O-Rings

O-Rings

Additional Information
There are several different standards to choose from when it comes to O-ring dimensions.  The most popular in the United States is the AS568 standard for O-ring sizes and tolerances.  Maintained by the Society of Automotive Engineers, this standard allows the user to choose from five different cross-sections with inside diameters ranging from 1/32" to 26". Tube fitting boss seals are included in AS568 as 900 series O-ring sizes, and are intended for use in MS33649 (now superseded by SAE-AS5202) straight thread tube fitings. 

RT/Dygert also offers a wide array of metric sizes, in both standard and non-standard dimensions.  As a subset of the metric sizes offered, we also stock many Japanese Industrial Standard (JIS B2401) sizes. If an O-ring with special size or fluid resistance is required, RT/Dygert can provide custom O-rings, specially made to your demanding requirements.
SIZES
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Fit Groove Size
O.D.
AS568A
Dash No.
C/S
I.D.
Metric
Dimensions in Inches Nominal Size (Reference Only)
ID AS568A I.D. ± C/S Vol (in3) I.D. O.D. C/S
1236 102 0.049 .005 .103 ± .003 .0040 1/16 1/4 3/32
1237 103 0.081 .005 .103 ± .003 .0048 3/32 9/32 3/32
1238 104 0.112 .005 .103 ± .003 .0056 1/8 5/16 3/32
1239 105 0.143 .005 .103 ± .003 .0064 5/32 11/32 3/32
1240 106 0.174 .005 .103 ± .003 .0072 3/16 3/8 3/32
1241 107 0.206 .005 .103 ± .003 .0080 7/32 13/32 3/32
1242 108 0.237 .005 .103 ± .003 .0088 1/4 7/16 3/32
1243 109 0.299 .005 .103 ± .003 .0105 5/16 1/2 3/32
1244 110 0.362 .005 .103 ± .003 .0122 3/8 9/16 3/32
1245 111 0.424 .005 .103 ± .003 .0138 7/16 5/8 3/32
1246 112 0.487 .005 .103 ± .003 .0154 1/2 11/16 3/32
1247 113 0.549 .007 .103 ± .003 .0171 9/16 3/4 3/32
1248 114 0.612 .009 .103 ± .003 .0187 5/8 13/16 3/32
1249 115 0.674 .009 .103 ± .003 .0203 11/16 7/8 3/32
1250 116 0.737 .009 .103 ± .003 .0220 3/4 15/16 3/32
1251 117 0.799 .010 .103 ± .003 .0236 13/16 1 3/32
1252 118 0.862 .010 .103 ± .003 .0253 7/8 1-1/16 3/32
1253 119 0.924 .010 .103 ± .003 .0269 15/16 1-1/8 3/32
1254 120 0.987 .010 .103 ± .003 .0285 1 1-3/16 3/32
1255 121 1.049 .010 .103 ± .003 .0302 1-1/16 1-1/4 3/32
1256 122 1.112 .010 .103 ± .003 .0318 1-1/8 1-5/16 3/32
1257 123 1.174 .012 .103 ± .003 .0334 1-3/16 1-3/8 3/32
1258 124 1.237 .012 .103 ± .003 .0351 1-1/4 1-7/16 3/32
1259 125 1.299 .012 .103 ± .003 .0367 1-5/16 1-1/2 3/32
1260 126 1.362 .012 .103 ± .003 .0383 1-3/8 1-9/16 3/32
1261 127 1.424 .012 .103 ± .003 .0400 1-7/16 1-5/8 3/32
1262 128 1.487 .012 .103 ± .003 .0416 1-1/2 1-11/16 3/32
1263 129 1.549 .015 .103 ± .003 .0432 1-9/16 1-3/4 3/32
1264 130 1.612 .015 .103 ± .003 .0449 1-5/8 1-13/16 3/32
1265 131 1.674 .015 .103 ± .003 .0465 1-11/16 1-7/8 3/32
1266 132 1.737 .015 .103 ± .003 .0482 1-3/4 1-15/16 3/32
1267 133 1.799 .015 .103 ± .003 .0498 1-13/16 2 3/32
1268 134 1.862 .015 .103 ± .003 .0514 1-7/8 2-1/16 3/32
1269 135 1.925 .017 .103 ± .003 .0531 1-15/16 2-1/8 3/32
1270 136 1.987 .017 .103 ± .003 .0547 2 2-3/16 3/32
1271 137 2.05 .017 .103 ± .003 .0564 2-1/16 2-1/4 3/32
1272 138 2.112 .017 .103 ± .003 .0580 2-1/8 2-5/16 3/32
1273 139 2.175 .017 .103 ± .003 .0596 2-3/16 2-3/8 3/32
1274 140 2.237 .017 .103 ± .003 .0612 2-1/4 2-7/16 3/32
1275 141 2.3 .020 .103 ± .003 .0629 2-5/16 2-1/2 3/32
1276 142 2.362 .020 .103 ± .003 .0645 2-3/8 2-9/16 3/32
1277 143 2.425 .020 .103 ± .003 .0662 2-7/16 2-5/8 3/32
1278 144 2.487 .020 .103 ± .003 .0678 2-1/2 2-11/16 3/32
1279 145 2.55 .020 .103 ± .003 .0694 2-9/16 2-3/4 3/32
1280 146 2.612 .020 .103 ± .003 .0711 2-5/8 2-13/16 3/32
1281 147 2.675 .022 .103 ± .003 .0727 2-11/16 2-7/8 3/32
1282 148 2.737 .022 .103 ± .003 .0743 2-3/4 2-15/16 3/32
1283 149 2.8 .022 .103 ± .003 .0760 2-13/16 3 3/32
1284 150 2.862 .022 .103 ± .003 .0776 2-7/8 3-1/16 3/32
1285 151 2.987 .024 .103 ± .003 .0809 3 3-3/16 3/32
1286 152 3.237 .024 .103 ± .003 .0874 3-1/4 3-7/16 3/32
1287 153 3.487 .024 .103 ± .003 .0940 3-1/2 3-11/16 3/32
1288 154 3.737 .028 .103 ± .003 .1005 3-3/4 3-15/16 3/32
1289 155 3.987 .028 .103 ± .003 .1071 4 4-3/16 3/32
1290 156 4.237 .030 .103 ± .003 .1136 4-1/4 4-7/16 3/32
1291 157 4.487 .030 .103 ± .003 .1202 4-1/2 4-11/16 3/32
1292 158 4.737 .030 .103 ± .003 .1267 4-3/4 4-15/16 3/32
1293 159 4.987 .035 .103 ± .003 .1332 5 5-3/16 3/32
1294 160 5.237 .035 .103 ± .003 .1398 5-1/4 5-7/16 3/32
1295 161 5.487 .035 .103 ± .003 .1463 5-1/2 5-11/16 3/32
1296 162 5.737 .035 .103 ± .003 .1529 5-3/4 5-15/16 3/32
1297 163 5.987 .035 .103 ± .003 .1594 6 6-3/16 3/32
1298 164 6.237 .040 .103 ± .003 .1660 6-1/4 6-7/16 3/32
1299 165 6.487 .040 .103 ± .003 .1726 6-1/2 6-11/16 3/32
1300 166 6.737 .040 .103 ± .003 .1791 6-3/4 6-15/16 3/32
1301 167 6.987 .040 .103 ± .003 .1856 7 7-3/16 3/32
1302 168 7.237 .045 .103 ± .003 .1921 7-1/4 7-7/16 3/32
1303 169 7.487 .045 .103 ± .003 .1986 7-1/2 7-11/16 3/32
1304 170 7.737 .045 .103 ± .003 .2052 7-3/4 7-15/16 3/32
1305 171 7.987 .045 .103 ± .003 .2117 8 8-3/16 3/32
1306 172 8.237 .050 .103 ± .003 .2182 8-1/4 8-7/16 3/32
1307 173 8.487 .050 .103 ± .003 .2247 8-1/2 8-11/16 3/32
1308 174 8.737 .050 .103 ± .003 .2313 8-3/4 8-15/16 3/32
1309 175 8.897 .050 .103 ± .003 .2378 9 9-3/16 3/32
1310 176 9.237 .055 .103 ± .003 .2443 9-1/4 9-7/16 3/32
1311 177 9.487 .055 .103 ± .003 .2508 9-1/2 9-11/16 3/32
1312 178 9.737 .055 .103 ± .003 .2574 9-3/4 9-15/16 3/32
MATERIALS
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