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Ultimate Guide to Washer Specifications and Weight Charts

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What Is Washer?

A washer is a component that sits between the connected part and the nut.

Typically, it is a flat metal ring used to protect the surface of the connected part from being scratched by the nut and to distribute the pressure exerted by the nut on the connected part.

Washers are classified into:

  • flat washers – Class C
  • large washers – Classes A and C
  • extra-large washers – Class C
  • small washers – Class A
  • flat washers – Class A
  • flat washers – beveled type – Class A
  • high-strength washers for steel structures
  • spherical washers, conical washers
  • square sloped washers for I-beams
  • square sloped washers for channels
  • standard type spring washers
  • light-duty spring washers
  • heavy-duty spring washers
  • internal tooth lock washers
  • internal serrated lock washers
  • external tooth lock washers
  • external serrated lock washers
  • single ear stop washers
  • double ear stop washers
  • external tongue stop washers
  • stop washers for round nuts.

Washer Specifications and Weight Charts

1. Specification and weight chart for sloped washers

Nominal Diameter (Thread Diameter)dBHGB852-66 I-beam square sloped washerGB853-66 Channel square sloped washer
H1Weight per thousand (Kg)H1Weight per thousand (Kg)
671624.753.64
89182563.85
10112225.7104.26
12132826.7154.814
16173527.7255.419
-18204029.766748
20224039.760732
-22244039.765737
242650311.3100862
-272950311.3104890
3032603131809130
363870314.725010200

2. Specification and weight chart for spring washers

Nominal Diameter (Thread Diameter)dGB859-66 Light-dutyGB93-66
SbWeight per thousand (Kg)S(b)Weight per thousand (Kg)
44.10.81.20.131.20.18
55.111.20.191.60.41
66.21.21.60.3620.75
88.21.620.82.51.53
1010.222.51.5632.82
1212.32.53.53.413.54.63
-1414.3345.3946.85
1616.33.24.57.3647.75
-1818.33.55104.511
2020.545.514.1515.2
-2222.54.5618.9516.5
2424.54.86.523.7626.2
-2727.55.5732.3628.2
3030.56845.46.537.6
3636.6751.8
4242.6878.7
48499114

3. Specification and weight chart for flat washers

Nominal Diameter (Thread Diameter)dDSWeight per thousand (Kg)
Small washersWashersLarge circle washersSmall washersWashersLarge circle washersSmall washersWashersLarge circle washers
44.2810120.511.20.140.510.89
55.51012140.81.51.50.351.051.46
66.51214180.81.51.50.51.422.51
88.516182211.521.122.334.9
1010.51822281231.323.9812.1
1212.52225351.5233.255.7618.7
-1414.52528381.5343.8410.6129.8
1616.52832452346.3113.942.3
-1819.53035502346.4415.951.7
20213538552.54511.9924.7179.2
-22233842602.5451430.4494.4
24254045652.5461534.51131
-272850705652.87150
303155805663.59198
3638766117.6
4244806165.1
4850908276.1

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