AISI 420 Stainless Steel Plain Washer DIN125A
Product Overview
The AISI 420 Stainless Steel Plain Washer DIN125A is a precision-engineered flat washer designed to distribute clamping loads, protect contact surfaces, and improve fastening reliability in a wide range of industrial applications. Manufactured in accordance with the DIN125A standard, this stainless steel plain washer features a smooth surface, accurate dimensions, and excellent wear resistance.
Made from AISI 420 martensitic stainless steel, this washer offers higher hardness and mechanical strength than austenitic stainless steel grades such as 304 and 316 after heat treatment. It combines moderate corrosion resistance with outstanding abrasion resistance, making it suitable for applications requiring both durability and strength.
Widely used alongside bolts, screws, studs, and nuts, the DIN125A plain washer is an essential component in machinery, automotive assemblies, industrial equipment, tooling, and OEM manufacturing.
Product Specifications
| Item | Specification |
|---|---|
| Standard | DIN125A |
| Product Name | AISI 420 Stainless Steel Plain Washer |
| Material | AISI 420 Stainless Steel |
| Washer Type | Plain Flat Washer |
| Shape | Round |
| Inner Diameter | M2–M100 (Custom Sizes Available) |
| Outer Diameter | According to DIN125A Standard |
| Thickness | Standard DIN125A Dimensions |
| Surface Finish | Natural Stainless Steel |
| Hardness | Heat Treated (Optional) |
| Packaging | Bulk Cartons, Small Boxes, Pallets |
| Customization | Size, Hardness, Packaging, Laser Marking |
Technical Parameters
| Property | Value |
|---|---|
| Material Grade | AISI 420 Stainless Steel |
| Tensile Strength | Up to 700–950 MPa (Heat Treated) |
| Yield Strength | Approximately 450 MPa |
| Hardness | HRC 48–55 (After Heat Treatment) |
| Density | 7.75 g/cm³ |
| Corrosion Resistance | Moderate |
| Operating Temperature | -40°C to +450°C |
| Magnetic Property | Magnetic |
| Manufacturing Standard | DIN125A / ISO 7089 Equivalent |
Materials and Manufacturing Process
Production begins with carefully selected AISI 420 stainless steel that meets strict chemical composition requirements. The raw material is inspected before entering production to ensure consistent mechanical performance.
The washer blanks are manufactured through high-speed precision stamping. CNC-controlled equipment maintains dimensional accuracy and ensures burr-free edges.
Depending on customer requirements, heat treatment is performed to increase hardness, wear resistance, and fatigue performance. Controlled quenching and tempering processes help achieve stable mechanical properties throughout the production batch.
Following heat treatment, the washers undergo precision grinding or surface finishing when required to improve flatness and appearance. They are then cleaned to remove production residues while maintaining the natural stainless steel finish.
Each production lot receives comprehensive inspections before packaging to ensure compliance with DIN125A dimensional tolerances and customer specifications.
Applications of the Product
The AISI 420 Stainless Steel Plain Washer DIN125A is suitable for numerous industrial applications, including:
- Construction equipment
- Mechanical engineering
- Automotive manufacturing
- Industrial machinery
- Agricultural equipment
- Food processing machinery (non-direct food contact)
- Pump and valve systems
- Power transmission equipment
- Renewable energy installations
- Petrochemical equipment
- Marine hardware in moderate corrosion environments
- Industrial automation
- Manufacturing systems
- OEM equipment assembly
Its high hardness and wear resistance make it particularly suitable for applications involving repeated tightening, vibration, or high contact pressure.
Why Choose This Product
The AISI 420 Stainless Steel Plain Washer DIN125A provides several performance advantages:
- Premium AISI 420 stainless steel material
- High hardness after heat treatment
- Excellent wear resistance
- Good mechanical strength
- Stable dimensional accuracy
- Reliable load distribution
- Moderate corrosion resistance
- Long service life
- Consistent manufacturing quality
- Bulk inventory for fast delivery
- OEM and ODM customization available
- Suitable for demanding industrial environments
Why Choose Flybear
Flybear supplies high-quality industrial fasteners to customers across global markets.
Our strengths include:
- Advanced stamping and machining equipment
- Strict raw material sourcing
- Comprehensive quality management
- Flexible OEM and ODM manufacturing
- Large inventory capacity
- Engineering support for custom projects
- Stable production scheduling
- Reliable global logistics
- Technical consultation throughout the procurement process
We support distributors, OEM manufacturers, EPC contractors, and industrial buyers with dependable products and responsive service.
Quality Inspection and Control
Every batch undergoes rigorous quality inspections, including:
- Chemical composition analysis
- Hardness testing
- Tensile property verification
- Dimensional inspection
- Thickness measurement
- Inner and outer diameter inspection
- Surface finish inspection
- Flatness inspection
- Corrosion resistance testing
- Packaging inspection
Our production processes comply with ISO quality management system requirements to ensure consistent product quality and traceability.
Selection Guide
When selecting the appropriate DIN125A stainless steel plain washer, consider the following factors:
- Washer size matching the fastener
- Material grade
- Required hardness
- Load distribution requirements
- Operating environment
- Corrosion exposure
- Mechanical strength requirements
- Temperature conditions
- Equipment service life
- Applicable engineering standards
Selecting the correct washer helps improve joint stability, reduce surface damage, and extend equipment service life.
FAQ
What is DIN125A?
DIN125A is an internationally recognized standard that specifies the dimensions and tolerances for flat washers used with metric fasteners.
Why choose AISI 420 stainless steel?
AISI 420 offers higher hardness and wear resistance than 304 stainless steel after heat treatment, making it suitable for high-load and high-wear applications.
Is AISI 420 stainless steel corrosion resistant?
Yes. AISI 420 provides moderate corrosion resistance in dry and mildly corrosive environments, although it is generally less corrosion resistant than 304 or 316 stainless steel.
Can custom washer sizes be manufactured?
Yes. Flybear can produce customized dimensions, thicknesses, hardness levels, and packaging according to customer requirements.
How can I request a quotation?
Please provide the washer size, quantity, material requirements, heat treatment specification, packaging preference, and delivery destination. Our sales and engineering teams will prepare a detailed quotation promptly.
Conclusion
The AISI 420 Stainless Steel Plain Washer DIN125A delivers reliable load distribution, excellent wear resistance, and high mechanical strength for demanding industrial fastening applications. Manufactured with precision and strict quality control, it is an ideal choice for machinery, automotive, construction, and OEM industries.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
For quotations, customized manufacturing, or technical assistance, please Contact Us.
