washers
Washers are used to distribute load, protect the surface of materials, enhance connection stability, and reduce the risk of loosening. They are widely applied in machinery, steel structures, automotive parts, solar mounting systems, electrical installations, and general industrial assembly.
product list
Fast Bite. Firm Hold. Zero Hassle.
DIN Series
IFI/ASME Series
Material & Surface Treatment
Commonly used and accept your customization.
Washer Selection Guide
1. Choose Based on Load Distribution Requirements
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For general fastening: Use flat washers (DIN 125 / ISO 7089) to distribute load and protect surfaces.
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For soft materials (aluminum, wood, plastic): Choose large OD/fender washers (DIN 9021) to prevent pull-through.
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For precision assemblies: Use machined washers to maintain exact tolerances.
2. Select the Proper Anti-Loosening Function
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Vibration environments (machinery, automotive, solar mounting):
Choose spring washers (DIN 127), split lock washers, or serrated lock washers (DIN 6798). -
High vibration or critical joints:
Combine washers with Nyloc nuts, prevailing torque nuts, or thread-locking adhesive. -
Not recommended: Split lock washers alone for heavy-duty structures — may lose preload.
3. Choose Material Based on Working Environment
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Indoor/dry environment: Carbon steel with zinc plating is sufficient.
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Outdoor environment: Use hot-dip galvanized or Dacromet-coated washers for long-term corrosion resistance.
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Marine / high-salt / chemical exposure: Choose 316 stainless steel for maximum durability.
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Electrical or insulation applications: Use nylon, PTFE, or fiber washers.
4. Select Washer Thickness and Hardness
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For high-strength bolts (8.8 / 10.9 / 12.9):
Use hardened washers (HV 200 / HV 300) to prevent compression damage. -
For normal bolts (4.8 / 5.8 / A2-70):
Standard washers are sufficient. -
For structural steel connections:
Follow DIN 6916 / EN 14399 large hardened washers.
Designed for Harsh Environments. Trusted Worldwide.
Reliable fastener manufacturer for solar, roofing, and industrial projects.
Your Trusted Fastening Solution!
Product advantages
What You care about, what we produce
Sharp Thread Form
Precise, uniform threads for smooth cutting action and strong fastening grip.Hardened Point
Enables efficient self-tapping into metals, plastics, and thin steel plates without pre-tapping.Standard Drive Types
Offered in Phillips, slotted, and hex drives for fast, stable, and labor-saving installation.
fastener series
- Self-tapping screw
- machine screw
- bolt
- nut
- solar hanger bolt
high quality stainless steel fastener
fastener series
You can find anything you want here.
The Benefits of Ordering Washer from Bilateral
quality assurance
Lorem ipsum dolor sit amet, consectetur adipiscing viverra ornare, eros dolor nulla.Price advantage
Factory direct, bulk purchases enjoy discountsLow MOQ
Standard products: small MOQ supported, mixed size orders accepted.
Custom products: MOQ depends on size and tooling requirements.delivery date
Standard products: Orders will be processed 15-30 days after placement Custom products: 45 days after placement，specific times will need to be discussed.
Common Questions
Frequently asked questions
What material are your washers made of？
We mainly use high-grade SUS304/SUS316, and can offer SUSU410 or other materials as required.
Can you customize types?
Absolutely. Custom designs and OEM specifications are available.
What is your MOQ?
Standard products: small MOQ supported, mixed size orders accepted.
Custom products: MOQ depends on size and tooling requirements.
Do you provide samples?
Yes. Samples are available for testing. Standard samples are usually free, only freight cost is required.
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Production
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Delivery
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