PC Plain Washer
PC plain washer is a lightweight engineering plastic fastening component made from polycarbonate (PC), designed to distribute load, reduce surface damage, and provide electrical insulation in assembly systems. The PC plain washer is widely used in electronics, optical equipment, automotive interiors, and industrial plastic structures where corrosion resistance, insulation, and weight reduction are required.
The PC plain washer provides a smooth bearing surface between the fastener and the connected part, improving stability and reducing stress concentration during tightening.

Product Overview
The PC plain washer is engineered for load distribution and surface protection in non-metallic fastening systems. Its flat circular design ensures even pressure distribution, preventing damage to plastic, painted, or soft surfaces.
This PC plain washer is commonly used in assemblies where metal washers may cause corrosion, electrical conductivity, or surface scratching. Polycarbonate material provides high impact resistance and better dimensional stability compared to PP and PVC.
As a reliable industrial plastic fastener accessory, it is widely used in OEM manufacturing and precision engineering systems.
Product Specifications
| Item | Description |
|---|---|
| Product Name | PC Plain Washer |
| Material | Polycarbonate (PC) |
| Washer Type | Flat / Plain Washer |
| Inner Diameter | M3–M20 |
| Outer Diameter | Customizable (standard series available) |
| Thickness | 0.5mm–5mm |
| Color | Transparent / Black / Custom |
| Density | ~1.20 g/cm³ |
| Electrical Conductivity | Non-conductive |
| Chemical Resistance | Good (mild acids, oils) |
| Packaging | Bag / carton / OEM packaging |
| Customization | Size, thickness, color available |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | 55–70 MPa |
| Impact Resistance | Excellent (high toughness) |
| Heat Resistance | Up to 120°C |
| Chemical Resistance | Good (mild acids, alkalis, oils) |
| Electrical Insulation | Excellent |
| Water Absorption | Low |
| Dimensional Stability | Good |
| Manufacturing Standard | Industrial OEM specification |
Materials and Manufacturing Process
The PC plain washer is manufactured using precision stamping or injection molding depending on specification requirements.
- Raw material selection: High-grade polycarbonate resin
- Drying process: Moisture control before forming
- Injection molding / stamping: Formation of washer geometry
- Trimming: Edge finishing and flash removal
- Surface treatment: Optional polishing or smoothing
- Inspection: Dimensional and thickness control
- Packaging: Clean and protective packaging
Each PC plain washer is produced under strict quality control to ensure consistent performance and stability.
Applications of the Product
PC plain washers are widely used in:
- Electronics: PCB mounting and insulation spacing
- Automotive: Interior trim and lightweight assemblies
- Optical equipment: Precision spacing and protection
- Industrial machinery: Load distribution systems
- Medical devices: Non-metallic fastening structures
- Consumer electronics: Protective assembly components
- Smart devices: Lightweight insulation systems
Their insulating and cushioning properties make them ideal for sensitive assemblies.
Why Choose This Product
- High impact resistance polycarbonate material
- Excellent electrical insulation performance
- Prevents surface damage and stress concentration
- Lightweight and corrosion-free structure
- Better durability than PP and PVC washers
- Suitable for precision OEM applications
- Custom sizes and thickness available
- Stable performance in industrial environments
- Cost-effective insulation solution
The PC plain washer provides reliable load distribution and protection in modern engineering systems.
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fasteners and engineering plastic components for global OEM markets.
- Advanced molding and stamping capability
- Stable mass production for industrial supply chains
- Custom engineering support for plastic components
- Strict quality inspection and control systems
- Global export experience in fastener manufacturing
- Technical consultation for material selection
Flybear delivers reliable fastening solutions for electronics, automotive, and industrial plastic applications worldwide.
Quality Inspection and Control
Strict quality control ensures stable product performance:
- Raw material resin testing
- Dimensional accuracy inspection
- Thickness and flatness measurement
- Mechanical strength testing
- Heat resistance validation
- Surface quality inspection
- Insulation performance verification
- Packaging inspection
All processes follow ISO-based quality management standards.
Selection Guide
When selecting PC plain washers, consider:
- Load distribution requirements
- Temperature environment
- Chemical exposure conditions
- Electrical insulation needs
- Size compatibility with fasteners
- Surface protection requirements
Proper selection ensures long-term stability and performance.
FAQ
1. What is a PC plain washer used for?
It is used for load distribution, insulation, and surface protection in fastening systems.
2. Is PC better than PP for washers?
Yes, PC offers higher strength and impact resistance.
3. Can it be used in electronics?
Yes, it is non-conductive and widely used in electronic assemblies.
4. Does it prevent surface damage?
Yes, it distributes load and reduces surface stress.
5. Can custom sizes be made?
Yes, Flybear supports full customization.
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.



