Standard:DIN6916
Description:
DIN 6916 washers, also known as chamfered washers, are specified by the German standard DIN 6916. These washers are designed for use with high-strength structural bolts and are commonly used in construction and engineering applications. The size range you mentioned, M12 to M36, refers to the metric thread size of the bolts they are designed to work with.
DIN 6916 washers can be available in a variety of surface finishes. Let's explore each of the finishes you mentioned:
1.Plain finish: Plain washers have no additional surface treatment or coating applied to them. They are made of raw metal without any specific protective or decorative coating. Plain washers are commonly used in applications where a specific surface finish is not required, or where other measures, such as lubrication or environmental protection, are used to maintain the desired performance and corrosion resistance.
2.Dacromet: Dacromet is a coating that provides excellent corrosion resistance. It is a non-electrolytic, water-based coating that contains metal particles and inorganic compounds. Dacromet coatings offer high levels of corrosion resistance, including resistance against salt spray, chemicals, and extreme temperatures. They are commonly used in applications where superior corrosion protection is required, such as in automotive, marine, and industrial environments.
3.Black Oxide: Black oxide coating, also known as blackening, is a conversion coating that creates a thin layer of black oxide on the surface of the washer. The black oxide finish enhances the aesthetics of the washers, provides some corrosion resistance, and can improve wear resistance and lubricity.
4.Zinc plated: Zinc plating is a common finish for washers. It involves applying a thin layer of zinc to the surface of the washer through an electroplating process. Zinc plating provides moderate corrosion resistance and helps protect the washer from rusting. It is commonly used in indoor or dry environments where exposure to moisture or corrosive elements is limited.
5.HDG (Hot-dip galvanized): Hot-dip galvanizing is a process where the washer is immersed in molten zinc, creating a thick, durable coating. HDG provides excellent corrosion resistance and is suitable for outdoor or highly corrosive environments. The thick layer of zinc coating acts as a barrier, protecting the washer from rust and corrosion.
The choice between plain, Dacromet, black oxide, zinc plated, or HDG finishes for DIN 6916 washers depends on the specific application requirements, considering factors such as the operating environment, load requirements, and desired level of corrosion protection. It's important to consult with industry standards, guidelines, and the specific needs of your application to ensure the appropriate choice of finish for the washers.
| Material | 45#/40CR |
| Size | M12-M36 |
| 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 (nominal size) |
Thickness (max) |
Thickness (min) |
Inside chamfer (min) |
Inside chamfer (max) |
External chamfer |
|---|---|---|---|---|---|---|---|---|---|---|
| M12 | 13 | 13.27 | 24 | 23.48 | 3 | 3.3 | 2.7 | 1.6 | 1.9 | 0.5 |
| M16 | 17 | 17.27 | 30 | 29.48 | 4 | 4.3 | 3.7 | 1.6 | 1.9 | 1 |
| M20 | 21 | 21.33 | 37 | 36.38 | 4 | 4.3 | 3.7 | 2 | 2.5 | 1 |
| M22 | 23 | 23.33 | 39 | 38.38 | 4 | 4.3 | 3.7 | 2 | 2.5 | 1 |
| M24 | 25 | 25.33 | 44 | 43.38 | 4 | 4.3 | 3.7 | 2 | 2.5 | 1 |
| M27 | 28 | 28.52 | 50 | 49 | 5 | 5.6 | 4.4 | 2.5 | 3 | 1 |
| M30 | 31 | 31.62 |
56 |
54.8 | 5 | 5.6 | 4.4 | 2.5 | 3 | 1 |
|
M36 |
37 | 37.62 | 66 | 64.8 | 6 | 6.6 | 5.4 | 3 | 3.5 | 1.5 |
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