ISO 7089 Flat Washer | Grade A | 200HV / 300HV | GFM-WCR System
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ISO 7089 is the premier international standard for plain, flat washers in the normal series with product grade A. Designed for high-precision mechanical assemblies, it ensures controlled load distribution under bolt heads and nuts, protecting surfaces from deformation during high-torque tightening.
As the modern global successor to the legacy DIN standards, ISO 7089 specifies exact dimensional tolerances and standardized hardness classes (200 HV / 300 HV), making it the universal choice for international engineering projects.
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ISO 7089 washers are characterized by their flat bearing surfaces and a no-chamfer outer diameter edge. This design provides maximum surface contact area for standard hex bolt connections. They are optimized to work with fasteners of property class 8.8 and above when specified in appropriate hardness grades.
- ISO 7089 = Plain Washers — Normal Series — Product Grade A
- Technical Scope: Flat washers without chamfer, with hardness classes 200 HV and 300 HV.
- Global Alignment: Directly replaces DIN 125-1 Form A for international engineering compliance.
| Parameter | Value |
|---|---|
| Standar | ISO 7089 |
| Series | Normal Series (Grade A) |
| Equivalent | DIN 125-1 Form A |
| Hardness Class | 200 HV / 300 HV |
| Size Range | M1.6 – M64 |
- Global automotive and aerospace assembly
- Renewable energy (Solar PV mounting & Wind turbines)
- Industrial machinery and heavy transport equipment
- Precision infrastructure and steel construction
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- ✔ High-hardness 200HV/300HV carbon steel in stock
- ✔ Stainless Steel (A2-70, A4-80) high-corrosion series
- ✔ Finishes: Geomet, Dacromet, Zinc, HDG available
- ✔ First order sample cost deductible
- ✔ Precision automatic stamping for superior flatness and thickness consistency
- ✔ Batch-controlled heat treatment to meet 200HV/300HV hardness classes
- ✔ Zero-burr finishing for critical safe assembly in electronic and industrial systems
- ✔ Strategic hub location for fast global shipping from Yongnian/Handan
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