Gaskets are divided into: Flat washer - C level, large washers - A and C level, large washers - C level, small washer - A level, flat washer - A level, flat washer - chamfering - A grade, steel structure with high strength gasket, spherical washer, cone washer, beams with inclined washer, channels with oblique gaskets, standard spring washer, light spring washer, heavy spring washers, internal tooth lock washer, serrated lock Washers, toothed lock washers, serrated lock washers, single-lug stop washers, double-lug stop washers, tongue stop washers, round nut stop washers.

Flat gasket is generally used in the connection of a soft texture, one is hard and brittle, its main role is to increase the contact area, disperse the pressure, to prevent the texture of soft crushed. The basic function of the spring washer is to tighten the nut after a force to increase the friction between the nut and the bolt! The material is 65Mn(spring steel), the heat treatment hardness is HRC44 ~ 51HRC, the surface oxidation treatment.

Washers (spring) gasket, spring is an elastic cushion or clamp gasket a washer to prevent loosening of bolts. The principle of the anti-loose gasket is very simple. It consists of two gaskets. The outer surface is radially convex and the inner surface is helical tooth. When assembling, the inner helical tooth surface is relative, the outer radial convex surface and the contact surface at both ends of the occluse. when the connecting piece is vibrated, and the bolt loosens, only the two gaskets between the inner helical tooth surface is relatively staggered, resulting in lifting tension, so as to achieve 100% locking.

Spring washers are widely used in load-bearing and non-load-bearing structures of general mechanical products. They are characterized by low cost and convenient installation, and are suitable for the parts with frequent assembly and disassembly. The automatic selection of gaskets is included, but the anti-loosening ability of spring gaskets is very low! Especially in the European and American countries require high reliability of the product adoption rate is very low, especially important load-bearing structure connection parts have been abandoned. Our country still has partial application in military industry, but it has been improved to stainless steel material.