounting rails.

  1.  Hook one side of the cage-nut clip into the  rack-mounting-rail square hole.
  2.  Hold the cage nut in place and compress the  cage-nut clip with a flat screwdriver blade.
  3.  With the cage-nut clip compressed, push the cage-nut  clip into the square hole.
  4.  Release the screwdriver pressure on the clip. The  cage nut is now locked in the square hole.

Cage Nuts Manufacturers in India

Cage Nuts manufacturers in India. Leading suppliers dealers in Mumbai Chennai Bangalore Ludhiana Delhi Coimbatore Pune Rajkot Ahmedabad Kolkata Hyderabad Gujarat and many more places. Sachiya Steel International manufacturing and exporting high quality Cage Nuts Fasteners worldwide. We are India’s largest Cage Nuts Exporter, exporting to more than 85 countries. We are known as Cage Nuts Manufacturers and Exporters due to exporting and manufacturing on a large scale.

Cage Nuts Manufacturers Exporters Suppliers Dealers in Mumbai India

Cage Nuts Manufacturers in India: Cage Nuts Specifications –

We at Sachiya Steel International manufacture a wide variety of Nuts. There is a different types of Nuts used for different needs. Nuts are used with Bolts. Our Nuts are available in different sizes, grades and shapes. Sachiya Steel International manufactures and exports high-quality industrial Nuts. We are Exporters of the following Nuts –Hex Nuts, Heavy Hex Nuts, Lock Nuts, Nylock Nuts, Nylock Seld Locking Nuts, Flange Nuts, Rivet Nuts, Cage Nuts, Dome Nuts, Square Nuts and more. We are a well known and India’s leading Industrial Cage Nuts Exporters in Mumbai.

Cage Nuts sizes available
3/8″-16 Zinc Finish Grade 5 Finished Cage Nuts 1/2″-13 Zinc Finish Grade 5 Finished Cage Nuts 5/16″-18 Zinc Finish Grade 5 Finished Cage Nuts 3/4″-10 Zinc Finish Grade 5 Finished Cage Nuts
5/8″-11 Yellow Zinc Finish Grade 8 Finished Cage Nuts 1/4″-20 Zinc Finish Grade 5 Finished Cage Nuts 5/8″-11 Zinc Finish Grade 5 Finished Cage Nuts 3/8″-16 Yellow Zinc Finish Grade 8 Finished Cage Nuts
3/4″-10 Yellow Zinc Finish Grade 8 Finished Cage Nuts 1/2″-13 Yellow Zinc Fi nish Grade 8 Finished Cage Nuts 3/8″-16 Zinc Finish Grade A Finished Cage Nuts 1/4″-20 Zinc Finish Grade A Finished Cage Nuts
1/2″-13 Zinc Finish Grade A Finished Cage Nuts 1/4″-20 18-8 Stainless Steel Finished Cage Nuts 1/2″-13 18-8 Stainless Steel Finished Cage Nuts 1/4″-20 Yellow Zinc Finish Grade 8 Finished Cage Nuts
5/16″-18 Zinc Finish Grade A Finished Cage Nuts 5/16″-18 Yellow Zinc Finish Grade 8 Finished Cage Nuts 1″-8 Yellow Zinc Finish Grade 8 Finished Cage Nuts 5/8″-11 18-8 Stainless Steel Finished Cage Nuts
5/8″-11 Zinc Finish Grade A Finished Cage Nuts 1″-8 Zinc Finish Grade 5 Finished Cage Nuts 7/16″-14 Zinc Finish Grade 5 Finished Cage Nuts 7/16″-14 Yellow Zinc Finish Grade 8 Finished Cage Nuts
3/4″-10 Zinc Finish Grade A Finished Cage Nuts
Material Standards Grades
Nickel Alloy ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472 UNS 2200 (NICKEL 200) / UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8825 (INCONEL 825), UNS 6600 (INCONEL 600) / UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 8020 (ALLOY 20 / 20 CB 3)
Stainless Steel ASTM / ASME A/SA 193 / 194 B 8 (304), B 8C (SS 347), B 8M (SS 316), B 8 T (SS 321), A 2, A 4
Alloy Steel ASTM / ASME A/SA 193 / 194 GR B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M
Duplex Steel UNS NO. S 31803, S 32205
Nonmetallic Materials: Acrylic, Kel-F, Lexan, Polypropylene, Poly Vinyl Chloride, Teflon, Zytel 31, 101, 105
High-Temp Alloys Discaloy, 19-9 DL, 16-25-6, A286, Titanium, Nimonic 80, Mulitmet, Haynes 25, Greek Ascalloy, Unitemp 252, Udimet 500, Rene 41, Inco 700, Inco 901, Hastelloy X, 235, Waspaloy, RA 330
Copper Base Alloys Copper, Brasses: Yellow, Free-cut, Red, Naval, Bronze: Commercial, Phosphor, Silicon A & B, Aluminum, Silicon-Aluminum, Manganese, Ampco Alloys, Munitz Metal, Cupro-Nicles
Aluminum Alloys: 1100, 2011, 2014, 2017, 2024, 3003, 5052, 6053, 6061, 7075

Cage Nuts Manufacturers in India: About Cage Nuts Fasteners –

Cage Nuts are a type of fastener with a threaded hole. Cage Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. The two partners are kept together by a combination of their threads’ friction (with slight elastic deformation), a slight stretching of the bolt, and compression of the parts to be held together. Today Cage Nuts are used when a maximum amount of torque and grip is needed for a given size. Sachiya Steel International manufactures and exports high-quality Cage Nuts.

Cage Nuts Manufacturers in India: Industrial Cage Nuts –

  • Oil & Gas Industries
  • Nuclear Energy Sector
  • Petroleum Industries
  • Chemical Industry
  • Defence Industry
  • Aerospace Industry

We are leading Exporters of Cage Nuts in more than 85 Countries worldwide. We export to countries like Kuwait, Dubai, China, Bahrain, Oman, Saudi Arabia, Qatar, Iran, UAE, Brazil, Mexico and more.

Cage Nuts Exporters in Mumbai India

Cage Nuts Manufacturers in India: Cage Nuts Finishes –

  • Plain Finish Cage Nuts: Cage Nuts with No Coating.
  • Zinc Plated Cage Nuts: Cage Nuts Coated with Zinc.
  • Zinc and Chromate Cage Nuts: Silvery and offers resistant to corrosion for Cage Nuts.
  • Zinc and Yellow Chromate Cage Nuts: Offers better resistant to corrosion to Cage Nuts than Chromate.
  • Hot Dipped Galvanized(HDG) Cage Nuts: Offers superior resistant to corrosion due to the dipping of Cage Nuts in the molten zinc.

Client Project Report

Product supplied City
Cage Nuts in Oil Plant Rajkot, Gujarat
All types of Cage Nuts supply Ahmedabad, Gujarat
Stainless Steel Cage Nuts Nagpur, Maharashtra
Carbon Steel Cage Nuts New Delhi, Delhi NCR




Wing Bolt

A Bolt Having a Head Like a Wing Nut

wingnutwing nut or butterfly nut is a type of nut with two large metal “wings”, one on each side, so it can be easily tightened and loosened by hand without tools.

A similar fastener with a male thread is known as a  butterfly screw or a  Wing bolt.


  • Type A are cold forged or cold formed produced in regular, light and heavy dimensional series.
  • Type B are hot forged solid nuts available in three different wing styles.
  • Type C are die cast nuts available in three wing styles with variances between regular and heavy dimensional series
  • Type D are stamped sheet metal nuts available in three wing styles.
  • Download the India Fastener Mobile Application

d1 – the nominal diameter of the thread
P – thread pitch
l – length of bolt
d2 – head diameter
d3 – head diameter
e – bolt width
m – head height
h – head height including wings
a – length undercut
r1 – radius
r2 – radius
r3 – radius
g1 – width of the wing
g2 – width of the wing

Different Types of Fasteners

Table according to DIN 316:

dimensions in mm
Thread d1 M4 M5 M6 M8 M10 M12 M16 M20 M24
P 0,7 0,8 1 1,25 1,5 1,75 2 2,5 3
a max. 2,1 2,4 3 4 4,5 5,3 6 7,5 8
d2 max. 8 11 13 16 20 23 29 35 44
min. 6 8 10 13 17 20 26 32 41
d3 max. 7 9 11 12,5 16,5 19,5 23 29 37,5
min. 5,5 7,5 9 10,5 14,5 17,5 21 27 35
e max. 20 26 33 39 51 65 73 90 110
min. 18 24 30 36 48 62 70 86 106
g1 max. 1,9 2,3 2,3 2,8 4,4 4,9 6,4 6,9 9,4
min. 1,1 1,5 1,5 2 3,6 4,1 5,6 6,1 8,6
g2 max. 2,3 2,8 3,3 4,4 5,4 6,4 7,5 8 10,5
min. 1,7 2,3 2,7 3,6 4,6 5,6 6,5 7 9,5
h max. 10,5 13 17 20 25 33,5 37,5 46,5 56,5
min. 8,5 11 15 18 23 31 35 44 53,5
m max. 4,6 6,5 8 10 12 14 17 21 25
min. 3,2 4 5 6,5 8 10 13 16 20
r1 approx. 3 4 5 6 8 10 11 14 18
r2 approx. Radiused 1 1 1,2 1,6 2,5
r3 approx. 0,5 1 1 1 1,2 1,2 1,6 2 2,5
r4 approx. 2 2,5 3


Rivet Nut

Types Of Rivet Nut (INSERT NUT)





Download the India Fastener Mobile Application


Read moreRivet Nut

India Fastener

India Fastener is Number One In Business Aggregator for Fasteners & provides Std & Weight Count Solution.
IF has been started off with an initiative to link the ever growing field of technology with the world of fasteners. We have started off with an mobile solutions that facilitates you while handling your day to day weigh count issues. We already have the app for Android and iOS.
In all our efforts the core focus is innovation, and improving products for the end users. We strive extra mile to make sure you get the best and the solution helps you to focus on your core business.

Download the India Fastener Mobile Application

india fasteners app logo

this is india fasteners app logo

India Fasteners App Proved Various Solution In The Field Of Fasteners

Weight Count Solution In (Inch” & Metric {mm} )

Read moreIndia Fastener

Self Clinching Fasteners

Some of the advantages of self-clinching fasteners are:

Permanently installed in an assembly, self-clinching fasteners provide strong threads in metal sheets too thin to be tapped, and have enabled the development of many thin-metal designs that otherwise would not be possible.

As an example, design requirements for orthogonal chassis construction usually are satisfied by bent tabs and relief slots, brackets and hardware, or welding. However, each of these methods to produce right-angle assemblies has been known to exhibit performance or production drawbacks.

In enclosures where EMI is a concern, the “holes” created when bent tabs are used can impact negatively on desired shielding. Welding tabs is an extra production step, and plating and finish problems can occur. Where right-angle brackets are used for mounting, a variety of additional necessary hardware includes attaching screws, washers, lockwashers, and nuts, which tend to hamper assembly time and increase parts inventory.

Here are some of the typical reasons design engineers specify self-clinching fasteners (whether right- angle clinch or other types):

  1. Self-clinching fasteners are often the most practical and effective joining method for thin-metal assemblies (the fasteners are designed for permanent installation in metal sheets or panels as thin as 0.020 inch/0.51 mm).

  2. The fasteners are relatively small (even miniature types are available) and require less “real estate” for attachment, which meets smaller, lighter packaging requirements of today’s designs, especially those applications in the electronics industry.

  3. Once installed, self-clinching fasteners do not loosen and will not fall out, which ensures that delicate internal circuitry is protected from hardware damage.

  4. The fasteners eliminate the need to stock, use, or handle additional hardware (such as washers, lock washers, loose nuts, or bolts); accompanying thread-forming screws leave no metal residue.

  5. Self-clinching fasteners can accelerate end-product assembly, because hardware installation is usually performed during fabrication instead of during final production.

  6. Self-clinching fasteners allow for component disassembly for service or other reasons.

  7. In those cases where nuts and screws for completing final attachment cannot be reached after a component is assembled, self-clinching fasteners (specified for installation during the initial fabrication process) can simplify and expedite component mounting and assembly operations.

Download the India Fastener Mobile Application

Read moreSelf Clinching Fasteners

Brass Fasteners

Brass Fasteners are an extremely useful screw type that can be used across varying applications. The brass make-up of the screw offers a number of useful characteristics.

These include:

  • Anti-corrosive
  • Water resistant
  • Aesthetically pleasing



Typically, brass screws can be more aesthetically pleasing as the brass offers a softer tan colouring that works well with wood. Typically smaller brass screws are used when building furniture or installing doors etc.

Stripping can occur when using brass screws whilst working with wood, and often a drill hole often the same size of the screw is drilled into the material first. The use of these pilot holes that are the same diameter as the unthreaded part of the brass screw helps avoid stripping and ensures the screw offers maximum strength and load capacity.

Brass is a softer metal and so must be used with more care. It is also, as always, beneficial to use a screwdriver that fits the head of the screw exactly. Use better quality brass screws to help avoid any issues, such as the range Tradefix Direct sells.


The anti-corrosive and water resistant nature of these screws means they are ideal for exterior use.

Quite often iron screws with a brass plating are used, but brass screws work just as well. The main benefits of these screws will be found when installed in areas that cannot be easily maintained, and should be used instead of more typical iron screws which can rust.


For decades brass screws have been used on marine equipment, purely as these are the best screws for the job. The water resistant and anti-corrosive qualities of these screws are perfect for use around the sea and underwater (or anywhere where it is generally a bit damp!)

Regular steel and iron screws can corrode from prolonged exposure to the wind, sun and rain, and so pure brass or brass plated iron screws are the best for the job.

Different Types of Fasteners


Read moreBrass Fasteners

Mild Steel Fastener

Mild Steel Fastener

The reason is that Mild Steel Fastener [up to 0.3%carbon] is strong and tough.The thumb rule is that if more carbon included in the alloy, the steel becomes stronger and harder but the toughness is diminished, making it more brittle. The general run of the bolts needs to be cheap, strong enough for the job and exhibit a degree of flexibility, which mild steel does. Higher grades can have more tensile strength, and be stronger, but they lose elasticity and are more expensive like the stainless steel bolts.

The reason carbon steel is used is because of the following considerations:

Functional requirements – it meets all of the requirements for the intended use.

Material properties – it can be tailored to suit the application thru control of chemistry, heat treatment(s), forming, etc.

Manufacturing process – it has a cheap, easy manufacturing process

Fabricability – like above, it sis easy to form into the desired shape with the required mechanical properties.

Availability – it is the most commonly used material for construction used. widely available.

Thermal stability – with the proper heat treatment and chemistry, it is very stable within limits,, normally matching what it is bolting together in the first place.

Cost – it is cheap to make.

All of the above considerations can be applied to other materials as well. However, carbon steel is the most commonly used material and cheapest compared to other material. Stainless Steel and Nickel alloy bolting does exist for applications that carbon steel is not suitable for (i.e. corrosive or elevated temperatures).

Read moreMild Steel Fastener

High Tensile Fasteners

What Is High Tensile Bolts (H T BOLTS)?
1. what’s High Tensile Bolts? Understanding H T Bolts/Fasteners Grades.
2. Engineers, construction, automobile, manufacturing and plenty of services industry professionals know the answer to this and much of other technical questions on fasteners and fixings. But tons folks have questions, what are these numbers on some fasteners and fixings we encounter in our garage, some furniture and other household stuff. Before we answer what’s H T bolts, here are a couple of belongings you got to realize fastener and fixings or bolts. attend following slides and find out…
3. Commonly, most folks know fasteners as bolts, screws or studs. So what’s the difference between a bolt, screw and stud?
4. what’s a Nut & Bolt? The threaded rod that you simply see during this picture may be a bolt Alongside may be a nut and it’s often mated with a bolt.
5. what’s a Screw? A screw is slightly different than a bolt. Screws are externally threaded fasteners. Screws have the power of forming it’s own thread when inserted into the holes inside assembled parts.
6. what’s a Stud? Stud is different from both bolt and screw in appearance and uses. It doesn’t have head at one end sort of a normal fastener. Studs are metal rods otherwise you could say shafts with threads on each side or both ends.
7. So what are those numbers that we see in most of the fasteners?
8. These numbers on fasteners and fixings represent the last word lastingness of a bolt. In Australia, there are 3 different grades of bolts in common use. Commercial Grade Structural Grade High Tensile
9. Commercial Grade: this is often rock bottom grade with a lastingness of 4.6 or 400 MPa. Structural Grade: Structural grade comes next with a lastingness of around 800 MPa or 8.8. High Tensile High tensile bolts are the very best grade with an ultimate lastingness of 1200 MPa or 12.9
10. Presentation of THE WDS GROUP. Australia’s one stop specialized fastener and fixings specialist.

Read moreHigh Tensile Fasteners

Stainless Steel Fasteners

Stainless Steel Fasteners and their Benefits

S S  Fasteners are, most importantly, corrosion resistant. They have an excellent life cycle, are environmentally friendly and are 100% Recyclable. They are also resistant to high heat as well as extremely cold temperatures making stainless steel fasteners the material of choice for almost any application!

When you are moving past the design phase and into the building phase of your project, you need to make sure you have quality materials to help you get the job done right.

When it comes to putting a project together you want to make sure it holds up. We can help! With our stainless steel fasteners you won’t ever have to worry about a project falling apart. We use stainless steel because it is a quality product that will allow you to build whatever you need.

Some of our stainless steel fasteners include your basic screws, nuts, pins, washers, and anchors. However, we also have rivets that can be used for blind fastening solutions, hose clamps that can give you non-leak connections, and thread forming screws that can help you fix malleable materials. Whatever you need to do we have a quality fastener to fit your needs.

Read moreStainless Steel Fasteners