Nut

Haodeli: Leading Nut Manufacturer in China!

Shenzhen Haodeli Furniture Fittings Co., Ltd. (referred to as "Haodeli Hardware Fittings Factory") is a manufacturer specializing in the production and sales of furniture hardware accessories and furniture plastic accessories manufacturers. The main products are: inner and outer tooth nuts, three-in-one connectors, casters universal wheels and so on.

Wide Product Range

We can export various custom fasteners with a wide variety of plating, which includes different colors of Zinc, Black Oxide, Black Anodizing, Tin, Silver, Waxing, Passivation, Nickel, Antique Brass, Chrome, Cadmium, GM Spec, Magni Coating, Chrysler spec, and so on.

Quality Raw Materials

We supply both inch and metric fasteners. Our fastener line includes a wide range of materials such as steel, stainless steel, brass, silicon bronze, Hastelloy, Inconel, Monel, aluminum, alloy 20, 17-4PH, 17-7PH, titanium, and other non-ferrous metals.

Quality Guaranteed

From quality testing of raw materials to the careful management of manufacturing processes and the comprehensive testing of finished products, we can deliver customer orders that live up to and exceed expectations.

Advanced Equipment

With state-of-the-art Japanese technology power coating lines and professional fabrication machines such as automatic welding and tube laser cutting machines, customers can be assured that every product will be fabricated with precision and care.

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Introduction of Nut

Nuts are female fasteners with a threaded hole and are used to secure a stud or bolt. They are generally hex-shaped and are loosened and tightened with a wrench, while others are knurled. The knurled variety does not require tools to make adjustments. We stock a variety of machine screw hex nuts, potentiometer and control hex nuts, hex flange nuts, heavy hex nuts, and thumb nuts.

Custom Nuts Specifications

Materials (Metals)

Alloy Steels
Aluminum
Beryllium
Brass
Silicone Bronze
Carbon Steel
Magnesium
Molybdenum
Monel
Inconel
Nickel
Stainless Steel
Tin
Titanium

Hardening Specification

We can manufacture many custom fasteners to your specification:
Dowels & Pins
Hose Couplings
Nails
Rivets
Screws
Shackles
Shaft Couplings
Studs

Materials (Plastic Polymers)

Various Plastics
Nylon

Standard

British
English
Metric

Bolt Types

We can manufacture many custom bolts to your specification:
Anchor
Bent
Eye
Hook
J
U
Carriage
Countersunk
Elevator
Lag
T-Handle
T-Slot
Flange
Carriage
Bent
Plow

Bolt & Screw Head Types

We can manufacture many custom head types to your specification:
Binding
Button
Fillister
Flat
Flat Undercut
Headless
Hexagon
Indented Hexagon
One-Way
Oval
Pan
Pentagon
Phillips
Round
Shoulder
Square Shoulder
Socket
Trimmed Hex
Truss
12-Point

Thread Types

We can manufacture many custom thread types to your specification:
ACME
Drywall
Machine
Self-Tapping
Self-Drilling Drive Screws
Self-Drilling
Type 17
Type 23
Type 25
Type A
Type AB
Type B
Type F
Wood
UNC
UNF

Bolt & Screw Drive Types

We can manufacture many custom drive types to your specification:
Combination
Hex/Hexagonal
Phillips
Six Lobe
Slotted
Socket
Square
Tamper Resistant
Torx

Nut Types

We can manufacture many custom nut types to your specification:
2-Way
Anchor
Cap
Castle
Conical
Coupling
Finished Hex
Flex Lock
Heavy Hex
Hex Flange
Hex Jam
Keps
Nylon Insert
Nylon Patch
Nylon Pellet
Semi-Finished Hex
Serrated Hex Flange
Slotted Hex
Square
Thumb
Top Lock
Wing

Finish

Automotive
Black Oxide
Brass Plated
Cadmium
Chromate
Chrome
Color Coated
Galvanized
Nickel Plated
Painted
Phosphate
Polished
PTFE
Silver Plated
Teflon
Zinc Plated

Industry Standards

ANSI - American National Standards Institute
ANSI B 18.2.4 2M
ANSI B 28.2.4 1M
DIN
DIN 934
DIN 970
ISO - International Organization for Standardization
ISO 4032
ISO 4033
UTS - Unified Thread Standard
UNC
UNF
UNEF
UNS
NPT
NPTF

How Do You Cooperate With Us?

Provide CAD Files Or 3D Files or Samples
Only through the above information you provided we can know the size, precision, and key features of the product to be controlled, which is the basis for us to accurately evaluate the price of the product.

Get a Quote
Tell us the quantity of products you need, and we will provide you with corresponding ladder prices according to different quantity requirements.

Specify Process, Material, Surface Treatment

If your requirements are consistent with the drawings you provide, it is not necessary to specify.

Order Your Parts

Send your order to us, we will reply to your specific delivery date.

Receiving Your Parts

After the order is completed, we will notify you in time and cooperate with you in logistics operations.

Advantages of Nuts

Nuts are incredibly simple to use. All you need is a wrench or socket set to attach them to the desired material. Once they’re secured, they provide a strong connection that can withstand high levels of tension without breaking or coming loose. Another advantage is that their small size makes them ideal for tight spaces where larger fastening tools may not fit. Additionally, they can be used with a variety of materials, including metal, plastic, wood, and more.
● Nuts are strong and durable.
● Nuts are easy to install.
● Nuts are corrosion-resistant.
● Nuts are reusable.
● Nuts are widely available.

What are the Different Types of Nuts?

The vast majority of nuts, no matter what type, are hex shaped. This is because the six sides make it easy to turn. It only takes a one-sixth turn for the nut to reach the next flat parallel. A nut with fewer sides takes more time to install. Other shapes are available, which are for specific needs.

Dome
Protects bolt threads underneath while presenting a clean appearance. Also can prevent skin and clothes from snagging on sharp edges.

Acorn
A type of cap nut with the same capabilities. Named after its head, which is shaped like an acorn. Cap nuts are used across all industries and also resist vibration.

Wing
The side wings enable quick, easy tightening and removal by hand. For this reason, it should not be used if vibration is present.

Jam
Low-profile nuts that, when jammed into place against a standard nut, prevents loosening. Also used when a standard nut won’t fit.

Flange
The flange serves the purpose of a washer, evenly distributing the load. Typically used in the automotive sector on exhausts.

Coupling
While not typically a bolt nut, these are used for connecting threaded rods or pipes together.

Nyloc
Insert creates friction, resulting in a gripping action and reducing chance of loosening due to vibration. Commonly used in white goods, computers and vehicles.

Square
A type of blind nut, its shape means that more of its surface is in contact with the material being, which reduces the chances of it loosening. Typically used with square-headed bolts.

Hex
Different types of hex nuts all provide a reliable hold. Easy to tighten and loosen due to its shape. Used in applications across all industries, from automotive to machinery.

Tee
For fastening soft materials such as wood or plastic. The flange on one side has hooks, which latch onto the material being fastened to strengthen the joint and leave a flush surface.

Slotted
Secured using a cotter pin or wire to prevent rotation. Typically used in applications where vibration is a constant threat.

Castle
The turret geometry on the castle nut differentiates this from the slotted nut. Their functions and how they work are the same

Keps-K Lock Nuts
Designed for easy assembly. The attached free-spinning serrated washer creates tension against the material’s surface when installed onto a bolt. Note: overtightening will cause the nut to fail.

Prevailing Torque Nut
The distortion of the top threads creates locking action, which causes the nut to resist loosening due to shock and vibration. They are installed with the conical top up, which makes these one-way lock nuts.

Kwik
Plastic push-on nut is applied to a threaded bolt and tightened manually or with a spanner or other tool. It can only be loosened with a wrench. Used when quick assembly is a priority.

Common Materials Used for Nuts

Nuts are commonly made of metal, but other options are available.
Aluminum nuts are light, resistant to oxidation, thermal and electrical conducive, and easy to manufacture.
Brass nuts are strong, conductive, corrosion resistant, with low magnetic permeability.
Copper alloy nuts have good load capacity, wear resistance, and are suitable for dynamic loads.
Fiber-reinforced plastic nuts use industrial fabric reinforced urethanes. They are wear resistant.
Inconel/Incoloy metal nuts provide good strength and oxidation/carbonization resistance in high temperatures. They can be used in temperatures up to 1200° F.
Nylon nuts are made of a tough and resistant material. It has good pressure ratings.
Plastic nuts are inexpensive and corrosion resistant for light loads.
Polytetrafluoroethylene (PTFE) is an insoluble compound and PTFE nuts have durability and low friction.
Polyvinyl chloride (PVC) is inert and resistant to chemicals, and PVC nuts are flexible, smooth, and non-toxic.
Polyvinylidene fluoride (PVDF) nuts has less creep and better strength than other fluoropolymers, but is susceptible at high temperatures.
Rubber nuts are used in specialty applications requiring vibration and noise dampening.
Steel nuts are produced of strong, carbonated iron. Uncoated steel is vulnerable to corrosion.
Hardened steel relies on hardening methods to produce a stronger, but more brittle, version of steel.
Stainless steel nuts are chemical and corrosion resistant with an appealing finish. They cannot be hardened like carbon steel.
Titanium nuts are hard and strong, light, and corrosion resistant. When alloyed with other metals, it increases strength and durability.

Steps for Fastening Nuts and Bolts

Step 1
The first thing to do is select the type and the size of the bolts, nuts, and washers that are appropriate for the example project. Determining factors include the type of material used for the example project, the type of fastening/connection that is needed, how strong the bolt needs to be to secure the connection, how many nuts, bolts, and washers are needed, or any specific manufacturer requirements that may be necessary. These are just a few of things to consider when you do an actual project. If you aren’t sure about what type or size is correct, ask a qualified representative at a home improvement center for help.

Step 2
Select a bolt and a washer. Slide the washer onto the end of the bolt and push it as far as it will go until it reaches the head of the bolt.

Step 3
Using the example project of two wood pieces, place the two pieces side by side and align the drilled holes so the bolt can be inserted between the two to make a connection.

Step 4
Take the bolt with the washer in hand and push the threaded shaft through the hole in the first piece of wood and continue pushing on through the second hole. The one piece of wood will have the washer and bolt head protruding from its hole while the threaded end of the bolt will be protruding from the hole of the second piece of wood.

Step 5
Take another washer and place it on the threaded shaft protruding from the second piece of wood. Push the washer all the way up until it is flush with the wood material.

Step 6
Place the nut on the end of the threaded shaft. Be sure the washer is aligned properly with the threads on the bolt and then begin to twist it clockwise until it reaches the washer. Tighten the nut with your fingers to secure it.

Step 7
Complete the fastening process by using a wrench that fits the size of the nut. Place the wrench on the nut and tighten it firmly so there is no wiggle room between the nut and the washer.

Common Problem of Nut

Q: What is nut?

A: A nut is a type of fastener with a threaded hole. 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.
In applications where vibration or rotation may work a nut loose, various locking mechanisms may be employed: lock washers, jam nuts, eccentric double nuts, specialist adhesive thread-locking fluid such as Loctite, safety pins (split pins) or lockwire in conjunction with castellated nuts, nylon inserts (nyloc nut), or slightly oval-shaped threads.
Square nuts, as well as bolt heads, were the first shape made and used to be the most common largely because they were much easier to manufacture, especially by hand. While rare today due to the reasons stated below for the preference of hexagonal nuts, they are occasionally used in some situations when a maximum amount of torque and grip is needed for a given size: the greater length of each side allows a spanner to be applied with a larger surface area and more leverage at the nut.
The most common shape today is hexagonal, for similar reasons as the bolt head: six sides give a good granularity of angles for a tool to approach from (good in tight spots), but more (and smaller) corners would be vulnerable to being rounded off. It takes only one sixth of a rotation to obtain the next side of the hexagon and grip is optimal. However, polygons with more than six sides do not give the requisite grip and polygons with fewer than six sides take more time to be given a complete rotation. Other specialized shapes exist for certain needs, such as wingnuts for finger adjustment and captive nuts (e.g. cage nuts) for inaccessible areas.

Q: What are nuts, bolts, and screws?

A: The names of nuts, bolts, and screws are often used interchangeably, so it can get quite confusing. They’re all versatile fasteners that securely join objects together, but these are their distinct differences.
Nuts are typically hexagonal, though they come in other shapes as well. They have an internal thread that screws onto a bolt to create tension and hold pieces together.
Bolts, on the other hand, have an external thread. It’s usually secured with a nut on the end or driven into a tapped hole. They’re designed to endure significant tension and shear forces, making them ideal for heavy-duty applications.
Screws, similar to bolts, are also threaded rods. The key difference is that screws are typically driven into an untapped hole. They create their own threads as they’re driven into materials like wood or plastic.

Q: What are the principal types of nuts?

A: Hex Nuts: Hex nuts are the most widely used nut. They feature a six-sided external surface and an internally threaded hole for use with matching bolts and other threaded hardware.
Coupling Nuts: Coupling nuts are extra-long nuts used to join externally threaded components. Two threaded parts such as threaded rods or hanger bolts are screwed into the opposing sides of the coupling nut, providing a strong and easily installed joint between parts.
Jam Nuts: Jam nuts are low-profile, half-height nuts used to prevent the loosening of bolted joints. Jam nuts are installed on a bolt or threaded rod before a full-size nut. They are usually tightened to between 25% and 50% of the joint's desired torque. Then, the full-size nut is installed to the joint's final torque. For many modern applications, lock nuts are preferred to jam nuts.
Lock Nuts: Lock nuts, also known as self-locking nuts, prevailing torque nuts, or nyloc nuts, are similar to standard hex nuts with the addition of a nylon or metal insert. The insert deforms when the nut is installed, increasing the prevailing force required to install the nut and its ability to resist loosening. Self-locking nuts with nylon inserts can be reused many times, although standards in some industries mandate minimum prevailing torque requirements for re-used self-locking nuts, including the Federal Aviation Authority's Acceptable Methods, Techniques, and Practices (AC 43.13-1B).

Q: How do nuts and bolts work?

A: A typical bolt has two main components: a shaft and a head shaped to fit a tool like a wrench. Bolts have an externally threaded shaft. The shaft may be entirely threaded, or it may be divided into threaded and unthreaded portions. The unthreaded portion is often called the shank or the grip length. The most common bolt heads are hex-shaped. However, other variations exist for specialty applications.
A nut is a fastener with an internal thread and an external surface shaped to fit a tool. Like bolt heads, modern nuts are usually hex-shaped. Nuts are screwed onto bolts to form a bolted joint.
The purpose of a bolted joint is to prevent parts from moving relative to each other. Each bolt and nut component plays a role.
The bolt's shaft prevents the parts from moving laterally (sideways) relative to each other.
The bolt's head and the nut prevent parts from moving away from each other.
The clamping force generated by a correctly torqued nut and bolt joint prevents parts from moving radially (rotating relative to each other).
When installing a bolt with a nut, there are two main stages. In the first stage, the nut screws easily onto the bolt until the bolt head and the nut are in contact with the surface of the joined parts.
In the second stage, it becomes much harder to tighten the nut. That's because further tightening—or torquing—elongates the bolt. Like an elastic band, this elongation generates tension in the bolt called the preload force. The preload force creates a clamping force that acts on the joined parts, holding them together.
When installing a nut and bolt, it's essential to achieve the correct preload force. Or, to put it another way, you need to apply the proper amount of torque. Inadequate preload can cause parts to move relative to each other or the nut to unscrew from the bolt. Excessive preload can strip the bolt's threads, causing the joint to fail.

Q: What are the common hexagonal nuts?

A: Finished Hex Nuts: A finished hex nut is the most basic of nuts - the six-sided nut that almost everyone first pictures in their mind when they hear the word “nut” in an industrial context. Hex is short for hexagon, referencing the six sides of the nut. These nuts feature internal threading and are commonly used with machine thread bolts and screws, in applications where no “locking” mechanism is required.
Hex Jam Nuts: Hex jam nuts are low profile - usually only about half as thick as a standard hex nut. Commonly used as a type of lock nut, the jam nut is "jammed" against a standard nut to lock the two in place. Jam nuts are also sometimes used in applications where a traditional, larger profile hex nut would not fit.
Machine Screw Nuts: Designed specifically to be used with machine screws, these hex nuts are much smaller sizes than full-size hex nuts and feature flat tops and chamfered corners. Threads can be coarse (UNC) or fine (UNF), and zinc plating is the most common type of finish applied to machine screw nuts.
Nylon Insert Lock Nuts: Nylon insert lock nuts are very similar to basic finished hex nuts, but feature a nylon insert lock to help secure the nut into place. When a nylon insert lock nut is installed onto a bolt or screw, the nylon insert wraps around the threads, protecting the connection from loosening due to vibration.

Q: What are advantages of square Nuts?

A: Protection from loosening: Square nuts are better protected from loosening than hexagonal nuts. Loosening involves a nut working its way off the bolt to which it’s attached. You can attach hexagonal and square nuts alike by twisting them onto the end of a bolt. Over time, however, some nuts may loosen. But square nuts cover more surface area of the objects with which they are used, so they are better protected from loosening.
Easier to keep track of: You’ll have an easier time keeping track of square nuts than hexagonal nuts. Nuts and other fasteners have a tendency to roll away when dropped. You may accidentally drop a bolt or nut, only to watch it roll away into the abyss where you’re unable to retrieve it. Hexagonal nuts are rounder than square nuts. This semi-round shape allows them to roll away when dropped. Square nuts aren’t round. If you accidentally drop a square nut, it will typically stay in place. This makes square nuts easier to keep track of.
Wrench tightening: You can tighten square nuts using a standard wrench. Hexagonal nuts support wrench tightening as well, but with six sides, you may struggle to grip them with a wrench. Square nuts have fewer but larger sides. As long as you have enough space, you should be able to easily place a wrench around two of these sides so that you tighten the square nut.
Available in a variety of styles: Square nuts are available in a variety of styles. They all feature a square shape consisting of four sides of equal length. With that said, some square nuts feature different characteristics than others. Some square nuts are made of stainless steel, whereas others are made of carbon steel. You can also find square nuts in different sizes, including metric and standard sizes.

Q: What are the most commonly Shaped Nuts used in construction and industrial applications?

A: Cap Nuts: Cap nuts are traditional hex nuts with the addition of a smooth dome on one side. These are used in assemblies where protection of the bolt or threaded is important after assembly, either for performance or for safety. Cap nuts can also be used for purely aesthetic reasons, such as in automotive uses or in residential construction, where the end of a bolt could cause an unsightly distraction for the user.
Acorn Nuts: Acorn nuts are a type of cap nut, where the domed side is pointed with a higher crown. This creates greater internal depth, allowing the bolt or rod to be threaded further into the nut.
Square Nuts: As opposed to the traditional hex (hexagonal) nut with its six sides, square nuts only have four sides and look exactly as they sound, a perfect square. Square nuts are typically used where there is an inset or channel in the receiving surface, such as in furniture, railroad applications, or other metal assemblies. The larger surface area of square nuts allows them to more easily resist loosening.
Wing Nuts: Wing nuts feature a head with two “wings” across from each other, making the nut able to be tightened and loosened by hand. Sometimes referred to as a “butterfly nut”, these are mostly used for the purpose of temporary fastening, but can also be found in bicycles and musical instruments.

Q: What is a locking nut?

A: Locking nuts or lock nuts are special types of fastener designed to achieve a secure fixing. Some suppliers call them self-locking nuts or stiffnuts. They are screwed onto a bolt or threaded rod just like standard nuts, but a lock nut will then resist loosening under torque or vibration forces.
Lock nuts or stiff nuts were invented in the 1930s to cut down on the cost of nut and washer use in various types of machine assemblies. Before this, the best way to prevent nuts loosening due to vibration was to use two standard nuts on a single bolt. However, this doubled the cost of nuts and washers for each bolt in the assembly.
Since individual nuts cost very little to make or buy, doubling up in this way is still a relatively cheap solution at low production volumes. However, it becomes exponentially more expensive at scale, and so the self-locking nut was conceived as a more economical way around the problem of unwanted loosening.
While locknuts themselves are individually more expensive than non-locking versions, they are still a cheaper solution than buying and using two standard nuts. Today, you will find locking nuts used on all manner of screwed rod and threaded studding assemblies across countless industries and applications.

Q: How to use locking nuts?

A: When it comes to the question of how to lock nuts on bolts, the answer varies slightly according to which exact type of locking nut you are using. However, for the most part, the initial threading and finger-tightening works just like it would with a standard hex nut. In many cases, you would then need to tighten the lock nut further with a wrench or similar tool, until you achieve the required grip. For some types, deciding which end of a lock nut goes on first is simple, as certain friction or torque-based designs dictate that a nut will only lock properly when fastened in one direction. However, you will need to pay attention to whether you are using a locknut with clockwise or anticlockwise threading. For other designs and brands of locking nuts, it may be necessary to use a lock nut washer alongside the nut itself to achieve the full lock.

Q: What are lock nut thread sizes?

A: Common lock nut thread sizes (usually given in metric or M measurements) include M3, M4, M5 lock nuts, M6, M8, M10, M12, M16, and M20. These will cover most standard domestic uses, although locking nuts ranging from M25 to M50, M60, and even M85 are also widely available online.

Q: What is the standard locking nut width?

A: A 10mm lock nut is a common width for many types of jobs and applications, although again, this is far from the only width available. Usually given in mm, standard sizes for locking nut widths include 5.5mm, 6mm, 7mm, 8mm, 11mm, 12mm, and 13mm.

Q: What are locking nuts made of?

A: For heavy-duty and industrial applications, all metal lock nuts such as stainless-steel lock nuts, mild steel, zinc, or brass locking nuts are preferred. However, part-nylon or all-plastic lock nuts are also popular in many applications, provided the torque forces they will need to withstand are not too severe.

Q: What is a wing nut?

A: Also known as a butterfly nut, a wing nut is a type of nut that’s characterized by the presence of two tabs. Most types of nuts feature a hexagonal shape. You can install and remove them by turning them. Wing nuts are distinguished from other types of nuts by their use of tabs. As shown in the adjacent photo, they have two tabs. These tabs or “wings” provide gripping surface so that you can easily install and remove them.

Q: How wing nuts work?

A: Wing nuts work like most other nuts: They are designed to hold two or more objects together when used in conjunction with a bolt. You can twist a wing nut onto the end of a bolt to prevent the connected objects from pulling away. Wing nuts feature internal threading, so they can run up and down the bolts with which they are used. The main benefit of wing nuts, however, is their ease of installation and removal. You can install and remove them more easily than other types of nuts thanks to their wings. Traditional nuts have a hexagonal shape, and with six sides, you may have trouble gripping them. Wing nuts offer a more ergonomic design by providing tabs. Rather than gripping the base of a wing nut, you can grip its two tabs.

Q: What are the different types of fasteners?

A: Fasteners are hardware devices used to mechanically join or secure two or more objects together. There are numerous types of fasteners, including screws, bolts, nuts, washers, rivets, pins, clips, and anchors, among others.

Q: What are the 3 types of mechanical fasteners?

A: The three primary types of mechanical fasteners are screws, bolts, and rivets. Each type has its own unique design and purpose. Screws are threaded fasteners that typically require a complementary nut or pre-tapped hole. Bolts are similar to screws but are usually larger and feature a separate nut to secure the joint. Rivets are permanent fasteners that are inserted through aligned holes and secured by deforming or "riveting" the end.

Q: What is the strongest type of fastener?

A: The strength of a fastener depends on various factors such as material, design, and application. However, in general, high-strength bolts, such as grade 8 bolts, are considered to be among the strongest fasteners. These bolts are made from alloy steel and have a high tensile strength.

Q: What form of fasteners is the most commonly used?

A: Screws are one of the most commonly used forms of fasteners. They are versatile, easy to use, and available in a wide range of sizes and designs. Screws are used in various applications, including woodworking, construction, electronics, and household projects.

Q: What are some types of permanent fasteners?

A: Some types of permanent fasteners include rivets, welding, and adhesive bonding. Rivets are cylindrical fasteners that are inserted through aligned holes and secured by deforming the other end. Welding involves melting and fusing two pieces of metal together to create a strong and permanent connection. Adhesive bonding refers to using adhesives or glues to bond surfaces together, creating a durable and permanent bond.

Q: What are fasteners?

A: A simple definition of a fastener is a temporary or permanent mechanical device that securely joins or attaches two or more surfaces to one another. Temporary fasteners are designed to be removed without damaging the two or more materials that are joined. Some temporary fastener examples include nuts and bolts, screws, and washers. On the other hand, permanent fasteners are designed to have a secure, long-lasting bond. Removing these types of fasteners could substantially damage the connected surfaces. Some permanent fastener examples include weld nuts and rivets.

We're well-known as one of the leading nut manufacturers and suppliers in China. Please rest assured to buy high quality nut made in China here from our factory. For more information, contact us now. M6 Threaded Inserts for Wood, Nuts and Bolts for Bed Frame, Castors