| O-Rings (page 2.4 of 4) |  |
| O-Rings (page 2.4 of 4) | |
AEROSPACE STANDARD 568 DASH NUMBERS
(-001 thru -050) (-102 thru -150) (-151 thru -219) (-220 thru -269)
(-270 thru -341) (-342 thru -391) (-392 thru -475)
| (A) = Size Reference (B) = Volume Cubic Inches (C) = Volume Cubic Centimeters | |||||||||
| Nominal Size Inches | Actual Size Inches | Actual Size Millimeters | |||||||
| (A) | I.D. | O.D. | W | I.D. | W | (B) | I.D. | W | (C) |
| -220 | 1-3/8 | 1-5/8 | 1/8 | 1.359 + .012 | .139 + .004 | .0714 | 34.52 + 0.30 | 3.53 + 0.10 | 1.170 |
| -221 | 1-7/16 | 1-11/16 | 1/8 | 1.421 + .012 | .139 + .004 | .0744 | 36.10 + 0.30 | 3.53 + 0.10 | 1.219 |
| -222 | 1-1/2 | 1-3/4 | 1/8 | 1.484 + .015 | .139 + .004 | .0774 | 37.70 + 0.38 | 3.53 + 0.10 | 1.268 |
| -223 | 1-5/8 | 1-7/8 | 1/8 | 1.609 + .015 | .139 + .004 | .0833 | 40.87 + 0.38 | 3.53 + 0.10 | 1.365 |
| -224 | 1-3/4 | 2 | 1/8 | 1.734 + .015 | .139 + .004 | .0893 | 44.05 + 0.38 | 3.53 + 0.10 | 1.463 |
| -225 | 1-7/8 | 2-1/8 | 1/8 | 1.859 + .018 | .139 + .004 | .0952 | 47.22 + 0.46 | 3.53 + 0.10 | 1.560 |
| -226 | 2 | 2-1/4 | 1/8 | 1.984 + .018 | .139 + .004 | .1012 | 50.40 + 0.46 | 3.53 + 0.10 | 1.658 |
| -227 | 2-1/8 | 2-3/8 | 1/8 | 2.109 + .018 | .139 + .004 | .1072 | 53.57 + 0.46 | 3.53 + 0.10 | 1.757 |
| -228 | 2-1/4 | 2-1/2 | 1/8 | 2.234 + .020 | .139 + .004 | .1130 | 56.75 + 0.50 | 3.53 + 0.10 | 1.853 |
| -229 | 2-3/8 | 2-5/8 | 1/8 | 2.359 + .020 | .139 + .004 | .1191 | 59.92 + 0.50 | 3.53 + 0.10 | 1.952 |
| -230 | 2-1/2 | 2-3/4 | 1/8 | 2.484 + .020 | .139 + .004 | .1250 | 63.10 + 0.50 | 3.53 + 0.10 | 2.048 |
| -231 | 2-5/8 | 2-7/8 | 1/8 | 2.609 + .020 | .139 + .004 | .1310 | 66.27 + 0.50 | 3.53 + 0.10 | 2.147 |
| -232 | 2-3/4 | 3 | 1/8 | 2.734 + .024 | .139 + .004 | .1370 | 69.44 + 0.61 | 3.53 + 0.10 | 2.245 |
| -233 | 2-7/8 | 3-1/8 | 1/8 | 2.850 + .024 | .139 + .004 | .1429 | 72.62 + 0.61 | 3.53 + 0.10 | 2.342 |
| -234 | 3 | 3-3/4 | 1/8 | 2.984 + .024 | .139 + .004 | .1489 | 75.79 + 0.61 | 3.53 + 0.10 | 2.440 |
| -235 | 3-1/8 | 3-3/8 | 1/8 | 3.109 + .024 | .139 + .004 | .1548 | 78.97 + 0.61 | 3.53 + 0.10 | 2.537 |
| -236 | 3-1/4 | 3-1/2 | 1/8 | 3.234 + .024 | .139 + .004 | .1608 | 82.14 + 0.61 | 3.53 + 0.10 | 2.635 |
| -237 | 3-3/8 | 3-5/8 | 1/8 | 3.359 + .024 | .139 + .004 | .1668 | 85.32 + 0.61 | 3.53 + 0.10 | 2.733 |
| -238 | 3-1/2 | 3-3/4 | 1/8 | 3.484 + .024 | .139 + .004 | .1727 | 88.49 + 0.61 | 3.53 + 0.10 | 2.830 |
| -239 | 3-5/8 | 3-7/8 | 1/8 | 3.609 + .028 | .139 + .004 | .1787 | 91.67 + 0.71 | 3.53 + 0.10 | 2.928 |
| -240 | 3-3/4 | 4 | 1/8 | 3.734 + .028 | .139 + .004 | .1846 | 94.84 + 0.71 | 3.53 + 0.10 | 3.025 |
| -241 | 3-7/8 | 4-1/8 | 1/8 | 3.859 + .028 | .139 + .004 | .1906 | 98.02 + 0.71 | 3.53 + 0.10 | 3.123 |
| -242 | 4 | 4-1/4 | 1/8 | 3.984 + .028 | .139 + .004 | .1966 | 101.19 + 0.71 | 3.53 + 0.10 | 3.222 |
| -243 | 4-1/8 | 4-3/8 | 1/8 | 4.109 + .028 | .139 + .004 | .2025 | 104.37 + 0.71 | 3.53 + 0.10 | 3.318 |
| -244 | 4-1/4 | 4-1/2 | 1/8 | 4.234 + .030 | .139 + .004 | .2085 | 107.54 + 0.76 | 3.53 + 0.10 | 3.417 |
| -245 | 4-3/8 | 4-5/8 | 1/8 | 4.359 + .030 | .139 + .004 | .2144 | 110.72 + 0.76 | 3.53 + 0.10 | 3.513 |
| -246 | 4-1/2 | 4-3/4 | 1/8 | 4.484 + .030 | .139 + .004 | .2204 | 113.89 + 0.76 | 3.53 + 0.10 | 3.612 |
| -247 | 4-5/8 | 4-7/8 | 1/8 | 4.609 + .030 | .139 + .004 | .2263 | 117.07 + 0.76 | 3.53 + 0.10 | 3.708 |
| -248 | 4-3/4 | 5 | 1/8 | 4.734 + .030 | .139 + .004 | .2323 | 120.24 + 0.76 | 3.53 + 0.10 | 3.807 |
| -249 | 4-7/8 | 5/18 | 1/8 | 4.859 + .035 | .139 + .004 | .2383 | 123.42 + 0.89 | 3.53 + 0.10 | 3.905 |
| -250 | 5 | 5-1/4 | 1/8 | 4.984 + .035 | .139 + .004 | .2442 | 126.59 + 0.89 | 3.53 + 0.10 | 4.002 |
| -251 | 5-1/8 | 5-3/8 | 1/8 | 5.109 + .035 | .139 + .004 | .2503 | 129.77 + 0.89 | 3.53 + 0.10 | 4.100 |
| -253 | 5-1/4 | 5-1/2 | 1/8 | 5.234 + .035 | .139 + .004 | .2561 | 132.94 + 0.89 | 3.53 + 0.10 | 4.197 |
| -253 | 5-3/8 | 5-5/8 | 1/8 | 5.359 + .035 | .139 + .004 | .2621 | 136.12 + 0.89 | 3.53 + 0.10 | 4.295 |
| -254 | 5-1/2 | 5-3/4 | 1/8 | 5.484 + .035 | .139 + .004 | .2681 | 139.30 + 0.89 | 3.53 + 0.10 | 4.393 |
| -255 | 5-5/8 | 5-7/8 | 1/8 | 5.609 + .035 | .139 + .004 | .2740 | 142.47 + 0.89 | 3.53 + 0.10 | 4.490 |
| -256 | 5-3/4 | 6 | 1/8 | 5.734 + .035 | .139 + .004 | .2800 | 145.65 + 0.89 | 3.53 + 0.10 | 4.588 |
| -257 | 5-7/8 | 6-1/8 | 1/8 | 5.859 + .035 | .139 + .004 | .2859 | 148.82 + 0.89 | 3.53 + 0.10 | 4.685 |
| -258 | 6 | 6-1/4 | 1/8 | 5.984 + .035 | .139 + .004 | .2919 | 152.00 + 0.89 | 3.53 + 0.10 | 4.783 |
| -259 | 6-1/4 | 6-1/2 | 1/8 | 6.234 + .040 | .139 + .004 | .3038 | 158.36 + 1.02 | 3.53 + 0.10 | 4.978 |
| -260 | 6-1/2 | 6-3/4 | 1/8 | 6.484 + .040 | .139 + .004 | .3157 | 164.70 + 1.02 | 3.53 + 0.10 | 5.173 |
| -261 | 6-3/4 | 7 | 1/8 | 6.734 + .040 | .139 + .004 | .3277 | 171.05 + 1.02 | 3.53 + 0.10 | 5.370 |
| -262 | 7 | 7-1/4 | 1/8 | 6.984 + .040 | .139 + .004 | .3396 | 177.40 + 1.02 | 3.53 + 0.10 | 5.565 |
| -263 | 7-1/4 | 7-1/2 | 1/8 | 7.234 + .045 | .139 + .004 | .3515 | 183.75 + 1.14 | 3.53 + 0.10 | 5.760 |
| -264 | 7-1/2 | 7-3/4 | 1/8 | 7.484 + .045 | .139 + .004 | .3634 | 190.10 + 1.14 | 3.53 + 0.10 | 5.955 |
| -265 | 7-3/4 | 8 | 1/8 | 7.734 + .045 | .139 + .004 | .3753 | 196.45 + 1.14 | 3.53 + 0.10 | 6.150 |
| -266 | 8 | 8-1/4 | 1/8 | 7.984 + .045 | .139 + .004 | .3872 | 202.80 + 1.02 | 3.53 + 0.10 | 6.345 |
| -267 | 8-1/4 | 8-1/2 | 1/8 | 8.234 + .050 | .139 + .004 | .3992 | 209.15 + 1.25 | 3.53 + 0.10 | 6.542 |
| -268 | 8-1/2 | 8-3/4 | 1/8 | 8.484 + .050 | .139 + .004 | .4111 | 215.50 + 1.25 | 3.53 + 0.10 | 6.737 |
| -269 | 8-3/4 | 9 | 1/8 | 8.734 + .050 | .139 + .004 | .4230 | 221.85 + 1.25 | 3.53 + 0.10 | 6.932 |
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