Product Description
Stainless steel square washers are a commonly used fastener accessory. Made from stainless steel, they feature a flat, square profile with a central circular hole designed to fit bolts. These washers have a uniform shape and precise dimensions, and are primarily used in conjunction with bolts and nuts to enhance the stability and durability of the connection.
Square washers are designed to absorb and distribute forces, preventing them from acting directly on components. During mechanical assembly, square washers are commonly used as spacers to reduce the contact area and friction between components. Using square washers can effectively minimize component wear and extend service life. They are suitable for applications in construction, mechanical equipment, power engineering, timber connections, and outdoor facilities.
If you are looking for a supplier of high-quality square stainless steel washers, Jihao Fasteners is your best choice. Please click the button below to view detailed product specifications and pricing.
Get Detailed Product Specifications
Product Specifications
|
Product Name |
Stainless Steel Square Washers, Square Flat Washers, Square Flat Washers, DIN 436 Square Washers |
|
Standards |
DIN 436 (General Standard), GB / Customized to Non-Standard Specifications |
|
Common Materials |
304 Stainless Steel (A2-70): General-purpose, rust- and corrosion-resistant 316 Stainless Steel (A4-70): Seawater- and chloride-resistant, marine/chemical grade |
|
Surface Finishes |
Natural, Pickled and Passivated, Polished |
|
Structure |
Square flat plate with a central round hole (for bolt fitting) |
Standard Size Chart (DIN 436, mm)
|
Specifications |
Inner Diameter d |
Side Length B |
Thickness t |
|
M3 |
3.2 |
10 |
1.0 |
|
M4 |
4.3 |
12 |
1.0 |
|
M5 |
5.3 |
14 |
1.2 |
|
M6 |
6.4 |
16 |
1.6 |
|
M8 |
8.4 |
20 |
2.0 |
|
M10 |
10.5 |
25 |
2.5 |
|
M12 |
13.0 |
30 |
3.0 |
|
M16 |
17.0 |
40 |
3.0 |
|
M20 |
21.0 |
50 |
4.0 |
|
M24 |
25.0 |
60 |
5.0 |
Our Factory
Applications
1. Construction and Steel Structure Engineering
Widely used in steel structure connections, bridges, and factory construction.
Increases the load-bearing area and prevents bolts from damaging the surface of the material.
Improves connection stability, with particularly noticeable results in wood structures or soft materials.
2. Wooden Structures and Furniture Manufacturing
Commonly used at joints between wooden beams and boards.
Prevents nuts from embedding into the wood, protecting the surface.
Provides more even load distribution, preventing cracking.
3. Mechanical Equipment Installation
Used for securing equipment bases or connecting components
Improves fastening reliability in vibrating environments
Can be used with spring washers for enhanced anti-loosening performance
4. Power and Telecommunications Engineering
Outdoor equipment such as power transmission towers and telecommunications base stations
Stainless steel offers excellent corrosion resistance
Suitable for harsh environments such as high humidity and salt spray
5. Pipe and Clamp Fastening
Used in pipe bracket and clamp installations
Provides a more stable clamping effect
Prevents deformation caused by localized stress
6. Marine and Offshore Engineering
High corrosion resistance, suitable for seawater environments
Used for deck equipment, structural connections, and other applications
FAQ
1. How do I choose the right washer size?
When selecting a washer, it must match the bolt specifications: the inner diameter should be slightly larger than the bolt diameter; the outer diameter should be chosen based on the installation space and the magnitude of the applied force; and the thickness should be selected according to pressure and clearance requirements. If you are unsure, please provide the bolt specifications, and we will match you with the appropriate washer free of charge.
2. How is the quality of the washers guaranteed?
Full-process quality control: raw material inspection, dimensional accuracy testing, hardness and elasticity testing, and salt spray testing. 100% final inspection before shipment.
3. What is the minimum order quantity for washers?
Standard washers: Minimum order quantity is generally 50kg–100kg; trial orders are negotiable.
Custom washers: Depending on the complexity of the specifications, typically 100kg minimum.
Large-volume orders qualify for wholesale pricing and priority production.
4. What is the production lead time?
In-stock standard parts: Shipment within 3–7 days
Custom washers: 10–20 days after receipt of prepayment
Rush orders can be arranged for expedited production
5. What payment methods are accepted?
T/T (Wire Transfer): 30% deposit, 70% paid in full before shipment
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