These Forgefix heavy-duty Form A Flat Washers are thicker than the more popular Form B type washers. They are bright Zinc Plated for increased corrosion resistance and conform to DIN125 standards. Washers provide a smooth surface for the nut or bolt to bear on, making it less likely to loosen as a result of an uneven fastening surface. The main purpose of a washer is to distribute the load under a bolt head or the nut face. On all manner of bolting applications. Can be used with all types of bolts and nuts. Zinc coatings prevent oxidation of the protected metal to create a longer lasting finish. It does this by forming a barrier and by acting as a sacrificial anode if this barrier is damaged. Zinc oxide is a fine white dust that (in contrast to iron oxide) does not trigger a breakdown of the substrate’s surface integrity as it is formed. The zinc oxide, if left intact, can act as a barrier to further oxidation, in a way similar to the protection afforded to aluminium and stainless steels by their oxide layers.
- For thread: M4
- Inside diameter min.: 4.3mm
- Inside diameter max.: 4.48mm
- Outside diameter min.: 8.64mm
- Outside diameter max.: 9.0mm
- Thickness min.: 0.7mm
- Thickness max.: 0.9mm
| Type |
Form A |
| Material |
Steel |
| Quantity |
100 |
| Size |
M4 |
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