DIN9021 Large Plain Washer
DIN9021 large plain washer is a wide-diameter fastening component designed to provide increased load distribution and surface protection in bolted connections. The DIN9021 large plain washer features a larger outer diameter compared with standard washers, allowing it to spread clamping force over a wider area and reduce pressure on connected materials.
Manufactured from carbon steel, stainless steel, or other suitable materials, the DIN9021 large plain washer offers reliable mechanical performance and versatile application options. It is widely used in construction, machinery, automotive assemblies, electrical equipment, and industrial fastening systems requiring enhanced bearing support.
Product Overview
The DIN9021 large plain washer is engineered for applications where standard washers cannot provide sufficient surface coverage. Its enlarged outer diameter improves load distribution and helps prevent deformation of softer materials such as plastic, wood, thin metal sheets, and composite components.
Compared with conventional flat washers, the DIN9021 large plain washer provides a greater supporting area while maintaining compatibility with common bolts and screws. It is suitable for both general fastening applications and customized industrial assemblies.
As a commonly used industrial fastener accessory, it is widely selected by OEM manufacturers, distributors, machinery builders, and engineering contractors.
Product Specifications
| Item | Description |
|---|---|
| Standard | DIN9021 |
| Product Name | Large Plain Washer |
| Material | Carbon Steel / Stainless Steel / Customized |
| Washer Type | Large Outside Diameter Flat Washer |
| Shape | Round Flat Washer |
| Size Range | M2–M30 |
| Inner Diameter | According to DIN9021 Standard |
| Outer Diameter | Larger Than Standard Flat Washer |
| Thickness | According to DIN9021 Standard |
| Surface Finish | Plain / Zinc Plated / Black Oxide / Stainless Finish |
| Installation Type | Bolt and Screw Assembly |
| Packaging | Bulk / Carton / OEM Packaging |
| Customization | Size, material, finish available |
Technical Parameters
| Parameter | Value |
|---|---|
| Material Grade | Carbon Steel / Stainless Steel |
| Tensile Strength | According to material grade |
| Yield Strength | According to material grade |
| Hardness | Controlled according to requirement |
| Density | Steel Approx. 7.85–7.98 g/cm³ |
| Load Distribution | Excellent due to large bearing area |
| Corrosion Resistance | Depends on material and coating |
| Manufacturing Standard | DIN9021 |
Materials and Manufacturing Process
The DIN9021 large plain washer is manufactured through precision metal processing to ensure accurate dimensions, smooth edges, and reliable fastening performance.
- Raw material selection: High-quality steel strip, stainless steel sheet, or customized material
- Stamping process: Precision punching to form washer geometry
- Hole processing: Accurate inner diameter production
- Edge finishing: Removes burrs and sharp edges
- Heat treatment: Applied when required for strength improvement
- Surface finishing: Zinc plating, black oxide, polishing, or customized coating
- Inspection: Dimensional accuracy, thickness, and surface quality testing
- Packaging: Protective industrial packaging for transportation
Each DIN9021 large plain washer is produced under strict quality control to ensure consistent product performance.
Applications of the Product
The DIN9021 large plain washer is widely used across multiple industries:
- Construction industry: Structural fastening and building assemblies
- Machinery manufacturing: Equipment installation and maintenance
- Automotive industry: Vehicle component connections
- Electrical equipment: Panel and enclosure fastening
- Furniture manufacturing: Hardware assembly applications
- Plastic products: Preventing surface deformation
- Industrial equipment: Mechanical fastening systems
- OEM manufacturing: Customized assembly solutions
Its large bearing surface makes it especially suitable for applications involving thin materials or lower-strength surfaces.
Why Choose This Product
- DIN9021 standard compatibility
- Large outer diameter improves load distribution
- Protects connected surfaces from bolt pressure
- Available in multiple materials
- Suitable for various industrial applications
- Reliable dimensional accuracy
- Multiple surface treatments available
- Cost-effective fastening solution
- OEM customization support
The DIN9021 large plain washer provides dependable support for applications requiring increased contact area and fastening stability.
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fasteners and customized fastening solutions.
- Advanced stamping and machining capability
- Experience with standard and custom washer production
- Support for carbon steel and stainless steel materials
- OEM/ODM customization support
- Stable production capacity for bulk orders
- Strict quality inspection procedures
- Global export experience
- Engineering support for customized applications
Flybear provides reliable fastening products for distributors, OEM manufacturers, and industrial customers worldwide.
Quality Inspection and Control
Quality assurance is maintained throughout production:
- Raw material chemical composition analysis
- Material certificate verification
- Inner and outer diameter inspection
- Thickness measurement
- Flatness inspection
- Surface finish inspection
- Dimensional tolerance verification
- Packaging quality inspection
All manufacturing processes follow ISO-based quality management systems to ensure consistent product reliability.
Selection Guide
When selecting a DIN9021 large plain washer, consider:
- Bolt and screw size compatibility
- Required bearing surface area
- Material strength requirements
- Application environment
- Corrosion protection needs
- Connected material type
Correct selection helps improve joint stability and prevents surface damage during fastening.
FAQ
1. What is DIN9021 large plain washer used for?
It is used to distribute fastening loads over a larger area and protect connected surfaces.
2. What makes DIN9021 different from standard washers?
DIN9021 washers have a larger outside diameter for improved load distribution.
3. What materials are available for DIN9021 washers?
Common materials include carbon steel, stainless steel, and customized alloys.
4. Can DIN9021 washers be customized?
Yes, Flybear supports customized sizes, materials, finishes, and packaging.
5. Are DIN9021 washers suitable for soft materials?
Yes, their larger bearing area helps reduce pressure on softer surfaces.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
Contact us for quotation, customization, and technical support via Contact Us.
