Washers
Your Professional Washers Manufacturers
Handan DongChao Hardware Products Co., Ltd. is a leading fastener manufacturer and factory established in 2008, located in the fastener capital of China. With nearly two decades of experience in design, production, and global distribution, we specialize in producing self drilling screws, Tek screws, and self tapping screws. In addition, we supply a wide range of high-quality fasteners including bolts, nuts, washers, shear studs, threaded rods, anchor bolts, and rivets, serving diverse industries worldwide.
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Why Choose Us
Professional Team
The members of the team are highly skilled and proficient in their respective roles and possess the necessary education, training, and experience to excel in their jobs.
Quality & Certification
Handan DongChao adheres to strict international quality standards, holding ISO and CCC certificates. Every product is engineered for durability, strength, and reliability to meet the needs of demanding applications.
Customized Services
We understand that each customer has unique manufacturing needs. That’s why we offer customization options to cater to your specific requirements.
Global Market
Our fasteners are widely exported to USA, UK, UAE, Saudi Arabia, Vietnam, Korea, Africa, South America, and many other regions, earning trust and recognition from customers worldwide.
Benefits of Washers
Distributing Load
Washers help spread the pressure exerted by the tightened nut over a larger area. This prevents the surface from being damaged or dented.
Preventing Loosening
Washers create a tighter fit between the nut and the surface, reducing the risk of connection loosening due to vibrations or movement.
Protecting Surfaces
Washers act as a barrier between the nut and the surface, preventing scratches or marring of delicate finishes. For example, a washer prevents the nut from scraping or chipping the paint when attaching a decorative bracket to a painted wall.
Enhance Space
Washers help to ensure that the bolts and screws fit snugly. By threading the fastener through the washer before installation, you ensure that the fastener doesn’t go too deeply into the surface material.
Vibration Reduction
Vibration isolation washers are manufactured using soft vibration-absorbent materials like rubber or plastic. They help to absorb vibration, reducing the amount of stress applied to the fastener and surrounding equipment.
Leak Protection
By creating an airtight, watertight seal, washers can prevent liquid from leaking around the drilled fastener holes in plumbing and process piping and connections.
Types of Washers
Flat Washers
Offer a bolt or screw a wider bearing surface that will disperse the load weight to a greater surface area and ensure that the nut or bolt is pressed up against a smooth surface, thus reducing the chances of the fastener loosening over time.
Cup Washers
Give the ability to add a finished look to a project where the material is too hard for the countersunk screw head to countersink itself, as well as prevent screw heads from pulling through a pilot hole that is larger than the head of the screw.
Fender Washers
Are similar in shape and performance to a flat washer, except the outside diameter is much larger in proportion to the center hole.
Split Lock Washers
Split and bent to create a spring-like effect. When fully compressed, they provide greater bolt tension per unit of applied torque, offering protection against the fastener loosening from vibration.
Tooth Lock Washer
Internal tooth lock washers work by sinking their teeth into the head of the fastener and the material that is being fastened into, creating a strong bond that keeps the screws and bolts in place.
Application of Washers
Automotive Industry
In the automotive industry, washers are used in a wide range of applications, from securing engine components to ensuring that electrical systems remain sealed. For example, flat washers and lock washers are commonly used to prevent bolts from loosening in engine compartments, while sealing washers prevent fluid leaks in automotive systems.
Construction Industry
In construction, washers are used in structural applications to ensure the stability of buildings, bridges, and other structures. Flat washers are used to spread the load of bolts on structural connections, while sealing washers are used to prevent leaks in waterproofing systems.
Electrical & Electronics Industry
Electrical and electronic systems rely heavily on sealing washers to prevent moisture ingress and protect sensitive components. Lock washers are also commonly used to maintain the stability of connections in high-vibration environments like generators or machinery.
Industrial Equipment & Machinery
Industrial machinery often requires lock washers to maintain tight connections and specialty washers to handle high temperatures or pressure. In machinery that runs constantly, such as conveyor belts or turbines, washers ensure that the fasteners remain intact, even under constant stress.
Size Chart
|
|
Inner Diameter (D1, Mm) |
Outer Diameter (D2, Mm) |
Thickness (S, Mm) |
|
M2 |
2.1 |
4.1 |
0.5 |
|
M4 |
4.3 |
7.6 |
1.0 |
|
M6 |
6.4 |
11.8 |
1.6 |
|
M8 |
8.4 |
14.8 |
2.0 |
|
M10 |
10.5 |
18.1 |
2.5 |
|
M12 |
12.5 |
21.1 |
3.0 |
|
M16 |
16.5 |
28.2 |
3.5 |
|
M20 |
20.5 |
34.5 |
4.0 |
Description
|
Product Name |
Washer |
|
Standard |
DIN125A, DIN9021, ASTM F844 SAE, USS,F436 |
|
Material |
Stainless steel :SS201, SS202,SS303, SS304, SS316,SS316L,SS904L,F593 |
|
Carbon steel:Q195,Q235,35K,45K,42Grmo,307A,307B,A325,A394,A490,A449 |
|
|
Finishing |
Plain, Black, zinc-plated, HDG, Nickel, Gr, Dacromet. Geomet |
|
Production |
Stamping |
|
Process |
Machining and CNC for Customized fastener |
|
Packing |
Bulk packing : 20kg per carton; 36 cartons per pallet small boxes or bags packing are available |
|
Certs |
Material Certs and inspection certs are available |
|
Samples |
Free Samples for standard fastener |
Lead Time
|
Quantity (kilograms) |
1 - 1000 |
1001 - 10000 |
10001 - 25000 |
> 25000 |
|
Lead time (days) |
7 |
15 |
30 |
To be negotiated |
Packaging and Shipping
FAQ
As one of the leading washers manufacturers and suppliers in China, we warmly welcome you to wholesale bulk washers in stock here and get pricelist from our factory. All customized products are with high quality and competitive price.
Carbon Steel And Stainless Steel Square Washer, DIN125 Flat Washer, DIN127 Spring Washer