Cross shaped round head machine thread screw with gasket, element head machine thread screw with gasket

Convex washers are mainly punched out of iron plates, usually in the shape of a flat washer with a hole in the middle. Flat washers are usually thin pieces of various shapes, used to reduce friction, prevent leakage, isolate, prevent loosening or dispersion of pressure. The rationality of their design structure and safety during use are crucial.

"A combination screw is actually a type of screw, with only a special feature. It is usually a three or two combination component, but at least a two combination component can be called a combination screw. The main difference between ordinary screws and ordinary screws is that they are equipped with an additional spring washer or a flat washer compared to ordinary screws. In the case of three combinations, there is an additional spring washer. This is the main difference in appearance between combination screws and regular screws.
In addition to obvious differences in appearance, the main difference between combination screws and ordinary screws is their mechanical properties and usage. A combination screw is a three component or two component with an elastic flat washer, of course, it is made of ordinary screws with elastic flat washers. If you put on the flat cushion, it won't come off. Tightened into a combination. In terms of mechanical performance, a combination screw is composed of three accessories, and in terms of performance, it definitely requires three fasteners to work together. The mechanical properties of the combined screws are more secure when used. More convenient, the biggest advantage of combining screws is that it can make the production line operation convenient and fast, improving work efficiency.
The main difference between the use of combination screws and ordinary screws lies in their versatility. Ordinary screws have a wider range of uses than combination screws, and almost all industrial products use ordinary screws. Combination screws are also useful! It is only available on specific product materials. When a screw needs to be used in conjunction with a spring washer and a flat washer, a combination screw can be used"

Usually, we need to first distinguish between fine-tooth nuts and coarse-tooth nuts, but in fact, regardless of the fine-tooth or coarse-tooth teeth, their specifications are the same, including M3, M4, M5, M6, M8, M10, and so on. But there is another type, which includes hexagonal nuts made in English or American, which is only based on different national standards. We produce in China, called national standard hexagonal nuts

"The anti loose washer has the characteristic of simple installation.
1. Simply place the diagonal tooth surfaces on the inner side of the two gaskets opposite each other and between the nut and the connecting material;
2. After the nut is tightened, the radial convex surface on the outside of the lock washer is engaged with the contact surfaces on both ends, and the slope angle of the bevel surface on the inside of the washer is greater than the thread angle of the bolt;
When the bolt is stretched due to mechanical vibration, the nut will rotate and loosen accordingly. Due to the fact that the frictional force on the outer radial convex surface of the lock washer is greater than the frictional force between the inner inclined tooth surfaces. In this state, only relative misalignment between the inner helical tooth surfaces is allowed, resulting in a certain amount of lifting tension;
When the bolt contracts, the helical tooth surface of the washer will cause the nut to return to its original position. Thus achieving 100% anti loosening and tightening effect;
5. Washers are suitable for flat and smooth surfaces;
If the connecting material is non-metallic, a metal plate can be fixed on the connecting material, so that a lock washer can be used;
7. There is no need to use a torque wrench when installing the lock washer;
8. When installing or removing the lock washer, you can choose to use Pneumatic tool"