French Metric (R) O-Ring Sizes
| french R Size | ID (mm) | ID Tol' (+/- mm) | CS (mm) | CS Tol' (mm) | ID (inch) | ID Tol' (+/- inch) | CS (inch) | CS Tol' (inch) |
|---|
| R000 |
1.15 |
0.13 |
1 |
0.08 |
0.045 |
0.005 |
0.039 |
0.003 |
| R00 |
2.2 |
1.6 |
0.087 |
0.063 |
| R1B |
2.75 |
0.14 |
0.108 |
0.006 |
| R5B |
6.35 |
0.16 |
1.78 |
0.250 |
0.006 |
0.070 |
| R8B |
9.52 |
0.17 |
0.375 |
0.007 |
| R0 |
2.4 |
0.13 |
1.9 |
0.09 |
0.094 |
0.005 |
0.075 |
0.004 |
| R1 |
2.6 |
0.14 |
0.102 |
0.006 |
| R2 |
3.4 |
0.134 |
| R3 |
4.2 |
0.165 |
| R4 |
4.9 |
0.15 |
0.193 |
| R5 |
5.7 |
0.224 |
| R5A |
6.4 |
0.16 |
0.252 |
| R6 |
7.2 |
0.283 |
| R6A |
8 |
0.315 |
| R7 |
8.9 |
0.17 |
0.350 |
0.007 |
| R6B |
6 |
0.15 |
2.2 |
0.236 |
0.006 |
0.087 |
| R19B |
25 |
0.25 |
2.4 |
0.984 |
0.010 |
0.094 |
| R20B |
29.1 |
0.29 |
2.55 |
1.146 |
0.011 |
0.100 |
| R8 |
8.9 |
0.17 |
2.7 |
0.1 |
0.350 |
0.007 |
0.106 |
| R9 |
10.5 |
0.18 |
0.413 |
| R10 |
12.1 |
0.19 |
0.476 |
| R11 |
13.6 |
0.535 |
| R12 |
15.1 |
0.2 |
0.594 |
0.008 |
| R13 |
16.9 |
0.21 |
0.665 |
| R14 |
18.4 |
0.22 |
0.724 |
0.009 |
| R20T |
27.3 |
0.28 |
1.075 |
0.011 |
| R15 |
18.3 |
0.22 |
3.6 |
0.13 |
0.720 |
0.009 |
0.142 |
0.005 |
| R16 |
19.8 |
0.780 |
| R17 |
21.3 |
0.24 |
0.839 |
| R18 |
23 |
0.906 |
| R19 |
24.6 |
0.25 |
0.969 |
0.010 |
| R20 |
26.2 |
0.26 |
1.031 |
| R21 |
27.8 |
0.28 |
1.094 |
0.011 |
| R22 |
29.3 |
0.29 |
1.154 |
| R23 |
30.8 |
0.31 |
1.213 |
0.012 |
| R24 |
32.5 |
0.32 |
1.280 |
0.013 |
| R25 |
34.1 |
0.33 |
1.343 |
| R26 |
35.6 |
0.35 |
1.402 |
0.014 |
| R27 |
37.3 |
0.36 |
1.469 |
| R29T |
43.4 |
0.41 |
1.709 |
0.016 |
| R29B |
41.4 |
0.4 |
5.3 |
1.630 |
0.209 |
| R33B |
54.4 |
0.5 |
2.142 |
0.020 |
| R28 |
37.47 |
0.38 |
5.33 |
0.15 |
1.475 |
0.015 |
0.210 |
0.006 |
| R29 |
40.64 |
0.39 |
1.600 |
| R30 |
43.82 |
0.42 |
1.725 |
0.017 |
| R31 |
46.99 |
0.44 |
1.850 |
| R32 |
50.17 |
0.47 |
1.975 |
0.019 |
| R33 |
53.34 |
0.5 |
2.100 |
0.020 |
| R34 |
56.52 |
0.52 |
2.225 |
| R35 |
59.69 |
0.54 |
2.350 |
0.021 |
| R36 |
62.87 |
0.56 |
2.475 |
0.022 |
| R37 |
66.04 |
0.59 |
2.600 |
0.023 |
| R38 |
69.22 |
0.63 |
2.725 |
0.025 |
| R39 |
72.39 |
0.64 |
2.850 |
| R40 |
75.57 |
0.67 |
2.975 |
0.026 |
| R41 |
78.74 |
0.69 |
3.100 |
0.027 |
| R42 |
81.92 |
0.71 |
3.225 |
0.028 |
| R43 |
85.09 |
0.75 |
3.350 |
0.030 |
| R44 |
88.27 |
0.77 |
3.475 |
| R45 |
91.44 |
0.79 |
3.600 |
0.031 |
| R46 |
94.62 |
0.81 |
3.725 |
0.032 |
| R47 |
97.79 |
0.84 |
3.850 |
0.033 |
| R48 |
100.97 |
0.87 |
3.975 |
0.034 |
| R49 |
104.14 |
0.89 |
4.100 |
0.035 |
| R50 |
107.32 |
0.91 |
4.225 |
0.036 |
| R51 |
110.49 |
0.93 |
4.350 |
0.037 |
| R52 |
113.67 |
0.95 |
4.475 |
| R53 |
6.99 |
0.275 |
| R54 |
116.84 |
0.97 |
4.600 |
0.038 |
| R55 |
120.02 |
1 |
4.725 |
0.039 |
| R56 |
123.19 |
1.03 |
4.850 |
0.041 |
| R57 |
126.37 |
1.05 |
4.975 |
| R58 |
129.54 |
1.08 |
5.100 |
0.043 |
| R59 |
132.72 |
1.1 |
5.225 |
| R60 |
135.89 |
5.350 |
| R61 |
139.07 |
1.13 |
5.475 |
0.044 |
| R62 |
142.24 |
1.17 |
5.600 |
0.046 |
| R63 |
145.42 |
1.2 |
5.725 |
0.047 |
| R64 |
148.59 |
5.850 |
| R65 |
151.77 |
1.24 |
5.975 |
0.049 |
| R66 |
158.12 |
1.27 |
6.225 |
0.050 |
| R67 |
164.47 |
1.31 |
6.475 |
0.052 |
| R68 |
170.82 |
1.38 |
6.725 |
0.054 |
| R69 |
177.17 |
1.41 |
6.975 |
0.056 |
| R70 |
183.52 |
1.44 |
7.225 |
0.057 |
| R71 |
189.87 |
1.48 |
7.475 |
0.058 |
| R72 |
196.22 |
1.55 |
7.725 |
0.061 |
| R73 |
202.57 |
1.59 |
7.975 |
0.063 |
| R74 |
215.27 |
1.67 |
8.475 |
0.066 |
| R75 |
227.97 |
1.75 |
8.975 |
0.069 |
| R76 |
240.67 |
1.83 |
9.475 |
0.072 |
| R77 |
253.37 |
1.93 |
9.975 |
0.076 |
| R78 |
266.07 |
2.02 |
10.475 |
0.080 |
| R79 |
278.77 |
2.08 |
10.975 |
0.082 |
| R80 |
291.47 |
2.21 |
11.475 |
0.087 |
| R81 |
304.17 |
2.25 |
11.975 |
0.089 |
| R82 |
316.87 |
2.37 |
12.475 |
0.093 |
| R83 |
329.57 |
2.43 |
12.975 |
0.096 |
| R84 |
342.27 |
2.49 |
13.475 |
0.098 |
| R85 |
354.97 |
2.56 |
13.975 |
0.101 |
| R86 |
367.67 |
2.68 |
14.475 |
0.106 |
| R87 |
380.37 |
2.76 |
14.975 |
0.109 |
| R88 |
393.07 |
2.84 |
15.475 |
0.112 |