The washer refers to the part between the connector and the nut. A generally flat metal ring is used to protect the surface of the member to be attached from the nut and to disperse the pressure of the nut on the member to be joined.
washer
Washers are divided into: Plain washers - Class C, Large washers - Class A and C, Extra Large washers - Class C, Small washers - Class A, Plain washers - Class A, Plain washers - Chamfer type - Class A, Steel construction high Strength washers, spherical washers, taper washers, square bevel washers for I-beams, square bevel washers for channel steel, standard spring washers, light spring washers, heavy duty spring washers, internal tooth lock washers, internal serrated lock washers, External teeth lock washers, external serrated lock washers, monaural stop washers, binaural stop washers, outer tongue stop washers, and retainer washers for round nuts.
Plain washers are generally used in connection parts where one is soft, one is hard and brittle, and its main role is to increase the contact area, distribute the pressure, and prevent the soft crushing of the texture. The basic function of the spring of the spring washer is to give the nut a force after tightening the nut, which increases the friction between the nut and the bolt! Material is 65Mn (spring steel), heat treatment hardness is HRC44-51HRC, surface oxidation treatment.
Spring washers are widely used in bearing and non-load bearing structures of general mechanical products. They are characterized by low cost and easy installation, and are suitable for parts that are frequently installed and dismantled. Fast washers are available for automatic selection, but the spring washers have very low locking capacity! In particular, the adoption rate of products with high reliability in Europe and the United States is extremely low, especially the connection sites of important bearing structures have long been abandoned. Our country has some applications in the military industry, but it has been improved to stainless steel. Steel spring washers have long been forbidden in CASC! It is also said to be very unsafe because there are two 1s that are "rising circles" 2 and hydrogen embrittlement.