Plain Washer sizes, flat washer dimensions, metric flat washer dimensions, washer sizes in mm

washer size chart in mm, washer standard size chart, form a washers dimensions, standard washer dimensions, form b washers dimensions

Washer

Washer



Material in Stock
Mild Steel (M.S.), Stainless Steel (S.S.) grade 202, 304, 316

Washer Size Chart

SIZE 
INSIDE 
DIAMETER
OUTSIDE 
DIAMETER
THICKNESS
 
 
SAE FLAT WASHERS
#6 5/32" 3/8" 3/64"
#8 3/16" 7/16" 3/64"
#10 7/32" 1/2" 3/64"
1/4 9/32" 5/8" 1/16"
5/16 11/32" 11/16" 1/16"
3/8 13/32" 13/16" 1/16"
7/16 15/32" 59/64" 1/16"
1/2 17/32" 1-1/16" 3/32"
9/16 19/32" 1-3/16" 3/32"
5/8 21/32" 1-5/16" 3/32"
3/4 13/16" 1-1/2" 9/64"
7/8 15/16" 1-3/4" 9/64"
1" 1-1/16" 2" 9/64"
1-1/8 1-3/16" 2-1/4" 9/64"
1-1/4 1-5/16" 2-1/2" 5/32"
1-1/2 1-7/16" 3" 3/16"
 
USS FLAT WASHERS
3/16 1/4" 9/16" 3/64"
1/4 5/16" 3/4" 1/16"
5/16 3/8" 7/8" 5/64"
3/8 7/16" 1" 5/64"
7/16 1/2" 1-1/4" 5/64"
1/2 9/16" 1-3/8" 7/64"
9/16 5/8" 1-1/2" 7/64"
5/8 11/16" 1-3/4" 9/64"
3/4 13/16" 2" 5/32"
7/8 15/16" 2-1/4" 11/64"
1" 1-1/16" 2-1/2" 11/64"
1-1/8 1-1/4" 2-3/4" 11/64"
1-1/4 1-3/8" 3" 11/64"
1-3/8 1-1/2" 3-1/4" 3/16"
1-1/2 1-5/8" 3-1/2" 3/16"
1-5/8 1-3/4" 3-3/4" 3/16"
1-3/4 1-7/8" 4" 3/16"
1-7/8 2" 4-1/4" 3/16"
2" 2-1/8" 4-1/2" 3/16"
2-1/2 2-5/8" 5" 15/64"
3" 3-1/8" 5-1/2" 9/32"

The following tables define the sizes for metric flat washers per ISO 7089.

Flat Washer Per. ISO 7089 Size Table
All size units given in mm

For Screw
Nominal Size
Hole Diameter Outside Diameter Washer Thickness
M1.6 1.7 4 0.3
M2 2.2 5 0.3
M2.5 2.7 6 0.5
M2.6 2.8 7 0.5
M3 3.2 7 0.5
M3.5 3.7 8 0.5
M4 4.3 9 0.8
M5 5.3 10 1
M6 6.4 12 1.6
M7 7.4 14 1.6
M8 8.4 16 1.6
M10 10.5 20 2
M12 13 24 2.5
M14 15 28 2.5
M16 17 30 3
M18 19 34 3
M20 21 37 3
M22 23 39 3
M24 25 44 4
M27 28 50 4
M30 31 56 4
M33 34 60 5
M36 37 66 5
M39 40 72 6
M42 43 78 7
M45 46 85 7
M48 50 92 8
M52 54 98 8
M56 58 105 9

Flat Washer Per. ISO 7416 Size Chart 
All size units given in mm

Nominal Size Hole Dia Outside Dia Washer Thick
12.0000 13.0000 25.0000 4.60000
16.0000 17.0000 33.0000 4.60000
20.0000 21.0000 40.0000 4.60000
24.0000 25.0000 47.0000 4.60000
30.0000 31.0000 56.0000 5.60000
36.0000 37.0000 66.0000 5.60000
American Metric Washers s ANSI B18.22M Size Table

Metric plain washers should be specified in the sequence : description, nominal size, series, material type, and finish, if required.

American Metric Washers ANSI B18.22M Size Table

American National Standard Metric Plain Washers

Washer 
Sizea
Washer 
Series
Inside Diameter
A
Outside Diameter
B
Thickness
C
Max Min Max Min Max Min
1.6 Narrow
Regular
Wide
2.09
2.09
2.09
1.95
1.95
1.95
4.00
5.00
6.00
3.70
4.70 
5.70
0.70 
0.70 
0.90
0.50
0.50
0.60
2 Narrow
Regular
Wide
2.64
2.64
2.64
2.50
2.50
2.50
5.00
6.00
8.00
4.70 
5.70 
7.64
0.90 
0.90
0.90
0.60
0.60 
0.60
2.5 Narrow
Regular
Wide
3.14
3.14
3.14
3.00
3.00
3.00
6.00
8.00
10.00
5.70 
7.64 
9.64
0.90
0.90 
1.20
0.60 
0.60
0.80
3 Narrow
Regular
Wide
3.68
3.68
3.68
3.50
3.50
3.50
7.00
10.00
12.00
6.64
9.64 
11.57
0.90
1.20
1.40
0.60 
0.80 
1.00
3.5 Narrow
Regular
Wide
4.18
4.18
4.18
4.00
4.00
4.00
9.00
10.00
15.00
8.64 
9.64 
14.57
1.20
1.40 
1.75
0.80 
1.00 
1.20
4 Narrow
Regular
Wide
4.88
4.88
4.88
4.70
4.70
4.70
10.00
12.00
16.00
9.64 
11.57
15.57
1.20 
1.40 
2.30
0.80 
1.00
1.60
5 Narrow
Regular
Wide
5.78
5.78
5.78
5.50
5.50
5.50
11.00
15.00
20.00
10.57 
14.57 
19.48
1.40
1.75 
2.30
1.00
1.20 
1.60
6 Narrow
Regular
Wide
6.87
6.87
6.87
6.65
6.65
6.65
13.00
18.80
25.40
12.57 
18.37 
24.88
1.75
1.75
2.30
1.20 
1.20 
1.60
8 Narrow
Regular
Wide
9.12
9.12
9.12
8.90
8.90
8.90
18.80 b 
25.40 b 
32.00
18.37 b 
24.48 b 
31.38
2.30 
2.30 
2.80
1.60 
1.60 
2.00
10 Narrow
Regular
Wide
11.12
11.12
11.12
10.85
10.85
10.85
20.00 
28.00 
39.00
19.48 
27.48 
38.38
2.30 
2.80
3.50
1.60 
2.00 
2.50
12 Narrow
Regular
Wide
13.57
13.57
13.57
13.30
13.30
13.30
25.40 
34.00 
44.00
24.88 
33.38 
43.38
2.80 
3.50
3.50
2.00
2.50
2.50
14 Narrow
Regular
Wide
15.52
15.52
15.52
15.25
15.25
15.25
28.00 
39.00 
50.00

27.48
38.38
49.38

2.80
3.50 
4.00
2.00
2.50 
3.00
16 Narrow
Regular
Wide
17.52
17.52
17.52
17.25
17.25
17.25
32.00 
44.00 
56.00
31.38 
43.38
54.80
3.50 
4.00
4.60
2.50 
3.00 
3.50
20 Narrow
Regular
Wide
22.32
22.32
22.32
21.80
21.80
21.80
39.00 
50.00 
66.00
38.38 
49.38 
64.80
4.00
4.60 
5.10
3.00
3.50
4.00
24 Narrow
Regular
Wide
26.12
26.12
26.12
25.60
25.60
25.60
44.00 
56.00
72.00
43.38 
54.80 
70.80
4.60
5.10 
5.60
3.50
4.00 
4.50
30 Narrow
Regular
Wide
33.02
33.02
33.02
32.40
32.40
32.40
56.00 
72.00 
90.00
54.80
70.80 
88.60
5.10 
5.60 
6.40
4.00 
4.50
5.00
36 Narrow
Regular
Wide
38.92
38.92
38.92
38.30
38.30
38.30
66.00 
90.00
110.00
64.80
88.60 
108.60
5.60
6.40
8.50
4.50 
5.00 
7.00

a Nominal washer sizes are intended for use with comparable screw and bolt sizes. 
b The 18.80 ⁄18.37 and 25.40 ⁄24.48 mm outside diameters avoid washers which could be used in coin-operated devices.

All dimensions are in millimeters.

Metric, Flat Washers Specification DIN 125 Design Table

Metric, Flat Washers, per. Specification DIN 125, Part 2, Type A

This table define the dimensional limits of metric washers sizes M1.6 to M28 which are medium type, primarily for hexagon bolts. This standard has been withdrawn and replaced by the following:

DIN EN ISO 7089, DIN EN ISO 7090, ISO 7089, ISO 7090

Thread Size d1 d2 h d3
Clearance Hole Diameter Outside Diameter Thickness
Min. Max. Max. Min. Max. Min. Max. Min.
M1.6 1.7 1.84 4 3.7 0.35 0.25 2 1.8
M1.7 1.8 1.94 4.5 4.2 0.35 0.25 2.1 1.9
M2 2.2 2.34 5 4.7 0.35 0.25 2.6 2.4
M2.3 2.5 2.64 6 5.7 0.55 0.45 2.9 2.7
M2.5 2.7 2.84 6 5.7 0.55 0.45 3.1 2.9
M2.6 2.8 2.94 7 6.64 0.55 0.45 3.2 3
M3 3.2 3.38 7 6.64 0.55 0.45 3.6 3.4
M3.5 3.7 3.88 8 7.64 0.55 0.45 4.1 3.9
M4 4.3 4.48 9 8.64 0.9 0.7 4.7 4.5
M5 5.3 5.48 10 9.64 1.1 0.9 5.7 5.5
M6 6.4 6.62 12 11.57 1.8 1.4 6.8 6.6
M7 7.4 7.62 14 13.57 1.8 1.4 7.8 7.6
M8 8.4 8.62 16 15.57 1.8 1.4 9.2 9
M10 10.5 10.77 20 19.48 2.2 1.8 11.2 11
M12 13 13.27 24 23.48 2.7 2.3 13.7 13.5
M14 15 15.27 28 27.48 2.7 2.3 15.7 15.5
M16 17 17.27 30 29.48 3.3 2.7 17.7 17.5
M18 19 19.33 34 33.38 3.3 2.7 20.2 20
M20 21 21.33 37 36.38 3.3 2.7 22.4 22
M22 23 23.33 39 38.38 3.3 2.7 24.4 24
M24 25 25.33 44 43.38 4.3 3.7 26.4 26
M26 27 27.33 50 49.38 4.3 3.7 28.4 28
M27 28 28.33 50 49.38 4.3 3.7 30.4 30
M28 29 29.33 50 49.38 4.3 3.7 31.4 31

This table define the dimensional limits of metric washers sizes M30 to M160

d3
Thread Size d1 d2 h  
Clearance Hole Diameter Outside Diameter Thickness
Min. Max. Max. Min. Max. Min. Max. Min.
M30 31 31.39 56 55.26 4.3 3.7 33.4 33
M32 33 33.62 60 58.8 5.6 4.4 35.4 35
M33 34 34.62 60 58.8 5.6 4.4 36.4 36
M35 36 36.62 66 64.8 5.6 4.4 38.4 38
M36 37 37.62 66 64.8 5.6 4.4 39.4 39
M38 39 39.62 72 70.8 6.6 5.4 41.4 41
M39 40 40.62 72 70.8 6.6 5.4 42.4 42
M40 41 41.62 72 70.8 6.6 5.4 43.6 43
M42 43 43.62 78 76.8 8 6 45.6 45
M45 46 46.62 85 83.6 8 6 48.6 48
M48 50 50.62 92 90.6 9 7 52.6 52
M50 52 52.74 92 90.6 9 7 54.6 54
M52 54 54.74 98 96.6 9 7 56.6 56
M55 57 57.74 105 103.6 10 8 60 59
M56 58 58.74 105 103.6 10 8 63 62
M58 60 60.74 110 108.6 10 8 65 64
M60 62 62.74 110 108.6 10 8 67 66
M64 66 66.74 115 113.6 10 8 71 70
M68 70 70.74 120 118.6 11 9 75 74
M72 74 74.74 125 123.4 11 9 79 78
M76 78 78.74 135 133.4 11 9 83 82
M80 82 82.87 140 138.4 13.2 10.8 87 86
M85 87 87.87 145 143.4 13.2 10.8 92 91
M90 93 93.87 160 158.4 13.2 10.8 97 96
M95 98 98.87 165 163.4 13.2 10.8 102 101
M100 104 104.87 175 173.4 15.2 12.8 108 107
M105 109 109.87 180 178.4 15.2 12.8 113 112
M110 114 114.87 185 183.15 15.2 12.8 118 117
M115 119 119.87 200 188.15 15.2 12.8 123 122
M120 124 125 210 208.15 17.2 14.8 128 127
M125 129 130 220 218.15 17.2 14.8 133 132
M130 134 135 220 218.15 17.2 14.8 138 137
M135 139 140 230 228.15 17.2 14.8 143 142
M140 144 145 240 238.15 19.2 16.8 148 147
M145 149 150 250 248.15 19.2 16.8 153 152
M150 155 156 250 248.15 19.2 16.8 159 158
M160 165 166 250 248.15 19.2 16.8 169 168