High-quality Aluminum Washer Supplier

Aluminum washers are flat metal rings with a hole in the middle, usually used to disperse the load pressure of screws or nuts to prevent material damage or loosening. Due to their light weight, corrosion resistance and good conductivity, aluminum washers are widely used in many industries such as aviation, automobiles, electronics, and electrical, and are an ideal choice to replace traditional steel washers. Contact us

Introduction to Chalco aluminum washers

Material: Common grades include 1060, 1100, 3003, 5052, 6061 and 2024

Temper: O, H14, H18, T6, etc.

Hardness: Depending on alloy and temper, Brinell hardness generally ranges from 20 to 95

Surface treatment: Mill finish, anodizing, black oxidation, spraying, zinc plating, etc.

Thickness range: 0.5 mm – 5 mm (customizable)

Outer diameter range: 6 mm – 100 mm

Inner diameter range: 3 mm – 50 mm

Dimensional tolerance: Typically ±0.1 mm; tighter tolerances can be provided upon request

Types of Chalco aluminum washers

Aluminum flat washer

Function: Increases contact area, distributes pressure, and protects surfaces from damage.

Application: Widely used in basic connection scenarios across machinery, electrical equipment, construction.

Spring washer

Function: Provides preload and prevents loosening from vibration or heat.

Application: Suitable for vibrating or dynamic load environments like engines and machinery.

Countersunk washer

Function:Ensures a flush finish after installation, improving appearance and connection reliability.

Application: Used in high-aesthetic products like electronics, decorative parts, and precision instruments.

Sealing washer

Function: Provides airtight or watertight sealing to prevent leakage of liquids or gases.

Application: Commonly used in pipe fittings, hydraulic systems, fuel systems, and similar applications.

Toothed lock washer

Function: Prevents fasteners from loosening due to vibration by providing anti-rotation capability.

Application: Used in high-frequency vibration or high-torque environments.

Shouldered washer

Function: Provides axial guidance and positioning for screws while distributing the applied force.

Application: Suitable for precision components, such as electric tools and tightly fitting parts.

Wave washer

Function: Provides continuous small elastic force, absorbs vibration, and compensates for axial gaps.

Application: Used in bearing preloading and lightweight mechanical components.

Custom-shaped washer

Function: Meets the needs for special structural installations, position restrictions, guidance, and other purposes.

Application: Widely used in electronic devices, specialized machinery, and industrial design components.

Chalco can customize the shape according to drawings or special purposes, such as square hole, with card slot, etc. Contact us for customization.Quick Quote

Features of Chalco aluminum washers

As one of the leading aluminum processing material manufacturers in China, Chalco's aluminum washer products have earned the trust of a wide range of industrial clients due to their excellent raw materials, stringent manufacturing processes, and outstanding performance.

Pure materials and complete alloy range

Chalco offers a variety of high-quality aluminum and aluminum alloy washers, including:

Pure aluminum series (1060, 1100): Good conductivity and high ductility, suitable for electrical and electronic industries.
Aluminum-manganese series (3003): Excellent corrosion resistance, commonly used in construction and outdoor equipment.
Aluminum-magnesium series (5052, 5754): High strength and good fatigue resistance, ideal for high-stress environments such as automotive and machinery.
Aluminum-silicon-magnesium series (6061, 6063): Balanced mechanical properties and machinability, widely used in general industries.

Advantages: All raw materials comply with international standards such as GB/T, ASTM, and EN, and are traceable.

Precision machining with strict dimensional tolerance control

Chalco possesses advanced stamping and CNC turning equipment, ensuring that each washer has precise control over its outer diameter, inner hole, and thickness.

Dimensional tolerance control range: ±0.05 mm to ±0.1 mm, with the ability to achieve higher levels of precision based on customer requirements.
Surface features: No burrs, no cracks, and smooth edges, suitable for precision assembly requirements.

Advantages: Providing customers with high consistency and high assembly efficiency components

Diverse surface treatments

To enhance the corrosion resistance, appearance, or electrical performance of aluminum washers, Chalco offers a variety of surface treatment services:

Anodizing (natural color, black, gold, etc.)
Sandblasting (to improve friction coefficient and decorative properties)
Electroplating or chemical oxidation (to enhance conductivity or insulation)
Fingerprint-resistant/coating treatment (for the electronic precision industry)

Advantages: Meets the special requirements of various industries in terms of appearance, corrosion resistance, electrical insulation, and more.

Flexible application, customizable

Chalco offers customization services for both standard and non-standard parts, with the ability to quickly respond to customer needs, including but not limited to:

Special sizes (e.g., small inner holes, large outer diameters, high thickness ratios)
Custom-shaped washers (square holes, oval, U-shaped, stepped, etc.)
Multi-hole, multi-functional composite structures (e.g., aluminum + rubber sealing rings, etc.)

Advantages: Significantly enhances customer design flexibility and shortens development cycles.

High strength and corrosion resistance

Aluminum alloy washers that have been heat-treated (e.g., T6) or cold-worked offer excellent strength-to-weight ratios.
The natural oxide film provides good corrosion resistance, allowing for use in humid or outdoor environments without additional rust protection.
Suitable for medium to high-strength connection requirements, while reducing overall assembly weight.

Advantages: Particularly well-suited for long-term service environments such as automotive, power equipment, communication base stations, and photovoltaic brackets.

Strict quality control and traceability system

Chalco implements rigorous quality control processes, including:

Raw material composition spectroscopic analysis
Precision dimensional inspection and surface defect checks
100% visual inspection before shipment
Material Test Certificate (MTC), ROHS, REACH, and other reports available

Advantages: Ensures comprehensive quality, safety, and compliance requirements for customers.

Global supply capacity and service system

Chalco has large-scale production lines and stable inventories, capable of handling bulk deliveries.
Comprehensive support for overseas clients, including export packaging, customs documentation, and customized labeling.
Fast prototyping and engineering technical support to assist customers in seamlessly transitioning from R&D to mass production.

Advantages: Provides long-term, stable supply for OEMs, engineering contractors, traders, and other clients.

Application fields

Aerospace: Used for weight reduction in structural connections
Automotive manufacturing: Used for fixing parts such as body panels and engine brackets
Electronics: Used as heat dissipation or insulating washers
Power equipment: Busbar fixing and conductive contact points
Building decoration: Aluminum profile curtain wall connectors
New energy industry: Solar panel brackets, battery module fasteners

Common size chart

ID(mm)	OD(mm)	Thickness(mm)	Type
3.2	8	1	Aluminum flat washer
5.3	10	1.2	Aluminum flat washer
6.4	12	1.5	Aluminum flat washer
8.4	16	2	Aluminum flat washer
10.5	20	2	Aluminum flat washer
12.5	24	2.5	Aluminum flat washer
16.5	30	3	Aluminum flat washer
20.5	36	3.5	Aluminum flat washer
24.5	40	4	Aluminum flat washer
32.5	50	5	Aluminum flat washer

FAQ

What are the advantages of aluminum washers compared to steel washers?

Aluminum washers are lighter, corrosion-resistant, and do not rust, making them ideal for applications with high weight and environmental requirements.

Are aluminum washers suitable for high-temperature environments?

Standard aluminum washers can be used below approximately 200°C. For higher temperature environments, high-temperature alloys or special treatments can be used.

Do aluminum washers rust?

Aluminum washers do not rust like steel. The surface of aluminum naturally forms an oxide film, providing excellent corrosion resistance.

Can anodized aluminum washers be provided?

Yes, anodized aluminum washers are available in common colors such as silver, black, and gold, enhancing both aesthetics and corrosion resistance.

Is it possible to customize non-standard sizes?

Yes, non-standard sizes can be customized based on customer drawings or samples, with stamping, CNC machining, and other services available.