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Metric O-ring Sizes
AS568A
O-Ring
Sizes
ID IN
MILLIMETERS

WIDTH IN
MILLIMETERS

2

1
2.5

1
3

1
3

1.5
3

2
3.1

1.6
3.3

1.6
3.5

1.5
3.7

1.6
4

1
4

1.25
4

1.5
4

1.6
4

2
4.1

1.6
4.3

2.4
4.4

0.8
4.5

1.5
4.7

1.6
4.9

1.9
5

1
5

1.5
5

2
5

2.5
5

3
5.3

2.4
5.5

2
5.7

1.9
6

1
6

1.5
6

2
6

2.5
6

3
6.3

2.4
6.5

1.5
6.9

1.4
7

1
7

1.5
7

2
7.1

1.6
7.2

1.9
7.3

2.4
7.5

1.5
7.6

2.4
8

1
8

1.5
8

2
8

2.5
8

3
8

4
8.1

1.6
8.3

2.4
8.5

3
8.6

2.4
8.9

1.9
9

1.5
9

1.8
9

2
9

2.5
9

3
9

3.5
9

4
9.1

1.6
9.3

2.2
9.3

2.4
9.5

0.8
9.6

2.4
10

1
10

1.5
10

2
10

2.5
10

3
10

4
10.1

1.6
10.3

2.4
10.5

2
11

1.5
11

2
11

2.5
11

3
11

3.5
11.3

2.4
11.63

1.35
11.89

1.92
12

1
12

1.5
12

2
12

2.5
12

3
12

3.5
12

4
12.3

2.4
12.5

0.8
12.5

1
12.9

1.24
13

1
13

1.5
13

2
13

2.5
13

3
13.1

1.6
13.3

2.4
13.5

2
13.5

2.5
13.95

2.62
14

1.5
14

2
14

2.5
14

3
14

3.5
14

4
14.3

2.4
15

1
15

1.5
15

2
15

2.5
15

3
15

4
15

3.5
15.3

2.4
15.6

2.4
16

1.5
16

2
16

2.5
16

3
16

3.5
16

4
16

5
16.3

2.4
17

1.5
17

2
17

2.5
17

3
17

3.5
17.3

2.2
17.86

2.62
18

1
18

1.5
18

2
18

2.5
18

3
18

4
18

5
19

1.5
19

2
19

2.5
19

3
19.3

2.4
20

1
20

1.5
20

2
20

2.5
20

3
20

3.5
20

4
20

5
21

1
21

1.5
21

2
21

2.5
21

3
22

1
22

1.5
22

2
22

2.5
22

3
22

3.5
22

4
22.3

2.4
23

2
23

2.5
23

3
24

2
24

2.5
24

3
24

4
25

1
25

1.5
25

2
25

2.5
25

3
25

4
25

5
25

6
25.3

2.4
26

2
26

2.5
26

3
26

3.5
26.5

3.5
27

0.8
27

2
27

2.5
27

3
27

4
27

5
27.3

2.4
28

1
28

1.5
28

2
28

2.5
28

3
28

3.5
28

4
28

5
29

3
29

3.5
29.1

1.5
29.1

1.6
29.6

2.4
29.7

3.5
30

2
30

2.5
30

3
30

3.5
30

4
30

5
31

2
31

3
31

3.5
32

2
32

2.5
32

3
32

3.5
32

4
32

5
32

6
32.5

2.5
33

3
33

3.5
33

4
33.5

1.5
33.5

4
34

2
34

3
35

2
35

2.5
35

3
35

3.5
35

4
35

5
36

2
36

3
36

3.5
36

4
37

1
37

2
37

3.5
37

4
38

2
38

2.5
38

3
38

4
39

2
39

3
39

4
40

2.5
40

3
40

3.5
40

4
40

5
41

3
41

4
42

2
42

3
42

3.5
42

4
43

2
43

3.5
44

2
44

3.5
44

4
44.4

3.1
45

3
45

3.5
45

4
45

5
46

3
46

4
47

4
48

4
48

6
50

2
50

2.5
50

3
50

4
50

5
50

6
51

3
52

2
52

3
52

4
53

4
54

2
54

3
54

4
55

2
55

3
55

4
55

5
56

3
56

4
57

2.5
57

3
57

4
58

4
59

3.5
60

2
60

3
60

3.5
60

4
60

5
61

2.5
61.9

3.53
63

5
64

2
64

2.5
65

3
65

4
65

5
66

2
67

3.5
68

2
68

3
68

6
69

4
70

2
70

3
70

5
72

2
72

4
74

2
74

3
74.3

2.62
74.5

3
75

3
78

6
79

1.78
80

3
80

4
80

5
80

6
82

3
83

3.5
84

3
85

5
86

3
88

3
88

6
89

2
89

3.5
90

2
90

2.5
90

3
91

2
92

5
93

2
94

3
97

3
98

3
100

5
102

3
106

2.5
111

3.5
111.5

2
114

3
114.2

5.7
116

3
117

4
119

4
124.5

3
125

4
125

5
128

3
135

3
139

3.5
140

4
140

4
142

3
144

3
145

3
152

3
152

4
155

5
158

3.5
165

2
165

10
169.3

5.7
172

4
173

4
174

3
174.2

5.7
184

4
195

5
209

3.5
210

3
210

5
240

5
317

7
375

6
376

6
475

10
508

9.525
G24


G25


G30


G35


G40


G45


G48


G50


G55


G60


G65


G70


G75


G80


G85


G90


G95


G100


G105


G110


G115


G120


G125


G130


G135


G145


G150


G155


G160


G170


G180


G200


G205


G240


G250


G260


G300


P3


P4


P5


P6


P7


P8


P9


P10


P10A


P11


P12


P14


P15


P16


P18


P20


P21


P22


P22A


P24


P25


P26


P29


P30


P31


P32


P34


P36