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Large Diameter Steel Fender Washers , Hardened Flat Washer M3 - M52 Size

Handan city Yongnian District Maide Fasteners Co. Ltd

Large Diameter Steel Fender Washers , Hardened Flat Washer M3 - M52 Size

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Brand Name : MAIDE

Model Number : M3-M56

Certification : ISO

Place of Origin : Yongnian,Hebei,China

MOQ : 1TON

Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram

Delivery Time : 7-30work days

Packaging Details : Bags (25kg)

Material : Iron

Size : M2-M56

Grade : 4.8

Color : Yellow

Standard : DIN BSW ANIS

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Yellow Color Steel Custom Flat Metal Washers With M3 - M52 Size High Strength

Product Description

Flat washers are mainly used to reduce the pressure. When some parts are tightened with large axial forces, the washers are easily pressed into a dish shape. In this case, the material can be changed and the hardness can be improved.


The locking effect of the spring washer is general, and the important parts are used as little or as little as possible, and the self-locking structure is adopted. For spring washers used for high-speed tightening (pneumatic or electric), it is best to use surface-phosphorized washers to increase their antifriction performance, otherwise they may easily generate frictional heat, burn out or open the mouth, and even damage the surface of the connected parts. Spring washer structures should not be used for thin plate connections. According to statistics, spring washers are used less and less in cars.


The tooth shape of the connection in the toothed elastic washers is used in the automotive industry due to the large and uniform locking force, while the spacing toothing is less.
For spring washers and spring washers, according to the national standard, 60, 70 and 65 Mn steels in GB699-1999 Quality Carbon Structural Steel can generally be selected.

Flat pad standard


National standards are different.
Here is the United States flat pad standard:

Specification Minor Diameter Outside Diameter Thickness Tolerance Thickness Tolerance Disintegration
USS 3/16 6.22~6.73 14.15~14.66 0.91~1.65 0.91~1.40
1.40~1.65            
USS 1/4 7.80~8.31 18.47~19.02 1.30~2.03 1.30~1.65
1.65~2.03            
USS 5/16 9.40~9.91 22.05~22.99 1.63~2.64 1.63~2.20
2.20~2.64            
USS 3/8 11.00~11.51 25.22~26.16 1.63~2.64 1.63~2.20
2.20~2.64            
USS 7/16 12.57~13.08 31.57~32.51 1.63~2.64 1.63~2.20
2.20~2.64            
USS 1/2 14.15~14.60 34.75~35.69 2.18~3.35 2.18~2.70
2.70~3.00            
3.00~3.35            
USS 9/16 15.75~16.26 37.13~38.07 2.18~3.35 2.18~2.70
2.70~3.00            
3.00~3.35            
USS 5/8 17.30~18.24 44.27~45.21 2.74~4.06 2.74~3.20
3.20~3.60            
3.60~4.06            
USS 3/4 20.45~21.39 50.62~51.56 3.10~4.50 3.10~3.60
3.60~4.20            
4.20~4.50            
USS 7/8 23.65~24.58 56.97~57.91 3.45~4.88 3.45~4.00
4.00~4.30            
4.30~4.88            
USS 1 26.80~27.74 63.32~64.26 3.45~4.88 3.45~4.00
4.00~4.30            
4.30~4.88            
USS 11/8 31.57~32.51 69.67~70.61 3.45~4.88 3.45~4.00
4.00~4.30            
4.30~4.88            
USS 11/4 34.75~35.69 76.02~76.96 3.45~4.88 3.45~4.00
4.00~4.30            
4.30~4.88            
USS 13/8 37.85~39.24 82.30~83.69 3.89~5.41 3.89~4.40
4.40~5.00            
5.00~5.41            
USS 11/2 41.02~42.42 88.65~90.04 3.89~5.41 3.89~4.40
4.40~5.00            
5.00~5.41            
USS 15/8 44.20~45.59 95.00~96.39 3.89~5.41 3.89~4.40
4.40~5.00            
5.00~5.41            
USS 13/4 47.37~48.77 101.35~102.74 3.89~5.41 3.89~4.40
4.40~5.00            
5.00~5.41            
USS 17/8 50.55~51.04 107.70~109.09 3.89~5.41 3.89~4.40
4.40~5.00            
5.00~5.41            
USS 2 53.72~55.12 114.05~115.44 3.89~5.41 3.89~4.40
4.40~5.00            
5.00~5.41            

The Role of Flat Mat

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


2. Eliminate damage to the surface of the machine when the spring pad is unloaded. When used, it must be a spring pad and a flat pad. The flat pad is facing the surface of the machine. The spring pad is between the flat pad and the nut.


Large Diameter Steel Fender Washers , Hardened Flat Washer M3 - M52 Size

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