Flat washer

　　There is a calculation formula in the "Complete Quality Book of Standard Fasteners" published by China Standard Press, and the formula is: the weight of 1,000 pieces m=0.00785讃3.1416/4?washer height?[square of outer circle diameter-square of inner hole diameter]}

basic content

1. Increase the contact area between the screw and the machine. 2. Eliminate the damage of the spring pad to the machine surface when the screws are removed. When using, it must be a spring pad and a flat pad. The flat pad is next to the machine surface, and the spring pad is between the flat pad and the nut.

choice criterion

Flat washer is used as a part to prevent bolts and nuts from locking. Where fasteners are used, flat pads will be used. How to choose a suitable flat pad? Flat pad is a kind of flat washer, which is mainly used to enlarge and tighten the contact area between screws and some large equipment. When using flat pad, it is often suitable for nuts and nuts to be used together. When storing flat pad, it must be in the most effective sealing time, and it has the necessary important features:

1. In the case of harsh environment, it should be said that the flat pad should be sealed, and it is not easy to leak when a certain temperature and pressure are at work.

2. When the flat gasket is connected with the contact surface, it is necessary to better ensure the tightness, just like the just-right effect.

3. When the gasket receives pressure, under the influence of temperature, the anti-wrinkle ability should be better, otherwise the screw will be damaged and hard gas leakage will occur. 4. Don't get infected when using the flat pad.

5. The flat pad can be disassembled well. This is the biggest function of choosing a flat pad.

6. Remember to ensure the normal use at a relative temperature when using the flat pad.

In order to make better use of flat pads, when choosing flat pads, try to choose flat pads dipped with rust-proof and corrosion-proof materials, which will not only save time and labor, but also play a very good role.