What Is a DIN 433 Small OD Flat Washer?
DIN 433 Small Flat Washers
ISO Equivalent: ISO 7092 | Narrow Series Flat Washers
DIN 433 defines narrow (small OD) flat washers designed specifically for use with cheese head and countersunk screws where standard DIN 125 washers would be too large. The smaller outer diameter fits under smaller head profiles.
Quick Specifications
Type
Small OD Flat
OD Ratio
~1.8 × ID
Size Range
M1.6 – M36
Hardness
100-300 HV
ISO Equivalent
ISO 7092
Dimension Chart
| For Bolt | ID (d₁) | OD (d₂) | Thickness | vs DIN 125 OD |
|---|---|---|---|---|
| M3 | 3.2 mm | 6 mm | 0.5 mm | -1 mm |
| M4 | 4.3 mm | 8 mm | 0.5 mm | -1 mm |
| M5 | 5.3 mm | 9 mm | 1.0 mm | -1 mm |
| M6 | 6.4 mm | 11 mm | 1.6 mm | -1 mm |
| M8 | 8.4 mm | 15 mm | 1.6 mm | -1 mm |
| M10 | 10.5 mm | 18 mm | 1.6 mm | -2 mm |
| M12 | 13.0 mm | 20 mm | 2.0 mm | -4 mm |
| M16 | 17.0 mm | 28 mm | 2.5 mm | -2 mm |
When to Use DIN 433
🔩
Cheese Head Screws
Small OD fits under the narrow head of DIN 84 and similar cheese head screws.
📐
Countersunk Screws
For assemblies where a standard washer would protrude past the countersink.
📏
Tight Spaces
When standard washers would interfere with adjacent components.
💡 DIN 433 vs ISO 7092
Fully interchangeable — Both standards define small series flat washers with identical dimensions. Use when DIN 125/ISO 7089 is too large for the application.
Shop DIN 433 Small Flat Washers
Narrow series washers for cheese head and countersunk applications.
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