Standard AS568 Size O-Rings
Apple Rubber follows the SAE AS568 Aerospace Standard, which lists the Inside Diameter (ID), Cross-Section (CS), Tolerances, and Dash Numbers for O-rings. These sizes can be found in the AS568 Aerospace Standard. Our brochure is representative of those sizes shown below.
Tolerancing Guideline for Non-Standard O-Rings
Apple Rubber Guide A_0012_EN, “Tolerancing Guideline for Non-Standard O-rings,” provides dimensional inspection criteria for all non-AS568 O-ring sizes, and metric values. This guide does not apply to splice and vulcanized extruded cord-manufactured O-rings.
O-Ring Cross Section
Standard
| Range |
Tolerance |
| 0.000 |
to |
0.110 |
± 0.003 |
| 0.111 |
to |
0.174 |
± 0.004 |
| 0.175 |
to |
0.242 |
± 0.005 |
| 0.243 |
to |
0.300 |
± 0.006 |
| 0.301 |
to |
0.500 |
± 0.007 |
| 0.501 |
to |
0.700 |
± 0.008 |
| 0.701 |
to |
0.900 |
± 0.009 |
| 0.901 |
to |
over |
± 0.010 |
Metric
| Range |
Tolerance |
| 0.00 |
to |
2.79 |
± 0.08 |
| 2.80 |
to |
4.42 |
± 0.10 |
| 4.43 |
to |
6.15 |
± 0.13 |
| 6.16 |
to |
7.62 |
± 0.15 |
| 7.63 |
to |
12.70 |
± 0.18 |
| 12.71 |
to |
17.78 |
± 0.20 |
| 17.79 |
to |
22.86 |
± 0.23 |
| 22.87 |
to |
over |
± 0.25 |
Inside Diameter
Standard
| Range |
Tolerance |
| 0.000 |
to |
0.056 |
± 0.004 |
| 0.057 |
to |
0.550 |
± 0.005 |
| 0.551 |
to |
0.605 |
± 0.007 |
| 0.606 |
to |
0.800 |
± 0.009 |
| 0.801 |
to |
1.090 |
± 0.010 |
| 1.091 |
to |
1.350 |
± 0.012 |
| 1.351 |
to |
1.450 |
± 0.013 |
| 1.451 |
to |
1.750 |
± 0.015 |
| 1.751 |
to |
2.200 |
± 0.018 |
| 2.201 |
to |
2.620 |
± 0.020 |
| 2.621 |
to |
3.575 |
± 0.024 |
| 3.576 |
to |
4.150 |
± 0.028 |
| 4.151 |
to |
4.850 |
± 0.030 |
| 4.851 |
to |
6.100 |
± 0.037 |
| 6.101 |
to |
7.100 |
± 0.040 |
| 7.101 |
to |
8.100 |
± 0.045 |
| 8.101 |
to |
9.100 |
± 0.050 |
| 9.101 |
to |
9.975 |
± 0.055 |
| 9.976 |
to |
11.200 |
± 0.060 |
| 11.201 |
to |
13.000 |
± 0.065 |
| 13.001 |
to |
15.500 |
± 0.070 |
| 15.501 |
to |
16.900 |
± 0.075 |
| 16.901 |
to |
17.900 |
± 0.080 |
| 17.901 |
to |
18.900 |
± 0.085 |
| 18.901 |
to |
19.900 |
± 0.090 |
| 19.901 |
to |
20.900 |
± 0.095 |
| 20.901 |
to |
22.900 |
± 0.100 |
| 22.901 |
to |
23.900 |
± 0.105 |
| 23.901 |
to |
24.900 |
± 0.110 |
| 24.901 |
to |
25.900 |
± 0.115 |
| 25.901 |
to |
26.900 |
± 0.120 |
| 26.901 |
to |
28.500 |
± 0.130 |
| 28.501 |
to |
30.000 |
± 0.140 |
| 30.000 |
and |
over |
± 0.180 |
Metric
| Range |
Tolerance |
| 0.00 |
to |
1.42 |
± 0.10 |
| 1.43 |
to |
13.97 |
± 0.13 |
| 13.98 |
to |
15.36 |
± 0.18 |
| 15.37 |
to |
20.32 |
± 0.23 |
| 20.33 |
to |
27.69 |
± 0.25 |
| 27.70 |
to |
34.29 |
± 0.31 |
| 34.30 |
to |
36.83 |
± 0.33 |
| 36.84 |
to |
45.45 |
± 0.38 |
| 45.46 |
to |
55.88 |
± 0.46 |
| 55.89 |
to |
66.59 |
± 0.51 |
| 66.60 |
to |
90.80 |
± 0.61 |
| 90.81 |
to |
105.41 |
± 0.71 |
| 105.42 |
to |
123.19 |
± 0.76 |
| 123.20 |
to |
154.94 |
± 0.94 |
| 154.95 |
to |
180.34 |
± 1.01 |
| 180.35 |
to |
205.74 |
± 1.14 |
| 205.75 |
to |
231.14 |
± 1.27 |
| 231.15 |
to |
253.37 |
± 1.40 |
| 253.38 |
to |
284.48 |
± 1.52 |
| 284.49 |
to |
330.20 |
± 1.65 |
| 330.21 |
to |
393.70 |
± 1.78 |
| 393.71 |
to |
429.26 |
± 1.91 |
| 429.27 |
to |
454.66 |
± 2.03 |
| 454.67 |
to |
480.06 |
± 2.16 |
| 480.07 |
to |
505.46 |
± 2.29 |
| 505.47 |
to |
530.86 |
± 2.41 |
| 530.87 |
to |
581.66 |
± 2.54 |
| 581.67 |
to |
607.06 |
± 2.67 |
| 607.07 |
to |
632.46 |
± 2.79 |
| 632.47 |
to |
657.86 |
± 2.92 |
| 657.87 |
to |
683.26 |
± 3.05 |
| 683.27 |
to |
723.90 |
± 3.30 |
| 723.91 |
to |
762.00 |
± 3.56 |
| 762.01 |
to |
over |
± 4.57 |