Standard:DIN9021
Description:
DIN 9021 washers, also known as flat washers, are commonly used in various applications to evenly distribute the load of a threaded fastener, such as a bolt or screw, and provide a smooth surface for the nut or bolt head to bear against. The DIN 9021 standard specifies the dimensions and material requirements for these washers.
The size range of DIN 9021 washers is typically specified in metric measurements, such as M6 to M100. This indicates that DIN 9021 washers can accommodate metric fasteners with diameters ranging from M6 to M100.
DIN 9021 washers are available in two common coating options: plain and Dacromet.
Plain DIN 9021 washers do not have any surface coating or treatment. They are made from bare steel and provide basic protection against corrosion. Plain washers are typically used in applications where corrosion resistance is not a significant concern or where additional coating or protection measures will be applied.
Dacromet is a specialized coating option for DIN 9021 washers. It is a non-electrolytic, water-based coating that provides excellent corrosion resistance. Dacromet coatings are typically thin and uniform, offering a high level of protection against rust and other forms of corrosion. They are designed to withstand harsh environmental conditions, including exposure to moisture, salt spray, and chemicals. Dacromet coatings also provide good adhesion and are self-lubricating, reducing friction during assembly.
When selecting between plain and Dacromet DIN 9021 washers, consider the specific environmental conditions in which they will be used. If the application involves exposure to moisture, humidity, or corrosive substances, Dacromet-coated DIN 9021 washers would provide superior corrosion protection. For applications where corrosion resistance is not a significant concern or where additional protective measures will be applied, plain DIN 9021 washers may be suitable.
| Material | 45#/40CR |
| Size | M6-M100 |
| Finish | Plain/black/ZINC/HDG/Dacromet/Mechanical Galvanized |
| Hardness | HV300/HRC35-45 |
| Marking | can be Customized |
| Application | Constrution/Wind turbines/railway line |
| Packing | Carton+ pallet; we can pack washers as your requirements |
| Terms | FOB+shanghai/ningbo |
| Delivery time | 30-70days |
| Size |
Inner diameter(min) |
Inner diameter(max) |
Outside diameter(max) |
Outside diameter(min) |
Thickness (max) |
Nominal size |
Thickness (min) |
| 2.7 | 2.7 | 2.84 | 8 | 7.64 | 0.9 | 0.8 |
0.7 |
| 3.2 | 3.2 | 3.38 | 9 | 8.64 | 0.9 | 0.8 | 0.7 |
| 3.7 | 3.7 | 3.88 | 11 | 10.57 | 0.9 | 0.8 | 0.7 |
| 4.3 | 4.3 | 4.48 | 12 | 11.57 | 1.1 | 1 | 0.9 |
| 5.3 | 5.3 | 5.48 | 15 | 14.57 | 1.4 | 1.2 | 1 |
| 6.4 | 6.4 | 6.62 | 18 | 17.57 | 1.8 | 1.6 | 1.4 |
| 7.4 | 7.4 | 7.62 | 22 | 21.48 | 2.2 | 2 | 1.8 |
| 8.4 | 8.4 | 8.62 | 24 | 23.48 | 2.2 | 2 | 1.8 |
| 10.5 | 10.5 | 10.77 | 30 | 29.48 | 2.7 | 2.5 | 2.3 |
| 13 | 13 | 13.27 | 37 | 36.38 | 3.3 | 3 | 2.7 |
| 15 | 15 | 15.27 | 44 | 43.38 | 3.3 | 3 | 2.7 |
| 17 | 17 | 17.27 | 50 | 49.38 | 3.3 | 3 | 2.7 |
| 20 | 20 | 20.52 | 56 | 54.1 | 4.6 | 4 | 3.4 |
| 22 | 22 | 22.52 | 60 | 58.1 | 4.6 | 4 | 3.4 |
| 26 | 26 | 26.84 | 72 | 70.1 | 6 | 5 | 4 |
| 33 | 33 | 34 | 92 | 89.8 | 7 | 6 | 5 |
| 39 | 39 | 40 | 110 | 107.8 | 9.2 | 8 | 6.8 |
Products pictures for Flat washers
