Gregory Bender

AS 568 A O-ring standard specifications (inch)

I learned much of this information from the Frederick Seal, American Seal and Packing, and Precision Associates websites.

About the AS 568 A standard for O-rings

The AS 568 A standard for O-rings is produced by the Society of Automotive Engineers AS (Aerospace Standard). The AS 568 A specification describes 369 O-rings. Each size is designated with a dash number and can be described using two values: the inside diameter and diameter of the cross-section. Except for the -9## O-rings, all American inch O-rings can be categorized into seven cross-sections and 119 inside diameters.

The nominal size for any given American inch o-ring, however, is different than the actual physical dimension of the o-ring. As an example, consider the -001 o-ring. Nominally, it is described as having a cross-section of 132 inch. The decimal equivalent of 132 inch is 0.03125 inch. However, the actual cross-section is 0.04 inch. Why the discrepancy? The nominal sizing of the American inch system is meant to describe the size of the groove in which the O-ring resides. Since all O-rings must be squeezed by about 10% to 15% in order to seal properly, the extra size of the O-ring handles the needed squeeze.

O-rings with a nominal cross-section of 132 inch (-001)

Size reference code (dash number)Nominal size in inchesDecimal size in inchesDecimal size in millimeters
IDODCross-sectionIDCross-sectionIDCross-section
-001132332132.029 ± 0.004.040 ± 0.0030.74 ± 0.101.02 ± 0.08

O-rings with a nominal cross-section of 364 inch (-002)

Size reference code (dash number)Nominal size in inchesDecimal size in inchesDecimal size in millimeters
IDODCross-sectionIDCross-sectionIDCross-section
-002364964364.042 ± 0.004.050 ± 0.0031.07 ± 0.101.27 ± 0.08

O-rings with a nominal cross-section of 116 inch (-0##)

Size reference code (dash number)Nominal size in inchesDecimal size in inchesDecimal size in millimeters
IDODCross-sectionIDCross-sectionIDCross-section
-003116316116.056 ± 0.004.060 ± 0.0031.42 ± 0.101.52 ± 0.08
-0045641364116.070 ± 0.005.070 ± 0.0031.78 ± 0.131.78 ± 0.08
-005332732116.101 ± 0.005.070 ± 0.0032.57 ± 0.131.78 ± 0.08
-0061814116.114 ± 0.005.070 ± 0.0032.90 ± 0.131.78 ± 0.08
-007532932116.145 ± 0.005.070 ± 0.0033.68 ± 0.131.78 ± 0.08
-008316516116.176 ± 0.005.070 ± 0.0034.47 ± 0.131.78 ± 0.08
-0097321132116.208 ± 0.005.070 ± 0.0035.28 ± 0.131.78 ± 0.08
-0101438116.239 ± 0.005.070 ± 0.0036.07 ± 0.131.78 ± 0.08
-011516716116.301 ± 0.005.070 ± 0.0037.65 ± 0.131.78 ± 0.08
-0123812116.364 ± 0.005.070 ± 0.0039.25 ± 0.131.78 ± 0.08
-013716916116.426 ± 0.005.070 ± 0.00310.82 ± 0.131.78 ± 0.08
-0141258116.489 ± 0.005.070 ± 0.00312.42 ± 0.131.78 ± 0.08
-0159161116116.551 ± 0.007.070 ± 0.00314.00 ± 0.181.78 ± 0.08
-0165834116.614 ± 0.009.070 ± 0.00315.60 ± 0.231.78 ± 0.08
-01711161316116.676 ± 0.009.070 ± 0.00317.17 ± 0.231.78 ± 0.08
-0183478116.739 ± 0.009.070 ± 0.00318.77 ± 0.231.78 ± 0.08
-01913161516116.801 ± 0.009.070 ± 0.00320.35 ± 0.231.78 ± 0.08
-020781116.864 ± 0.009.070 ± 0.00321.95 ± 0.231.78 ± 0.08
-02115161 116116.926 ± 0.009.070 ± 0.00323.52 ± 0.231.78 ± 0.08
-02211 18116.989 ± 0.010.070 ± 0.00325.12 ± 0.251.78 ± 0.08
-0231 1161 3161161.051 ± 0.010.070 ± 0.00326.70 ± 0.251.78 ± 0.08
-0241 181 141161.114 ± 0.010.070 ± 0.00328.30 ± 0.251.78 ± 0.08
-0251 3161 5161161.176 ± 0.011.070 ± 0.00329.87 ± 0.281.78 ± 0.08
-0261 141 381161.239 ± 0.011.070 ± 0.00331.47 ± 0.281.78 ± 0.08
-0271 5161 7161161.301 ± 0.011.070 ± 0.00333.05 ± 0.281.78 ± 0.08
-0281 381 121161.364 ± 0.013.070 ± 0.00334.65 ± 0.331.78 ± 0.08
-0291 121 581161.489 ± 0.013.070 ± 0.00337.82 ± 0.331.78 ± 0.08
-0301 581 341161.614 ± 0.013.070 ± 0.00341.00 ± 0.331.78 ± 0.08
-0311 341 781161.739 ± 0.015.070 ± 0.00344.17 ± 0.381.78 ± 0.08
-0321 7821161.864 ± 0.015.070 ± 0.00347.35 ± 0.381.78 ± 0.08
-03322 181161.989 ± 0.018.070 ± 0.00350.52 ± 0.461.78 ± 0.08
-0342 182 141162.114 ± 0.018.070 ± 0.00353.70 ± 0.461.78 ± 0.08
-0352 142 381162.239 ± 0.018.070 ± 0.00356.87 ± 0.461.78 ± 0.08
-0362 382 121162.364 ± 0.018.070 ± 0.00360.05 ± 0.461.78 ± 0.08
-0372 122 581162.489 ± 0.018.070 ± 0.00363.22 ± 0.461.78 ± 0.08
-0382 582 341162.614 ± 0.020.070 ± 0.00366.40 ± 0.511.78 ± 0.08
-0392 342 781162.739 ± 0.020.070 ± 0.00369.57 ± 0.511.78 ± 0.08
-0402 7831162.864 ± 0.020.070 ± 0.00372.75 ± 0.511.78 ± 0.08
-04133 181162.989 ± 0.024.070 ± 0.00375.92 ± 0.611.78 ± 0.08
-0423 143 381163.239 ± 0.024.070 ± 0.00382.27 ± 0.611.78 ± 0.08
-0433 123 581163.489 ± 0.024.070 ± 0.00388.62 ± 0.611.78 ± 0.08
-0443 343 781163.739 ± 0.027.070 ± 0.00394.97 ± 0.691.78 ± 0.08
-04544 181163.989 ± 0.027.070 ± 0.003101.32 ± 0.691.78 ± 0.08
-0464 144 381164.239 ± 0.030.070 ± 0.003107.67 ± 0.761.78 ± 0.08
-0474 124 581164.489 ± 0.030.070 ± 0.003114.02 ± 0.761.78 ± 0.08
-0484 344 781164.739 ± 0.030.070 ± 0.003120.37 ± 0.761.78 ± 0.08
-04955 181164.989 ± 0.037.070 ± 0.003126.72 ± 0.941.78 ± 0.08
-0505 145 381165.239 ± 0.037.070 ± 0.003133.07 ± 0.941.78 ± 0.08

O-rings with a nominal cross-section of 332 inch (-1##)

Size reference code (dash number)Nominal size in inchesDecimal size in inchesDecimal size in millimeters
IDODCross-sectionIDCross-sectionIDCross-section
-10211614332.049 ± 0.005.103 ± 0.0031.24 ± 0.132.62 ± 0.08
-103332932332.081 ± 0.005.103 ± 0.0032.06 ± 0.132.62 ± 0.08
-10418516332.112 ± 0.005.103 ± 0.0032.84 ± 0.132.62 ± 0.08
-1055321132332.143 ± 0.005.103 ± 0.0033.63 ± 0.132.62 ± 0.08
-10631638332.174 ± 0.005.103 ± 0.0034.42 ± 0.132.62 ± 0.08
-1077321332332.206 ± 0.005.103 ± 0.0035.23 ± 0.132.62 ± 0.08
-10814716332.237 ± 0.005.103 ± 0.0036.02 ± 0.132.62 ± 0.08
-10951612332.299 ± 0.005.103 ± 0.0037.59 ± 0.132.62 ± 0.08
-11038916332.362 ± 0.005.103 ± 0.0039.19 ± 0.132.62 ± 0.08
-11171658332.424 ± 0.005.103 ± 0.00310.77 ± 0.132.62 ± 0.08
-112121116332.487 ± 0.005.103 ± 0.00312.37 ± 0.132.62 ± 0.08
-11391634332.549 ± 0.007.103 ± 0.00313.94 ± 0.182.62 ± 0.08
-114581316332.612 ± 0.009.103 ± 0.00315.54 ± 0.232.62 ± 0.08
-115111678332.674 ± 0.009.103 ± 0.00317.12 ± 0.232.62 ± 0.08
-116341516332.737 ± 0.009.103 ± 0.00318.72 ± 0.232.62 ± 0.08
-11713161332.799 ± 0.010.103 ± 0.00320.29 ± 0.252.62 ± 0.08
-118781 116332.862 ± 0.010.103 ± 0.00321.89 ± 0.252.62 ± 0.08
-11915161 18332.924 ± 0.010.103 ± 0.00323.47 ± 0.252.62 ± 0.08
-12011 316332.987 ± 0.010.103 ± 0.00325.07 ± 0.252.62 ± 0.08
-1211 1161 143321.049 ± 0.010.103 ± 0.00326.64 ± 0.252.62 ± 0.08
-1221 181 5163321.112 ± 0.010.103 ± 0.00328.24 ± 0.252.62 ± 0.08
-1231 3161 383321.174 ± 0.012.103 ± 0.00329.82 ± 0.302.62 ± 0.08
-1241 141 7163321.237 ± 0.012.103 ± 0.00331.42 ± 0.302.62 ± 0.08
-1251 5161 123321.299 ± 0.012.103 ± 0.00332.99 ± 0.302.62 ± 0.08
-1261 381 9163321.362 ± 0.012.103 ± 0.00334.59 ± 0.302.62 ± 0.08
-1271 7161 583321.424 ± 0.012.103 ± 0.00336.17 ± 0.302.62 ± 0.08
-1281 121 11163321.487 ± 0.012.103 ± 0.00337.77 ± 0.302.62 ± 0.08
-1291 9161 343321.549 ± 0.015.103 ± 0.00339.34 ± 0.382.62 ± 0.08
-1301 581 13163321.612 ± 0.015.103 ± 0.00340.94 ± 0.382.62 ± 0.08
-1311 11161 783321.674 ± 0.015.103 ± 0.00342.52 ± 0.382.62 ± 0.08
-1321 341 15163321.737 ± 0.015.103 ± 0.00344.12 ± 0.382.62 ± 0.08
-1331 131623321.799 ± 0.015.103 ± 0.00345.69 ± 0.382.62 ± 0.08
-1341 782 1163321.862 ± 0.015.103 ± 0.00347.29 ± 0.382.62 ± 0.08
-1351 15162 183321.925 ± 0.017.103 ± 0.00348.90 ± 0.432.62 ± 0.08
-13622 3163321.987 ± 0.017.103 ± 0.00350.47 ± 0.432.62 ± 0.08
-1372 1162 143322.050 ± 0.017.103 ± 0.00352.07 ± 0.432.62 ± 0.08
-1382 182 5163322.112 ± 0.017.103 ± 0.00353.64 ± 0.432.62 ± 0.08
-1392 3162 383322.175 ± 0.017.103 ± 0.00355.25 ± 0.432.62 ± 0.08
-1402 142 7163322.237 ± 0.017.103 ± 0.00356.82 ± 0.432.62 ± 0.08
-1412 5162 123322.300 ± 0.020.103 ± 0.00358.42 ± 0.512.62 ± 0.08
-1422 382 9163322.362 ± 0.020.103 ± 0.00359.99 ± 0.512.62 ± 0.08
-1432 7162 583322.425 ± 0.020.103 ± 0.00361.60 ± 0.512.62 ± 0.08
-1442 122 11163322.487 ± 0.020.103 ± 0.00363.17 ± 0.512.62 ± 0.08
-1452 9162 343322.550 ± 0.020.103 ± 0.00364.77 ± 0.512.62 ± 0.08
-1462 582 13163322.612 ± 0.020.103 ± 0.00366.34 ± 0.512.62 ± 0.08
-1472 11162 783322.675 ± 0.022.103 ± 0.00367.95 ± 0.562.62 ± 0.08
-1482 342 15163322.737 ± 0.022.103 ± 0.00369.52 ± 0.562.62 ± 0.08
-1492 131633322.800 ± 0.022.103 ± 0.00371.12 ± 0.562.62 ± 0.08
-1502 783 1163322.862 ± 0.022.103 ± 0.00372.69 ± 0.562.62 ± 0.08
-15133 3163322.987 ± 0.024.103 ± 0.00375.87 ± 0.612.62 ± 0.08
-1523 143 7163323.237 ± 0.024.103 ± 0.00382.22 ± 0.612.62 ± 0.08
-1533 123 11163323.487 ± 0.024.103 ± 0.00388.57 ± 0.612.62 ± 0.08
-1543 343 15163323.737 ± 0.028.103 ± 0.00394.92 ± 0.712.62 ± 0.08
-15544 3163323.987 ± 0.028.103 ± 0.003101.27 ± 0.712.62 ± 0.08
-1564 144 7163324.237 ± 0.030.103 ± 0.003107.62 ± 0.762.62 ± 0.08
-1574 124 11163324.487 ± 0.030.103 ± 0.003113.97 ± 0.762.62 ± 0.08
-1584 344 15163324.737 ± 0.030.103 ± 0.003120.32 ± 0.762.62 ± 0.08
-15955 3163324.987 ± 0.035.103 ± 0.003126.67 ± 0.892.62 ± 0.08
-1605 145 7163325.237 ± 0.035.103 ± 0.003133.02 ± 0.892.62 ± 0.08
-1615 125 11163325.487 ± 0.035.103 ± 0.003139.37 ± 0.892.62 ± 0.08
-1625 345 15163325.737 ± 0.035.103 ± 0.003145.72 ± 0.892.62 ± 0.08
-16366 3163325.987 ± 0.035.103 ± 0.003152.07 ± 0.892.62 ± 0.08
-1646 146 7163326.237 ± 0.040.103 ± 0.003158.42 ± 1.022.62 ± 0.08
-1656 126 11163326.487 ± 0.040.103 ± 0.003164.77 ± 1.022.62 ± 0.08
-1666 346 15163326.737 ± 0.040.103 ± 0.003171.12 ± 1.022.62 ± 0.08
-16777 3163326.987 ± 0.040.103 ± 0.003177.47 ± 1.022.62 ± 0.08
-1687 147 7163327.237 ± 0.045.103 ± 0.003183.82 ± 1.142.62 ± 0.08
-1697 127 11163327.487 ± 0.045.103 ± 0.003190.17 ± 1.142.62 ± 0.08
-1707 347 15163327.737 ± 0.045.103 ± 0.003196.52 ± 1.142.62 ± 0.08
-17188 3163327.987 ± 0.045.103 ± 0.003202.87 ± 1.142.62 ± 0.08
-1728 148 7163328.237 ± 0.050.103 ± 0.003209.22 ± 1.272.62 ± 0.08
-1738 128 11163328.487 ± 0.050.103 ± 0.003215.57 ± 1.272.62 ± 0.08
-1748 348 15163328.737 ± 0.050.103 ± 0.003221.92 ± 1.272.62 ± 0.08
-17599 3163328.987 ± 0.050.103 ± 0.003228.27 ± 1.272.62 ± 0.08
-1769 149 7163329.237 ± 0.055.103 ± 0.003234.62 ± 1.402.62 ± 0.08
-1779 129 11163329.487 ± 0.055.103 ± 0.003240.97 ± 1.402.62 ± 0.08
-1789 349 15163329.737 ± 0.055.103 ± 0.003247.32 ± 1.402.62 ± 0.08

O-rings with a nominal cross-section of 18 inch (-2##)

Size reference code (dash number)Nominal size in inchesDecimal size in inchesDecimal size in millimeters
IDODCross-sectionIDCross-sectionIDCross-section
-20131671618.171 ± 0.005.139 ± 0.0044.34 ± 0.133.53 ± 0.10
-202141218.234 ± 0.005.139 ± 0.0045.94 ± 0.133.53 ± 0.10
-20351691618.296 ± 0.005.139 ± 0.0047.52 ± 0.133.53 ± 0.10
-204385818.359 ± 0.005.139 ± 0.0049.12 ± 0.133.53 ± 0.10
-205716111618.421 ± 0.005.139 ± 0.00410.69 ± 0.133.53 ± 0.10
-206123418.484 ± 0.005.139 ± 0.00412.29 ± 0.133.53 ± 0.10
-207916131618.546 ± 0.007.139 ± 0.00413.87 ± 0.183.53 ± 0.10
-208587818.609 ± 0.009.139 ± 0.00415.47 ± 0.233.53 ± 0.10
-2091116151618.671 ± 0.009.139 ± 0.00417.04 ± 0.233.53 ± 0.10
-21034118.734 ± 0.010.139 ± 0.00418.64 ± 0.253.53 ± 0.10
-21113161 11618.796 ± 0.010.139 ± 0.00420.22 ± 0.253.53 ± 0.10
-212781 1818.859 ± 0.010.139 ± 0.00421.82 ± 0.253.53 ± 0.10
-21315161 31618.921 ± 0.010.139 ± 0.00423.39 ± 0.253.53 ± 0.10
-21411 1418.984 ± 0.010.139 ± 0.00424.99 ± 0.253.53 ± 0.10
-2151 1161 516181.046 ± 0.010.139 ± 0.00426.57 ± 0.253.53 ± 0.10
-2161 181 38181.109 ± 0.012.139 ± 0.00428.17 ± 0.303.53 ± 0.10
-2171 3161 716181.171 ± 0.012.139 ± 0.00429.74 ± 0.303.53 ± 0.10
-2181 141 12181.234 ± 0.012.139 ± 0.00431.34 ± 0.303.53 ± 0.10
-2191 5161 916181.296 ± 0.012.139 ± 0.00432.92 ± 0.303.53 ± 0.10
-2201 381 58181.359 ± 0.012.139 ± 0.00434.52 ± 0.303.53 ± 0.10
-2211 7161 1116181.421 ± 0.012.139 ± 0.00436.09 ± 0.303.53 ± 0.10
-2221 121 34181.484 ± 0.015.139 ± 0.00437.69 ± 0.383.53 ± 0.10
-2231 581 78181.609 ± 0.015.139 ± 0.00440.87 ± 0.383.53 ± 0.10
-2241 342181.734 ± 0.015.139 ± 0.00444.04 ± 0.383.53 ± 0.10
-2251 782 18181.859 ± 0.018.139 ± 0.00447.22 ± 0.463.53 ± 0.10
-22622 14181.984 ± 0.018.139 ± 0.00450.39 ± 0.463.53 ± 0.10
-2272 182 38182.109 ± 0.018.139 ± 0.00453.57 ± 0.463.53 ± 0.10
-2282 142 12182.234 ± 0.020.139 ± 0.00456.74 ± 0.513.53 ± 0.10
-2292 382 58182.359 ± 0.020.139 ± 0.00459.92 ± 0.513.53 ± 0.10
-2302 122 34182.484 ± 0.020.139 ± 0.00463.09 ± 0.513.53 ± 0.10
-2312 582 78182.609 ± 0.020.139 ± 0.00466.27 ± 0.513.53 ± 0.10
-2322 343182.734 ± 0.024.139 ± 0.00469.44 ± 0.613.53 ± 0.10
-2332 783 18182.859 ± 0.024.139 ± 0.00472.62 ± 0.613.53 ± 0.10
-23433 14182.984 ± 0.024.139 ± 0.00475.79 ± 0.613.53 ± 0.10
-2353 183 38183.109 ± 0.024.139 ± 0.00478.97 ± 0.613.53 ± 0.10
-2363 143 12183.234 ± 0.024.139 ± 0.00482.14 ± 0.613.53 ± 0.10
-2373 383 58183.359 ± 0.024.139 ± 0.00485.32 ± 0.613.53 ± 0.10
-2383 123 34183.484 ± 0.024.139 ± 0.00488.49 ± 0.613.53 ± 0.10
-2393 583 78183.609 ± 0.028.139 ± 0.00491.67 ± 0.713.53 ± 0.10
-2403 344183.734 ± 0.028.139 ± 0.00494.84 ± 0.713.53 ± 0.10
-2413 784 18183.859 ± 0.028.139 ± 0.00498.02 ± 0.713.53 ± 0.10
-24244 14183.984 ± 0.028.139 ± 0.004101.19 ± 0.713.53 ± 0.10
-2434 184 38184.109 ± 0.028.139 ± 0.004104.37 ± 0.713.53 ± 0.10
-2444 144 12184.234 ± 0.030.139 ± 0.004107.54 ± 0.763.53 ± 0.10
-2454 384 58184.359 ± 0.030.139 ± 0.004110.72 ± 0.763.53 ± 0.10
-2464 124 34184.484 ± 0.030.139 ± 0.004113.89 ± 0.763.53 ± 0.10
-2474 584 78184.609 ± 0.030.139 ± 0.004117.07 ± 0.763.53 ± 0.10
-2484 345184.734 ± 0.030.139 ± 0.004120.24 ± 0.763.53 ± 0.10
-2494 785 18184.859 ± 0.035.139 ± 0.004123.42 ± 0.893.53 ± 0.10
-25055 14184.984 ± 0.035.139 ± 0.004126.59 ± 0.893.53 ± 0.10
-2515 185 38185.109 ± 0.035.139 ± 0.004129.77 ± 0.893.53 ± 0.10
-2525 145 12185.234 ± 0.035.139 ± 0.004132.94 ± 0.893.53 ± 0.10
-2535 385 58185.359 ± 0.035.139 ± 0.004136.12 ± 0.893.53 ± 0.10
-2545 125 34185.484 ± 0.035.139 ± 0.004139.29 ± 0.893.53 ± 0.10
-2555 585 78185.609 ± 0.035.139 ± 0.004142.47 ± 0.893.53 ± 0.10
-2565 346185.734 ± 0.035.139 ± 0.004145.64 ± 0.893.53 ± 0.10
-2575 786 18185.859 ± 0.035.139 ± 0.004148.82 ± 0.893.53 ± 0.10
-25866 14185.984 ± 0.035.139 ± 0.004151.99 ± 0.893.53 ± 0.10
-2596 146 12186.234 ± 0.040.139 ± 0.004158.34 ± 1.023.53 ± 0.10
-2606 126 34186.484 ± 0.040.139 ± 0.004164.69 ± 1.023.53 ± 0.10
-2616 347186.734 ± 0.040.139 ± 0.004171.04 ± 1.023.53 ± 0.10
-26277 14186.984 ± 0.040.139 ± 0.004177.39 ± 1.023.53 ± 0.10
-2637 147 12187.234 ± 0.045.139 ± 0.004183.74 ± 1.143.53 ± 0.10
-2647 127 34187.484 ± 0.045.139 ± 0.004190.09 ± 1.143.53 ± 0.10
-2657 348187.734 ± 0.045.139 ± 0.004196.44 ± 1.143.53 ± 0.10
-26688 14187.984 ± 0.045.139 ± 0.004202.79 ± 1.143.53 ± 0.10
-2678 148 12188.234 ± 0.050.139 ± 0.004209.14 ± 1.273.53 ± 0.10
-2688 128 34188.484 ± 0.050.139 ± 0.004215.49 ± 1.273.53 ± 0.10
-2698 349188.734 ± 0.050.139 ± 0.004221.84 ± 1.273.53 ± 0.10
-27099 14188.984 ± 0.050.139 ± 0.004228.19 ± 1.273.53 ± 0.10
-2719 149 12189.234 ± 0.055.139 ± 0.004234.54 ± 1.403.53 ± 0.10
-2729 129 34189.484 ± 0.055.139 ± 0.004240.89 ± 1.403.53 ± 0.10
-2739 3410189.734 ± 0.055.139 ± 0.004247.24 ± 1.403.53 ± 0.10
-2741010 14189.984 ± 0.055.139 ± 0.004253.59 ± 1.403.53 ± 0.10
-27510 1210 341810.484 ± 0.055.139 ± 0.004266.29 ± 1.403.53 ± 0.10
-2761111 141810.984 ± 0.065.139 ± 0.004278.99 ± 1.653.53 ± 0.10
-27711 1211 341811.484 ± 0.065.139 ± 0.004291.69 ± 1.653.53 ± 0.10
-2781212 141811.984 ± 0.065.139 ± 0.004304.39 ± 1.653.53 ± 0.10
-2791313 141812.984 ± 0.065.139 ± 0.004329.79 ± 1.653.53 ± 0.10
-2801414 141813.984 ± 0.065.139 ± 0.004355.19 ± 1.653.53 ± 0.10
-2811515 141814.984 ± 0.065.139 ± 0.004380.59 ± 1.653.53 ± 0.10
-2821616 141815.955 ± 0.075.139 ± 0.004405.26 ± 1.913.53 ± 0.10
-2831717 141816.955 ± 0.080.139 ± 0.004430.66 ± 2.033.53 ± 0.10
-2841818 141817.955 ± 0.085.139 ± 0.004456.06 ± 2.163.53 ± 0.10

O-rings with a nominal cross-section of 316 inch (-3##)

Size reference code (dash number)Nominal size in inchesDecimal size in inchesDecimal size in millimeters
IDODCross-sectionIDCross-sectionIDCross-section
-3097161316316.412 ± 0.005.210 ± 0.00510.46 ± 0.135.33 ± 0.13
-3101278316.475 ± 0.005.210 ± 0.00512.07 ± 0.135.33 ± 0.13
-31191615-16316.537 ± 0.007.210 ± 0.00513.64 ± 0.185.33 ± 0.13
-312581316.600 ± 0.009.210 ± 0.00515.24 ± 0.235.33 ± 0.13
-31311161 116316.662 ± 0.009.210 ± 0.00516.81 ± 0.235.33 ± 0.13
-314341 18316.725 ± 0.010.210 ± 0.00518.42 ± 0.255.33 ± 0.13
-31513161 316316.787 ± 0.010.210 ± 0.00519.99 ± 0.255.33 ± 0.13
-316781 14316.850 ± 0.010.210 ± 0.00521.59 ± 0.255.33 ± 0.13
-31715161 516316.912 ± 0.010.210 ± 0.00523.16 ± 0.255.33 ± 0.13
-31811 38316.975 ± 0.010.210 ± 0.00524.77 ± 0.255.33 ± 0.13
-3191 1161 7163161.037 ± 0.010.210 ± 0.00526.34 ± 0.255.33 ± 0.13
-3201 181 123161.100 ± 0.012.210 ± 0.00527.94 ± 0.305.33 ± 0.13
-3211 3161 9163161.162 ± 0.012.210 ± 0.00529.51 ± 0.305.33 ± 0.13
-3221 141 583161.225 ± 0.012.210 ± 0.00531.12 ± 0.305.33 ± 0.13
-3231 5161 11163161.287 ± 0.012.210 ± 0.00532.69 ± 0.305.33 ± 0.13
-3241 381 343161.350 ± 0.012.210 ± 0.00534.29 ± 0.305.33 ± 0.13
-3251 121 783161.475 ± 0.015.210 ± 0.00537.47 ± 0.385.33 ± 0.13
-3261 5823161.600 ± 0.015.210 ± 0.00540.64 ± 0.385.33 ± 0.13
-3271 342 183161.725 ± 0.015.210 ± 0.00543.82 ± 0.385.33 ± 0.13
-3281 782 143161.850 ± 0.015.210 ± 0.00546.99 ± 0.385.33 ± 0.13
-32922 383161.975 ± 0.018.210 ± 0.00550.17 ± 0.465.33 ± 0.13
-3302 182 123162.100 ± 0.018.210 ± 0.00553.34 ± 0.465.33 ± 0.13
-3312 142 583162.225 ± 0.018.210 ± 0.00556.52 ± 0.465.33 ± 0.13
-3322 382 343162.350 ± 0.018.210 ± 0.00559.69 ± 0.465.33 ± 0.13
-3332 122 783162.475 ± 0.020.210 ± 0.00562.87 ± 0.515.33 ± 0.13
-3342 5833162.600 ± 0.020.210 ± 0.00566.04 ± 0.515.33 ± 0.13
-3352 343 183162.725 ± 0.020.210 ± 0.00569.22 ± 0.515.33 ± 0.13
-3362 783 143162.850 ± 0.020.210 ± 0.00572.39 ± 0.515.33 ± 0.13
-33733 383162.975 ± 0.024.210 ± 0.00575.57 ± 0.615.33 ± 0.13
-3383 183 123163.100 ± 0.024.210 ± 0.00578.74 ± 0.615.33 ± 0.13
-3393 143 583163.225 ± 0.024.210 ± 0.00581.92 ± 0.615.33 ± 0.13
-3403 383 343163.350 ± 0.024.210 ± 0.00585.09 ± 0.615.33 ± 0.13
-3413 123 783163.475 ± 0.024.210 ± 0.00588.27 ± 0.615.33 ± 0.13
-3423 5843163.600 ± 0.028.210 ± 0.00591.44 ± 0.715.33 ± 0.13
-3433 344 183163.725 ± 0.028.210 ± 0.00594.62 ± 0.715.33 ± 0.13
-3443 784 143163.850 ± 0.028.210 ± 0.00597.79 ± 0.715.33 ± 0.13
-34544 383163.975 ± 0.028.210 ± 0.005100.97 ± 0.715.33 ± 0.13
-3464 184 123164.100 ± 0.028.210 ± 0.005104.14 ± 0.715.33 ± 0.13
-3474 144 583164.225 ± 0.030.210 ± 0.005107.32 ± 0.765.33 ± 0.13
-3484 384 343164.350 ± 0.030.210 ± 0.005110.49 ± 0.765.33 ± 0.13
-3494 124 783164.475 ± 0.030.210 ± 0.005113.67 ± 0.765.33 ± 0.13
-3504 5853164.600 ± 0.030.210 ± 0.005116.84 ± 0.765.33 ± 0.13
-3514 345 183164.725 ± 0.030.210 ± 0.005120.02 ± 0.765.33 ± 0.13
-3524 785 143164.850 ± 0.030.210 ± 0.005123.19 ± 0.765.33 ± 0.13
-35355 383164.975 ± 0.037.210 ± 0.005126.37 ± 0.945.33 ± 0.13
-3545 185 123165.100 ± 0.037.210 ± 0.005129.54 ± 0.945.33 ± 0.13
-3555 145 583165.225 ± 0.037.210 ± 0.005132.72 ± 0.945.33 ± 0.13
-3565 385 343165.350 ± 0.037.210 ± 0.005135.89 ± 0.945.33 ± 0.13
-3575 125 783165.475 ± 0.037.210 ± 0.005139.07 ± 0.945.33 ± 0.13
-3585 5863165.600 ± 0.037.210 ± 0.005142.24 ± 0.945.33 ± 0.13
-3595 346 183165.725 ± 0.037.210 ± 0.005145.42 ± 0.945.33 ± 0.13
-3605 786 143165.850 ± 0.037.210 ± 0.005148.59 ± 0.945.33 ± 0.13
-36166 383165.975 ± 0.037.210 ± 0.005151.77 ± 0.945.33 ± 0.13
-3626 146 583166.225 ± 0.040.210 ± 0.005158.12 ± 1.025.33 ± 0.13
-3636 126 783166.475 ± 0.040.210 ± 0.005164.47 ± 1.025.33 ± 0.13
-3646 347 183166.725 ± 0.040.210 ± 0.005170.82 ± 1.025.33 ± 0.13
-36577 383166.975 ± 0.040.210 ± 0.005177.17 ± 1.025.33 ± 0.13
-3667 147 583167.225 ± 0.045.210 ± 0.005183.52 ± 1.145.33 ± 0.13
-3677 127 783167.475 ± 0.045.210 ± 0.005189.87 ± 1.145.33 ± 0.13
-3687 348 183167.725 ± 0.045.210 ± 0.005196.22 ± 1.145.33 ± 0.13
-36988 383167.975 ± 0.045.210 ± 0.005202.57 ± 1.145.33 ± 0.13
-3708 148 583168.225 ± 0.050.210 ± 0.005208.92 ± 1.275.33 ± 0.13
-3718 128 783168.475 ± 0.050.210 ± 0.005215.27 ± 1.275.33 ± 0.13
-3728 349 183168.725 ± 0.050.210 ± 0.005221.62 ± 1.275.33 ± 0.13
-37399 383168.975 ± 0.050.210 ± 0.005227.97 ± 1.275.33 ± 0.13
-3749 149 583169.225 ± 0.055.210 ± 0.005234.32 ± 1.405.33 ± 0.13
-3759 129 783169.475 ± 0.055.210 ± 0.005240.67 ± 1.405.33 ± 0.13
-3769 3410 183169.725 ± 0.055.210 ± 0.005247.02 ± 1.405.33 ± 0.13
-3771010 383169.975 ± 0.055.210 ± 0.005253.37 ± 1.405.33 ± 0.13
-37810 1210 7831610.475 ± 0.060.210 ± 0.005266.07 ± 1.525.33 ± 0.13
-3791111 3831610.975 ± 0.060.210 ± 0.005278.77 ± 1.525.33 ± 0.13
-38011 1211 7831611.475 ± 0.065.210 ± 0.005291.47 ± 1.655.33 ± 0.13
-3811212 3831611.975 ± 0.065.210 ± 0.005304.17 ± 1.655.33 ± 0.13
-3821313 3831612.975 ± 0.065.210 ± 0.005329.57 ± 1.655.33 ± 0.13
-3831414 3831613.975 ± 0.070.210 ± 0.005354.97 ± 1.785.33 ± 0.13
-3841515 3831614.975 ± 0.070.210 ± 0.005380.37 ± 1.785.33 ± 0.13
-3851616 3831615.955 ± 0.075.210 ± 0.005405.26 ± 1.915.33 ± 0.13
-3861717 3831616.955 ± 0.080.210 ± 0.005430.66 ± 2.035.33 ± 0.13
-3871818 3831617.955 ± 0.085.210 ± 0.005456.06 ± 2.165.33 ± 0.13
-3881919 3831618.955 ± 0.090.210 ± 0.005481.46 ± 2.295.33 ± 0.13
-3892020 3831619.955 ± 0.095.210 ± 0.005506.86 ± 2.415.33 ± 0.13
-3902121 3831620.955 ± 0.095.210 ± 0.005532.26 ± 2.415.33 ± 0.13
-3912222 3831621.955 ± 0.100.210 ± 0.005557.66 ± 2.545.33 ± 0.13
-3922323 3831622.940 ± 0.105.210 ± 0.005582.68 ± 2.675.33 ± 0.13
-3932424 3831623.940 ± 0.110.210 ± 0.005608.08 ± 2.795.33 ± 0.13
-3942525 3831624.940 ± 0.115.210 ± 0.005633.48 ± 2.925.33 ± 0.13
-3952626 3831625.940 ± 0.120.210 ± 0.005658.88 ± 3.055.33 ± 0.13

O-rings with a nominal cross-section of 14 inch (-4##)

Size reference code (dash number)Nominal size in inchesDecimal size in inchesDecimal size in millimeters
IDODCross-sectionIDCross-sectionIDCross-section
-4254 125144.475 ± 0.033.275 ± 0.006113.67 ± 0.846.99 ± 0.15
-4264 585 18144.600 ± 0.033.275 ± 0.006116.84 ± 0.846.99 ± 0.15
-4274 345 14144.725 ± 0.033.275 ± 0.006120.02 ± 0.846.99 ± 0.15
-4284 785 38144.850 ± 0.033.275 ± 0.006123.19 ± 0.846.99 ± 0.15
-42955 12144.975 ± 0.037.275 ± 0.006126.37 ± 0.946.99 ± 0.15
-4305 185 58145.100 ± 0.037.275 ± 0.006129.54 ± 0.946.99 ± 0.15
-4315 145 34145.225 ± 0.037.275 ± 0.006132.72 ± 0.946.99 ± 0.15
-4325 385 78145.350 ± 0.037.275 ± 0.006135.89 ± 0.946.99 ± 0.15
-4335 126145.475 ± 0.037.275 ± 0.006139.07 ± 0.946.99 ± 0.15
-4345 586 18145.600 ± 0.037.275 ± 0.006142.24 ± 0.946.99 ± 0.15
-4355 346 14145.725 ± 0.037.275 ± 0.006145.42 ± 0.946.99 ± 0.15
-4365 786 38145.850 ± 0.037.275 ± 0.006148.59 ± 0.946.99 ± 0.15
-43766 12145.975 ± 0.037.275 ± 0.006151.77 ± 0.946.99 ± 0.15
-4386 146 34146.225 ± 0.040.275 ± 0.006158.12 ± 1.026.99 ± 0.15
-4396 127146.475 ± 0.040.275 ± 0.006164.47 ± 1.026.99 ± 0.15
-4406 347 14146.725 ± 0.040.275 ± 0.006170.82 ± 1.026.99 ± 0.15
-44177 12146.975 ± 0.040.275 ± 0.006177.17 ± 1.026.99 ± 0.15
-4427 147 34147.225 ± 0.045.275 ± 0.006183.52 ± 1.146.99 ± 0.15
-4437 128147.475 ± 0.045.275 ± 0.006189.87 ± 1.146.99 ± 0.15
-4447 348 14147.725 ± 0.045.275 ± 0.006196.22 ± 1.146.99 ± 0.15
-44588 12147.975 ± 0.045.275 ± 0.006202.57 ± 1.146.99 ± 0.15
-4468 129148.475 ± 0.055.275 ± 0.006215.27 ± 1.406.99 ± 0.15
-44799 12148.975 ± 0.055.275 ± 0.006227.97 ± 1.406.99 ± 0.15
-4489 1210149.475 ± 0.055.275 ± 0.006240.67 ± 1.406.99 ± 0.15
-4491010 12149.975 ± 0.055.275 ± 0.006253.37 ± 1.406.99 ± 0.15
-45010 12111410.475 ± 0.060.275 ± 0.006266.07 ± 1.526.99 ± 0.15
-4511111 121410.975 ± 0.060.275 ± 0.006278.77 ± 1.526.99 ± 0.15
-45211 12121411.475 ± 0.060.275 ± 0.006291.47 ± 1.526.99 ± 0.15
-4531212 121411.975 ± 0.060.275 ± 0.006304.17 ± 1.526.99 ± 0.15
-45412 12131412.475 ± 0.060.275 ± 0.006316.87 ± 1.526.99 ± 0.15
-4551313 121412.975 ± 0.060.275 ± 0.006329.57 ± 1.526.99 ± 0.15
-45613 12141413.475 ± 0.070.275 ± 0.006342.27 ± 1.786.99 ± 0.15
-4571414 121413.975 ± 0.070.275 ± 0.006354.97 ± 1.786.99 ± 0.15
-45814 12151414.475 ± 0.070.275 ± 0.006367.67 ± 1.786.99 ± 0.15
-4591515 121414.975 ± 0.070.275 ± 0.006380.37 ± 1.786.99 ± 0.15
-46015 12161415.475 ± 0.070.275 ± 0.006393.07 ± 1.786.99 ± 0.15
-4611616 121415.955 ± 0.075.275 ± 0.006405.26 ± 1.916.99 ± 0.15
-46216 12171416.455 ± 0.075.275 ± 0.006417.96 ± 1.916.99 ± 0.15
-4631717 121416.955 ± 0.080.275 ± 0.006430.66 ± 2.036.99 ± 0.15
-46417 12181417.455 ± 0.085.275 ± 0.006443.36 ± 2.166.99 ± 0.15
-4651818 121417.955 ± 0.085.275 ± 0.006456.06 ± 2.166.99 ± 0.15
-46618 12191418.455 ± 0.085.275 ± 0.006468.76 ± 2.166.99 ± 0.15
-4671919 121418.955 ± 0.090.275 ± 0.006481.46 ± 2.296.99 ± 0.15
-46819 12201419.455 ± 0.090.275 ± 0.006494.16 ± 2.296.99 ± 0.15
-4692020 121419.955 ± 0.095.275 ± 0.006506.86 ± 2.416.99 ± 0.15
-4702121 121420.955 ± 0.095.275 ± 0.006532.26 ± 2.416.99 ± 0.15
-4712222 121421.955 ± 0.100.275 ± 0.006557.66 ± 2.546.99 ± 0.15
-4722323 121422.940 ± 0.105.275 ± 0.006582.68 ± 2.676.99 ± 0.15
-4732424 121423.940 ± 0.110.275 ± 0.006608.08 ± 2.796.99 ± 0.15
-4742525 121424.940 ± 0.115.275 ± 0.006633.48 ± 2.926.99 ± 0.15
-4752626 121425.940 ± 0.120.275 ± 0.006658.88 ± 3.056.99 ± 0.15

-9## O-rings

Size reference code (dash number)Decimal size in inchesDecimal size in millimeters
IDCross-sectionIDCross-section
-901.185 ± 0.005.056 ± 0.0034.70 ± 0.131.42 ± 0.08
-902.239 ± 0.005.064 ± 0.0036.07 ± 0.131.63 ± 0.08
-903.301 ± 0.005.064 ± 0.0037.65 ± 0.131.63 ± 0.08
-904.351 ± 0.005.072 ± 0.0038.92 ± 0.131.83 ± 0.08
-905.414 ± 0.005.072 ± 0.00310.52 ± 0.131.83 ± 0.08
-906.468 ± 0.005.078 ± 0.00311.89 ± 0.131.98 ± 0.08
-907.530 ± 0.007.082 ± 0.00313.46 ± 0.182.08 ± 0.08
-908.644 ± 0.009.087 ± 0.00316.36 ± 0.232.21 ± 0.08
-909.706 ± 0.009.097 ± 0.00317.93 ± 0.232.46 ± 0.08
-910.755 ± 0.009.097 ± 0.00319.18 ± 0.232.46 ± 0.08
-911.863 ± 0.009.116 ± 0.00421.92 ± 0.232.95 ± 0.10
-912.924 ± 0.009.116 ± 0.00423.47 ± 0.232.95 ± 0.10
-913.986 ± 0.010.116 ± 0.00425.04 ± 0.252.95 ± 0.10
-9141.047 ± 0.010.116 ± 0.00426.59 ± 0.252.95 ± 0.10
-9161.171 ± 0.010.116 ± 0.00429.74 ± 0.252.95 ± 0.10
-9181.355 ± 0.012.116 ± 0.00434.42 ± 0.302.95 ± 0.10
-9201.475 ± 0.014.118 ± 0.00437.47 ± 0.363.00 ± 0.10
-9241.720 ± 0.014.118 ± 0.00443.69 ± 0.363.00 ± 0.10
-9282.090 ± 0.018.118 ± 0.00453.09 ± 0.463.00 ± 0.10
-9322.338 ± 0.019.118 ± 0.00459.37 ± 0.473.00 ± 0.10