A small, but very significant detail, without which perhaps not a single piece of furniture (wooden, plastic, plastic, less often metal) or a structure assembled with the help of fasteners, bolts, screws or self-tapping screws can do. This is a flat washer. This is exactly the small part that is placed before starting to tighten the bolt in the required hole.
Flat washers 11371 78 are metal (less often plastic or plastic) products (disks) required for reliable fastening of parts. They also serve as protection against damage that can be inflicted on the surface by screwed in bolts, in case the washer is removed. In addition, it is the washers that allow screws or self-tapping screws to hold on to the material more firmly and are their anchor points.
Today, the enterprise produces several types of flat washers that are in demand among consumers and are necessary not only for collecting furniture, but also for fastening various equipment, machines and units for the industrial sector.
Washers.
1. Flat without chamfer. Used in conjunction with bolts of various kinds as a part that increases the area of pressure on a fixed object.
2. Chamfered washer. In the middle it has a recess for a screw head or a bolt. The scope of use is the same as for the first type.
Washers have specific parameters for different types of tasks.
- the outer diameter varies from 4 to 92 millimeters.
- inner diameter starts at 1.7 and ends at 5.2 millimeters.
- washer thickness starts at 0.3 and ends at 8 millimeters.
The strength of the washers is assessed by two parameters, in particular for different accuracy classes, and there are several of them A, B and C, there is a variety of hardness according to the Vickers method:
- 140HV for accuracy class A
- 100HV for accuracy class C
Steel of various grades is used as a material for the manufacture of washers. For a longer service life, zinc chromated coatings of various thicknesses are applied to the washers. This helps protect the fastener from external influences and makes the washers less prone to corrosion.
It should be noted that washers are a necessary element in the places where parts are fastened with screws, where heavy loads are possible. By installing the washer, you can avoid unpleasant consequences in the form of deformation of parts of the structure and mechanical damage. Washers also help fix screws and bolts if their head is larger than the through hole. It will prevent a screwed-in bolt from falling through.
In factories, you can always find serial versions or order a small series of flat washers for assembling structures and equipment. Term e
