30+ Years Experienced custom fastener manufacturer &  factory committed 0 PPM for production

How to choose flat washer?


How to choose flat washer?

         Flat washer is a kind of flat washer, which is mainly used to increase and tighten the contact area between screws and some large equipment. When using flat washer, it is usually suitable for the nut and nut to cooperate with each other. When storing flat washer, it must have essential important characteristics within the most effective sealing time:

flat washer

1. In case of bad environment, it should be said that the flat gasket should be sealed, and it is not easy to leak when a certain temperature and pressure are working.

2. When connecting the flat gasket and the contact surface, it is necessary to better ensure the sealing performance, just like a good effect.

3. Under the influence of temperature when the gasket is under pressure, the anti wrinkle ability should be better, otherwise the screw will be damaged and hard gas leakage will occur.

4. Do not get infected when using flat washerss.

5. The flat washer can be disassembled well. This is the biggest function of selecting flat washer.

6. Remember to ensure the normal use of flat washer at relative temperatures.

zinc flat washers

In order to better use flat washerss, try to choose flat washerss dipped in rust and corrosion resistant materials when selecting flat washerss, which not only saves time and labor, but also can play a very good role.

stainless steel flat washers

When used with bolts and nuts, the selection criteria of flat gaskets are:

1. When selecting gasket materials, attention should be paid to the electrochemical corrosion problem when different metals contact. The material of flat gasket is generally the same as that of the connected parts, usually steel, alloy steel, stainless steel, aluminum alloy, etc. Copper and copper alloy can be selected when there is a requirement for conductivity.

2. The inner diameter of the flat washer shall be selected according to the larger value of the thread or screw diameter. The larger value of the outer diameter of the connected material (such as composite material) or the spring washer should be selected.

3. When selecting the W washer under the bolt or screw head, in order to avoid interference between the fillet under the head and the washer, the flat washer with internal hole chamfer can be selected.

4. For important bolts with large diameter or in order to increase the anti extrusion capacity, steel washers shall be used. Steel washers shall be used for connection of tension bolts or tension shear composite bolts.

5. Special gaskets shall be applied to the parts with special requirements, and copper gaskets can be used if conducting is required; Sealing washers can be used if there are air tightness requirements.

brass Gasket

Function of flat washers:

1. Increase the contact area between the screw and the machine.

2. Eliminate the damage to the machine surface caused by the spring washers when removing the screws. When using, it must be: spring washers a flat washers, the flat washers is next to the machine surface, and the spring washers is between the flat washers and the nut. The flat washer is used to increase the stress surface of the screw. In order to prevent the screw from loosening, the spring washers can play a certain amount of buffer protection when it is stressed. Although flat washerss can be used as sacrificial washerss.

3. But more often, it is used as a supplementary washers or flat pressure washers.

black zinc washers


① By increasing the contact area, parts can be protected from damage;

② By increasing the contact area, the pressure between the nut and the equipment is reduced, thus playing a protective role.


① The flat washer can not play the role of anti-seismic;

② The flat washer also has no locking function.

What is the T-bolts?
What is a T-nut?
recommended for you
no data

Chuanghe Fastener Co, Ltd. (CHE )  offers OEM & ODM & Customized services to customer, which included cold heading, CNC processing center, wire cutting, powder metallurgy processing and assembly of metal parts with plastic parts.We have industry leading quality inspection equipment such as 3D scanner, Ultrasonic Flaw Detector etc  

Contact with us
Tel: +86-186 0769 4667

RM302, No.4 building Lizhou industrial Park, Shangshanqi, Zhushan District, Dongcheng Town, Dongguan City, China
Copyright © 2024 Chuanghe Fastener Co, Ltd. (CHE )  | Sitemap
Contact us
contact customer service
Contact us
Customer service