Customized SUS304 Stainless Steel flat or Thick metal washers fasteners for sealing use

First, the definition of the gasket:
A gasket is a part that is padded between a connected piece and a nut. Generally, it is a flat metal ring for protecting the surface of the connected member from the nut and the pressure of the dispersing nut against the connected member. The gasket is divided into a spherical washer, a tapered washer, and a square washer for the I-steel.

Second, the role of the gasket:
1. In the screw with nut, the function of the gasket is to increase the contact area, reduce the pressure, and protect the parts and screws.
2. A gasket is a material made of paper, rubber sheet or copper sheet placed between two planes to reinforce the seal, and a sealing member disposed between the static sealing surfaces to prevent fluid leakage.
3. The gasket is a mechanical seal between two objects, usually used to prevent pressure, corrosion, and natural thermal expansion and contraction between the two objects. Since the machined surface is not perfect, the gasket can be used to fill the irregularities. The gasket is usually made of sheet material such as mat paper, rubber, silicone rubber, metal, cork, felt, neoprene, nitrile rubber, fiberglass or plastic polymer (such as Teflon). Gaskets for specific applications may contain asbestos.
4. Generally, the screw with the nut is fixed in the through hole. The diameter of the through hole is generally slightly larger than the screw. Therefore, a gasket is needed to increase the contact area. Protect the parts. Lock parts, reduce pressure, and protect parts and screws.

Classification:
Washers are divided into: flat washers - class C, large washers - A and C grades, extra large washers - C grade, small washers - grade A, flat washers - grade A, flat washers - chamfered type - A grade, high steel structure Strength washers, spherical washers, tapered washers, square slant washers for I-steel, square slant washers for channel steel, standard spring washers, light spring washers, heavy duty spring washers, internal tooth lock washers, internal serrated lock washers, External tooth lock washer, external serrated lock washer, single ear stop washer, binaural stop washer, outer tongue stop washer, and retaining washer for round nut.

Flat washers are generally used in the joints. One is soft and the other is hard and brittle. Its main function is to increase the contact area, disperse the pressure, and prevent the soft texture from being crushed. The basic function of the spring washer spring is to force the nut after the nut is tightened, and increase the friction between the nut and the bolt! The material is 65Mn (spring steel), heat treatment hardness is HRC44 ~ 51HRC, and is surface oxidized.

Washer, snap spring is a flexible mat or card:

Lock washer A washer that prevents loose bolts. The working principle of the lock washer is very simple. It consists of two washers. The outer side has a radial embossed surface and the inner side is a slanted flank. When assembled, the inner oblique tooth faces are opposite each other, and the outer radial ridge surface is in a meshing state with the contact faces at both ends. When the connecting member is subjected to vibration and the bolt is loosened, only the inner side of the two washers is allowed to be opposed to each other. Displacement, resulting in lifting tension, thus achieving 100% locking.

Spring washers are widely used in the bearing and non-bearing structures of general mechanical products. They are characterized by low cost and easy installation, and are suitable for parts with frequent assembly and disassembly. Washer quick and easy automatic selection is included, but the spring washer's anti-loose ability is very low! Especially in Europe and the United States, the demand for highly reliable products is extremely low, especially the important bearing structure joints have long been abandoned. Our country has some applications in military industry, but it has been improved to stainless steel. Steel spring washers have long been banned in CASC! It is also said to be very unsafe, for two reasons 1 is "up circle" 2 is hydrogen embrittlement.

Spring washers are often referred to as spring pads in the screw industry. It is made of stainless steel and carbon steel, and carbon steel is also iron. Commonly used spring washers are available in sizes M3, M4, M5, M6, M8, M10.M12, M14, M16. These specifications are more common. The spring washer national standard GB/T 94.1-87, the standard specifies a standard spring washer with a size of 2-48mm.