Description
Overview
DIN9021 specifies the dimensions for large od washers, ensuring consistent fit and load distribution in bolted assemblies.
This selected size is specified with diameter M12, thread M12.
Sold in multiples of '100 pieces. 1 Box = '100 pieces.
Material, Grade & Strength
A2 (304) stainless steel provides excellent general corrosion resistance.
Finish & Corrosion Protection
Plain finish is intended for protected environments.
Typical Uses
Used beneath bolt heads and nuts to spread load, protect surfaces, improve locking or provide sealing depending on the washer type.
Technical Tips
- Select the washer type for the application.
- Match the inside diameter to the fastener size.
- Use compatible material and finish.
Dimensions – DIN 9021 / ISO 7093 M12
| Standard | DIN 9021 / ISO 7093 |
|---|---|
| Product | Flat washer, large OD (fender) |
| Nominal size | M12 |
| Inside diameter (d1) | 13 mm |
| Outside diameter (d2) | 37 mm |
| Thickness (h) | 3 mm |
| Weight (calculated) | 22.42 kg per 1 000 pieces |
Material, Grade & Strength
| Material | Stainless steel A2 (304) |
|---|---|
| Steel grade | AISI 304 (1.4301) |
| Composition | C max 0.07%, Cr 17.5-19.5%, Ni 8.0-10.5% |
| Typical use | general corrosion resistance, indoor/outdoor, food equipment |
Finish & Corrosion Protection
Plain / self colour: No applied coating. Stainless, brass and nylon parts are supplied plain; plain steel parts need oil, paint or protected environments.
DIN 9021 data sheet – all sizes
| Size | Nominal size | Inside diameter (d1) | Outside diameter (d2) | Thickness (h) |
|---|---|---|---|---|
| M3 | M3 | 3.2 mm | 9 mm | 0.8 mm |
| M4 | M4 | 4.3 mm | 12 mm | 1 mm |
| M5 | M5 | 5.3 mm | 15 mm | 1.2 mm |
| M6 | M6 | 6.4 mm | 18 mm | 1.6 mm |
| M8 | M8 | 8.4 mm | 24 mm | 2 mm |
| M10 | M10 | 10.5 mm | 30 mm | 2.5 mm |
| M12 | M12 | 13 mm | 37 mm | 3 mm |
| M14 | M14 | 15 mm | 44 mm | 3 mm |
| M16 | M16 | 17 mm | 50 mm | 3 mm |
| M20 | M20 | 22 mm | 60 mm | 4 mm |
| M24 | M24 | 26 mm | 72 mm | 5 mm |
Nominal dimensions per DIN 9021 / ISO 7093. Weights are calculated from nominal dimensions and are a guide only (±10%). Values for fit and strength should be confirmed against the standard for critical applications.
Specifications
| Measurement Type | Metric |
|---|---|
| Thread Size | M12 |
| Inner Diameter | 13 |
| Outer Diameter | 37 |
| Diameter | M12 |
| Thickness | 3 |
| Material | Stainless Steel |
| Finish | Plain |
| Grade | Grade (A2) |
| Standards Met | DIN 9021 |
| Package Quantity | 100 |
| Package Type | Box |