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Flange Head Screws DIN6921– M8x20– 10.9 alloy steel Dacromet
This International Standard specifies the characteristics of flange hexagon bolts ,with product grade A, with threads from M5 up to and including M16,length from 10mm to 200mm,and property classes 8.8, 9.8, 10.9 and A2-70,A4-70.
Flange head screws includes two kinds of serrated and smooth plane.
Flange surface increases the contact area, flange head screws tightened, there is a certain anti loose function.
If you are looking for flange head screws, please contact us for further information.
| Material | Steel | Stainless steel |
| General International requirements Standard | ISO 8992 | |
| Thread Tolerance International Standards | 6g | |
| ISO 261, ISO 965-2 | ||
| Mechanical Class properties International Standards | 8.8, 9.8, 10.9 | A2-70,A4-70 |
| ISO 898-1 | ISO 3506-1 | |
| Tolerances Product grade International Standard | A | |
| ISO 4759-1 | ||
| Finish | Black oxide Plain (thermic or chemical) Requirements for electroplating are covered in ISO 4042
If different electroplating requirements are desired or if requirements are needed for other finishes, they should be negotiated between customer and supplier.
Limits for surface discontinuities are covered in ISO 6157-3. | |