The DIN125 Flat Washer is a precision-engineered industrial fastener designed to distribute the load of a threaded fastener, such as a bolt or nut, over a wider surface area. By increasing the bearing surface, these plain washers prevent the fastener from sinking into the material and significantly reduce surface pressure, ensuring a secure and stable connection in critical mechanical assemblies.
Manufactured to rigorous international standards, our DIN125 washers are available in a comprehensive range of sizes from M4 to M64 and high-grade carbon steel materials. Whether for heavy industry, automotive engineering, or general retail applications, these washers provide the essential structural support needed to maintain joint integrity and prevent material deformation under high tension.
Detailed Parameters
| Product Type | Flat Washer / Plain Washer (DIN125 & DIN9021) | Available Sizes | M4 to M64 |
|---|---|---|---|
| Material Grade | Carbon Steel: Q195, Q235, 1035, 1045, 65Mn | Strength Classes | Grade 4.8, 8.8, 10.9, 12.9 |
| Standards | GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS | Customization | OEM available according to drawings or samples |
| Surface Finish | Plain, Zinc Plated (Clear/Blue/Yellow/Black), Black, HDG, Dacromet | Certifications | ISO9001, SGS |
| Packaging | 5kg, 10kg, 25kg bag/carton + pallet or customized | Core Applications | Heavy Industry, Automotive, General & Retail Industry |
Key Advantages
Surface Protection
Prevents sinking of bearing surfaces and protects the fastened object from damage during tightening.
High Durability
Available in grades up to 12.9 and HDG finishes for superior wear and corrosion resistance.
Global Standards
Strict adherence to DIN, ISO, and ANSI standards ensuring perfect compatibility worldwide.
Load Distribution
Optimizes the distribution of force to reduce surface pressure on the joint material.
Precision Fit
Accurate tolerances for thread sizes from M3 up to M72 for professional engineering.
OEM Versatility
Fully customizable dimensions and materials based on your technical drawings or samples.
Product Gallery
Management Platforms
Inventory Control
Real-time tracking of washer stock across M4-M64 ranges to ensure rapid delivery.
Quality Assurance
ISO9001 certified production processes with rigorous SGS testing for every batch.
Order Monitoring
End-to-end visibility from raw material sourcing to final packaging and shipment.
Supply Chain Sync
Optimized logistics for bulk shipments (5kg to 25kg) to reduce lead times.
OEM Integration
Seamless transition from technical drawing to mass production for non-standard parts.
Material Tracking
Full traceability of carbon steel grades (Q235, 1045, 65Mn) for safety compliance.
Investment Return Comparison
| Feature | Standard Washers | Premium DIN125 Washers | Custom OEM Solutions |
|---|---|---|---|
| Joint Stability | Moderate | High (Optimized Surface) | Maximum (Precision Fit) |
| Corrosion Life | Short (Plain) | Long (HDG/Dacromet) | Project-Specific |
| Load Distribution | Basic | Professional Grade | Engineered Spec |
| Failure Rate | Standard | Ultra-Low (ISO Certified) | Minimal |
| Long-term Cost | High Replacement | Low Maintenance | Lowest Total Cost |
Frequently Asked Questions
Flat washers are used to increase the size of a screw's bearing surface area, which reduces the surface pressure applied on the fastened object and prevents the fastener from sinking into the material.
A fender washer has a much larger outside diameter in proportion to its center hole compared to a standard DIN125 washer, allowing it to distribute forces over an even larger area.
Yes. Flat washers distribute the tightening force evenly, while lock washers create tension to prevent the nut from loosening over time. They serve complementary functions.
Generally, the flat washer is placed first against the material, followed by the lock washer, and then the nut/fastener. This ensures the lock washer can securely hold everything in place.
For outdoor or corrosive environments, we recommend Hot Dip Galvanized (HDG) or Dacromet finishes, as they provide superior protection against rust and weather.
Yes, we provide full OEM services. We can manufacture custom fasteners and washers according to your specific technical drawings or provided samples.
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