Product Overview
Flat washers are simple yet critical components designed to distribute the load of a threaded fastener across a wider surface area. They prevent damage to the material being fastened, reduce loosening caused by vibration, and provide a smooth bearing surface for nuts and bolt heads. As a fundamental element in virtually every assembly, our precision-manufactured washers ensure reliable performance and extended joint life.
Key Advantages
Optimal Load Distribution: Reduces surface pressure and prevents indentation or damage to soft materials.
Vibration Resistance: Helps maintain clamp load by compensating for surface irregularities.
Corrosion Barrier: Certain finishes act as a sacrificial layer, protecting both the fastener and the host material.
Electrical Isolation: Non-conductive materials (e.g., nylon) provide insulation in electrical applications.
Cost-Effective Protection: A simple, economical solution to prevent costly repair or wear of assembled parts.
Material Specifications
| Material Standard | Grade / Type | Key Characteristics |
|---|---|---|
| Low Carbon Steel | ASTM AISI 1008/1010 | General purpose, economical, suitable for plating. |
| Stainless Steel | ASTM A304 / 316 | Excellent corrosion resistance, high strength. |
| Spring Steel | ASTM AISI 1050 / 1070 | High hardness (HRC 38-45), used for lock washers. |
| Aluminum | 5052 / 6061 | Lightweight, good conductivity, corrosion resistant. |
| Brass / Copper | C36000 / C11000 | Good conductivity, corrosion resistant, non-magnetic. |
| Nylon / Plastic | PA6, PA66 | Electrical insulation, chemical resistance, lightweight. |
Product Series & Standards
Standard Flat Washers: Compliant with ASME B18.22.1, ISO 7089, and DIN 125.
Hardened Flat Washers: Compliant with ASME B18.22.2, SAE J113, for high-strength bolting.
Size Range: M1.6 to M24 (Metric); #2 to 1″ (Imperial). Custom sizes available.
Thickness & Hole Tolerance: Precision stamped to consistent dimensions for reliable fit and function.
Surface Finishes
| Finish Type | Standard / Specification | Typical Salt Spray Resistance |
|---|---|---|
| Plain / Uncoated | (Material finish as supplied) | Dependent on base material. |
| Zinc Plated (Blue/White/Yellow Chromate) | ASTM B633 | 72-96 hours to white rust. |
| Hot-Dip Galvanized | ASTM A153 | Up to 500 hours to red rust. |
| Electroplated Nickel | ASTM B456 | 96+ hours. |
| Passivation (Stainless Steel) | ASTM A967 | Enhanced corrosion resistance. |
| Black Oxide / Phosphated | MIL-DTL-13924 | Provides mild corrosion resistance & appearance. |
Quality Assurance
Our flat washers are manufactured under a certified ISO 9001:2015 quality management system. Dimensional checks, material certification, and batch traceability are standard. We comply with major international standards (ASME, ISO, DIN) to ensure global interoperability and reliability.
Manufacturing Partner
Hebei Wohe Fastener Manufacturing Co., Ltd. specializes in the high-volume production of precision stamping and cold-forming components. Our facility utilizes automated progressive die stamping presses to deliver consistent quality and dimensional accuracy for both standard and custom flat washer requirements. With a focus on export-oriented manufacturing, we ensure all products meet international specifications and are packaged for secure global shipment.
Availability: Wide range of standard sizes in stock.
Customization: Available in non-standard OD/ID/thickness, materials, and finishes.
MOQ: Stock items: negotiable. Custom projects: subject to design.
Lead Time: Standard items: 10-15 days. Custom items: based on requirement.
Technical specifications are based on standard production. Users are advised to validate suitability for specific applications. Product specifications are subject to improvement and may change.
