|
Inside diameter |
Sizes |
|||||
|
(in) |
(mm) |
USA, CA, MX |
UK, IE, AU, NZ |
CN, JP |
IT, ES, NL, CH |
|
|
0.618 |
15.7 |
5 |
J½ |
9 |
9.25 | |
|
0.626 |
15.9 |
5¼ |
K |
10 | ||
|
0.634 |
16.1 |
5½ |
K½ |
10 |
10.5 | |
|
0.642 |
16.31 |
5¾ |
L |
11.25 | ||
|
0.65 |
16.51 |
6 |
L½ |
11 |
11.75 | |
|
0.658 |
16.71 |
6¼ |
M |
12 |
12.5 | |
|
0.666 |
16.92 |
6½ |
M½ |
13 |
13.25 | |
|
0.674 |
17.12 |
6¾ |
N |
13.75 | ||
|
0.682 |
17.32 |
7 |
N½ |
14 |
14.5 | |
|
0.69 |
17.53 |
7¼ |
O |
15 | ||
|
0.698 |
17.73 |
7½ |
O½ |
15 |
15.75 | |
|
0.706 |
17.93 |
7¾ |
P |
16.25 | ||
|
0.714 |
18.14 |
8 |
P½ |
16 |
17 | |
|
0.722 |
18.34 |
8¼ |
Q |
17.5 | ||
|
0.73 |
18.54 |
8½ |
Q½ |
17 |
18.25 | |
|
0.738 |
18.75 |
8¾ |
R |
19 | ||
|
0.746 |
18.95 |
9 |
R½ |
18 |
19.5 | |
|
0.754 |
19.15 |
9¼ |
S |
20.25 | ||
|
0.762 |
19.35 |
9½ |
S½ |
19 |
20.75 | |
|
0.77 |
19.56 |
9¾ |
T |
21.5 | ||
|
0.778 |
19.76 |
10 |
T½ |
20 |
22 | |
|
0.786 |
19.96 |
10¼ |
U |
21 |
22.75 | |
|
0.794 |
20.17 |
10½ |
U½ |
22 |
23.25 | |
|
0.802 |
20.37 |
10¾ |
V |
24 | ||
|
0.81 |
20.57 |
11 |
V½ |
23 |
24.75 | |
|
0.818 |
20.78 |
11¼ |
W |
25.25 | ||
|
0.826 |
20.98 |
11½ |
W½ |
24 |
26 | |
|
0.834 |
21.18 |
11¾ |
X |
26.5 | ||