Galvanized Flat Washer (GB97 Standard)
Premium Carbon Steel White Zinc Plating Grade 4.8 Strength
Product Name: Galvanized Flat Washer / Zinc-Plated Flat Washer.
Execution Standard: GB97 · Material: High-quality carbon steel · Surface: Zinc plating (white zinc plating).
Designed for construction, rail transit, automotive, general equipment, new energy, electronics, medical devices, furniture and more.
Precision cold stamping technology ensures no burrs, uniform zinc coating, excellent flatness and high torque resistance. The dense protective layer isolates moisture and provides superior rust & corrosion resistance, greatly extending service life under severe conditions.
Available in full-size series from M2 to M30 with multiple thickness options. Grade A manufacturing guarantees dimensional accuracy, even pressure distribution and anti-loosening performance for bolted assemblies.
⚙️ Performance & Strength
- Strength Grade: 4.8
- Hardness: Quenched & Tempered
- Corrosion: White Zinc, 72h Salt Spray
- Precision: Grade A (GB97)
- Flatness: ≤0.1mm tolerance
🔩 Complete Specifications
- Diameter range: M2 – M30
- Outer diameter: 4mm – 57mm
- Thickness: 0.5mm – 3.0mm
- Total models: 83+ sizes
- Compatibility: All standard screws/bolts
🏭 Applications
- ✔ Industrial machinery assembly
- ✔ Automotive & motorcycle maintenance
- ✔ New energy battery equipment
- ✔ Steel structure & rail transit
- ✔ Furniture & decoration
Note: The above specifications cover all models compatible with most screw/bolt fastening requirements. Thickness and outer diameter are according to GB97 Grade A.
✨ Exquisite Craftsmanship & Advantages
Integrated cold stamping technology — smooth and flat surface, no burrs, regular edges and perfect fitting. The zinc plating layer is uniform, dense, covering inner and outer surfaces to resist local rust or coating peeling.
Performance guarantee: Carbon steel material treated with quenching and tempering, reaching Grade 4.8 strength. It can withstand large pre-tightening force and pressure without fracture or deformation. Uniform thickness helps evenly disperse bolt pressure, prevents crushing soft materials (wood, plastic) and provides anti-slip, anti-wear between metal parts.
Cost-effective bulk supply: Ideal for industrial production, engineering construction and high-volume procurement. Ultra-low unit price with Grade A quality.
📌 Detailed Application Scenarios
Pressure dispersion & anti-loosening in mechanical assembly and automated lines.
Steel structures, bridges and railway equipment under vibration and outdoor corrosion.
Stable anti-rust and anti-loosening, wide model compatibility.
Battery equipment and communication devices, high flatness ensures conductivity.
Assembly of non-direct contact parts, meets conventional anti-rust standards.
Prevents wood crushing, improves connection stability.
Direct Contact Channels
- One-stop service: design, customization, production, and global delivery
- OEM/ODM solutions for industrial and export-oriented buyers
