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AS568 O-Ring Size Chart

AS568 O-Ring Size Chart

The Global O-Ring and Seal Size Reference Chart covers the AS568 O-Ring Sizes published by the Society of Automotive Engineers (S.A.E.), and includes the Extended Sizes in the 400 Series. Dimensional tolerances for all AS568 o-rings offered by Global O-Ring and Seal are in accordance with ISO 3601-1A. The purpose of this chart is to specify the inside diameters, cross-sections, tolerances, and size identification codes (dash numbers) for o-rings used in sealing applications and for straight thread tube fitting boss gaskets.
SeriesCS InchesToleranceCS Frac.CS MMID Range
Zero0.070± .0031/161.78
0.029" - 5.239"
1000.103± .0033/322.620.049" - 9.737"
200
0.139± .0041/83.530.171" - 17.955"
300
0.210± .0053/165.330.412" - 25.940"
400
0.275± .0061/46.991.350" - 25.940"
900variesvariesvaries1.42 - 3.000.185" - 2.337"
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AS568 O-Ring Size Reference Chart

Dash #CS NominalID NominalOD NominalCS InchID InchTol InchCS mmID mmTol mm
0011/321/323/320.040.029± .0041.020.74± .10
0023/643/649/640.050.042± .0041.271.07± .10
0031/161/163/160.060.056± .0041.521.42± .10
0041/165/6413/640.070.07± .0051.781.78± .13
0051/163/327/320.070.101± .0051.782.57± .13
0061/161/81/40.070.114± .0051.782.9± .13
0071/165/329/320.070.145± .0051.783.68± .13
0081/163/165/160.070.176± .0051.784.47± .13
0091/167/3211/320.070.208± .0051.785.28± .13
0101/161/43/80.070.239± .0051.786.07± .13
0111/165/167/160.070.301± .0051.787.65± .13
0121/163/81/20.070.364± .0051.789.25± .13
0131/167/169/160.070.426± .0051.7810.82± .13
0141/161/25/80.070.489± .0051.7812.42± .13
0151/169/1611/160.070.551± .0071.7814± .18
0161/165/83/40.070.614± .0091.7815.6± .23
0171/1611/1613/160.070.676± .0091.7817.17± .23
0181/163/47/80.070.739± .0091.7818.77± .23
0191/1613/1615/160.070.801± .0091.7820.35± .23
0201/167/810.070.864± .0091.7821.95± .23
0211/1615/161-1/160.070.926± .0091.7823.52± .23
0221/1611-1/80.070.989± .0101.7825.12± .25
0231/161-1/161-3/160.071.051± .0101.7826.7± .25
0241/161-1/81-1/40.071.114± .0101.7828.3± .25
0251/161-3/161-5/160.071.176± .0111.7829.87± .28
0261/161-1/41-3/80.071.239± .0111.7831.47± .28
0271/161-5/161-7/160.071.301± .0111.7833.05± .28
0281/161-3/81-1/20.071.364± .0131.7834.65± .33
0291/161-1/21-5/80.071.489± .0131.7837.82± .33
0301/161-5/81-3/40.071.614± .0131.7841± .33
0311/161-3/41-7/80.071.739± .0151.7844.17± .38
0321/161-7/820.071.864± .0151.7847.35± .38
0331/1622-1/80.071.989± .0181.7850.52± .46
0341/162-1/82-1/40.072.114± .0181.7853.7± .46
0351/162-1/42-3/80.072.239± .0181.7856.87± .46
0361/162-3/82-1/20.072.364± .0181.7860.05± .46
0371/162-1/22-5/80.072.489± .0181.7863.22± .46
0381/162-5/82-3/40.072.614± .0201.7866.4± .51
0391/162-3/42-7/80.072.739± .0201.7869.57± .51
0401/162-7/830.072.864± .0201.7872.75± .51
0411/1633-1/80.072.989± .0241.7875.92± .61
0421/163-1/43-3/80.073.239± .0241.7882.27± .61
0431/163-1/23-5/80.073.489± .0241.7888.62± .61
0441/163-3/43-7/80.073.739± .0271.7894.97± .69
0451/1644-1/80.073.989± .0271.78101.32± .69
0461/164-1/44-3/80.074.239± .0301.78107.67± .76
0471/164-1/24-5/80.074.489± .0301.78114.02± .76
0481/164-3/44-7/80.074.739± .0301.78120.37± .76
0491/1655-1/80.074.989± .0371.78126.72± .94
0501/165-1/45-3/80.075.239± .0371.78133.07± .94
1023/321/161/40.1030.049± .0052.621.24± .13
1033/323/329/320.1030.081± .0052.622.06± .13
1043/321/85/160.1030.112± .0052.622.84± .13
1053/325/3211/320.1030.143± .0052.623.63± .13
1063/323/163/80.1030.174± .0052.624.42± .13
1073/327/3213/320.1030.206± .0052.625.23± .13
1083/321/47/160.1030.237± .0052.626.02± .13
1093/325/161/20.1030.299± .0052.627.59± .13
1103/323/89/160.1030.362± .0052.629.19± .13
1113/327/165/80.1030.424± .0052.6210.77± .13
1123/321/211/160.1030.487± .0052.6212.37± .13
1133/329/163/40.1030.549± .0072.6213.94± .18
1143/325/813/160.1030.612± .0092.6215.54± .23
1153/3211/167/80.1030.674± .0092.6217.12± .23
1163/323/415/160.1030.737± .0092.6218.72± .23
1173/3213/1610.1030.799± .0102.6220.29± .25
1183/327/81-1/160.1030.862± .0102.6221.89± .25
1193/3215/161-1/80.1030.924± .0102.6223.47± .25
1203/3211-3/160.1030.987± .0102.6225.07± .25
1213/321-1/161-1/40.1031.049± .0102.6226.64± .25
1223/321-1/81-5/160.1031.112± .0102.6228.24± .25
1233/321-3/161-3/80.1031.174± .0122.6229.82± .30
1243/321-1/41-7/160.1031.237± .0122.6231.42± .30
1253/321-5/161-1/20.1031.299± .0122.6232.99± .30
1263/321-3/81-9/160.1031.362± .0122.6234.59± .30
1273/321-7/161-5/80.1031.424± .0122.6236.17± .30
1283/321-1/21-11/160.1031.487± .0122.6237.77± .30
1293/321-9/161-3/40.1031.549± .0152.6239.34± .38
1303/321-5/81-13/160.1031.612± .0152.6240.94± .38
1313/321-11/161-7/80.1031.674± .0152.6242.52± .38
1323/321-3/41-15/160.1031.737± .0152.6244.12± .38
1333/321-13/1620.1031.799± .0152.6245.69± .38
1343/321-7/82-1/160.1031.862± .0152.6247.29± .38
1353/321-15/162-1/80.1031.925± .0172.6248.9± .43
1363/3222-3/160.1031.987± .0172.6250.47± .43
1373/322-1/162-1/40.1032.05± .0172.6252.07± .43
1383/322-1/82-5/160.1032.112± .0172.6253.64± .43
1393/322-3/162-3/80.1032.175± .0172.6255.25± .43
1403/322-1/42-7/160.1032.237± .0172.6256.82± .43
1413/322-5/162-1/20.1032.3± .0202.6258.42± .51
1423/322-3/82-9/160.1032.362± .0202.6259.99± .51
1433/322-7/162-5/80.1032.425± .0202.6261.6± .51
1443/322-1/22-11/160.1032.487± .0202.6263.17± .51
1453/322-9/162-3/40.1032.55± .0202.6264.77± .51
1463/322-5/82-13/160.1032.612± .0202.6266.34± .51
1473/322-11/162-7/80.1032.675± .0222.6267.95± .56
1483/322-3/42-15/160.1032.737± .0222.6269.52± .56
1493/322-13/1630.1032.8± .0222.6271.12± .56
1503/322-7/83-1/160.1032.862± .0222.6272.69± .56
1513/3233-3/160.1032.987± .0242.6275.87± .61
1523/323-1/43-7/160.1033.237± .0242.6282.22± .61
1533/323-1/23-11/160.1033.487± .0242.6288.57± .61
1543/323-3/43-15/160.1033.737± .0282.6294.92± .71
1553/3244-3/160.1033.987± .0282.62101.27± .71
1563/324-1/44-7/160.1034.237± .0302.62107.62± .76
1573/324-1/24-11/160.1034.487± .0302.62113.97± .76
1583/324-3/44-15/160.1034.737± .0302.62120.32± .76
1593/3255-3/160.1034.987± .0352.62126.67± .89
1603/325-1/45-7/160.1035.237± .0352.62133.02± .89
1613/325-1/25-11/160.1035.487± .0352.62139.37± .89
1623/325-3/45-15/160.1035.737± .0352.62145.72± .89
1633/3266-3/160.1035.987± .0352.62152.07± .89
1643/326-1/46-7/160.1036.237± .0402.62158.42± 1.02
1653/326-1/26-11/160.1036.487± .0402.62164.77± 1.02
1663/326-3/46-15/160.1036.737± .0402.62171.12± 1.02
1673/3277-3/160.1036.987± .0402.62177.47± 1.02
1683/327-1/47-7/160.1037.237± .0452.62183.82± 1.14
1693/327-1/27-11/160.1037.487± .0452.62190.17± 1.14
1703/327-3/47-15/160.1037.737± .0452.62196.52± 1.14
1713/3288-3/160.1037.987± .0452.62202.87± 1.14
1723/328-1/48-7/160.1038.237± .0502.62209.22± 1.27
1733/328-1/28-11/160.1038.487± .0502.62215.57± 1.27
1743/328-3/48-15/160.1038.737± .0502.62221.92± 1.27
1753/3299-3/160.1038.987± .0502.62228.27± 1.27
1763/329-1/49-7/160.1039.237± .0552.62234.62± 1.40
1773/329-1/29-11/160.1039.487± .0552.62240.97± 1.40
1783/329-3/49-15/160.1039.737± .0552.62247.32± 1.40
2011/83/167/160.1390.171± .0053.534.34± .13
2021/81/41/20.1390.234± .0053.535.94± .13
2031/85/169/160.1390.296± .0053.537.52± .13
2041/83/85/80.1390.359± .0053.539.12± .13
2051/87/1611/160.1390.421± .0053.5310.69± .13
2061/81/23/40.1390.484± .0053.5312.29± .13
2071/89/1613/160.1390.546± .0073.5313.87± .18
2081/85/87/80.1390.609± .0093.5315.47± .23
2091/811/1615/160.1390.671± .0093.5317.04± .23
2101/83/410.1390.734± .0103.5318.64± .25
2111/813/161-1/160.1390.796± .0103.5320.22± .25
2121/87/81-1/80.1390.859± .0103.5321.82± .25
2131/815/161-3/160.1390.921± .0103.5323.39± .25
2141/811-1/40.1390.984± .0103.5324.99± .25
2151/81-1/161-5/160.1391.046± .0103.5326.57± .25
2161/81-1/81-3/80.1391.109± .0123.5328.17± .30
2171/81-3/161-7/160.1391.171± .0123.5329.74± .30
2181/81-1/41-1/20.1391.234± .0123.5331.34± .30
2191/81-5/161-9/160.1391.296± .0123.5332.92± .30
2201/81-3/81-5/80.1391.359± .0123.5334.52± .30
2211/81-7/161-11/160.1391.421± .0123.5336.09± .30
2221/81-1/21-3/40.1391.484± .0153.5337.69± .38
2231/81-5/81-7/80.1391.609± .0153.5340.87± .38
2241/81-3/420.1391.734± .0153.5344.04± .38
2251/81-7/82-1/80.1391.859± .0183.5347.22± .46
2261/822-1/40.1391.984± .0183.5350.39± .46
2271/82-1/82-3/80.1392.109± .0183.5353.57± .46
2281/82-1/42-1/20.1392.234± .0203.5356.74± .51
2291/82-3/82-5/80.1392.359± .0203.5359.92± .51
2301/82-1/22-3/40.1392.484± .0203.5363.09± .51
2311/82-5/82-7/80.1392.609± .0203.5366.27± .51
2321/82-3/430.1392.734± .0243.5369.44± .61
2331/82-7/83-1/80.1392.859± .0243.5372.62± .61
2341/833-1/40.1392.984± .0243.5375.79± .61
2351/83-1/83-3/80.1393.109± .0243.5378.97± .61
2361/83-1/43-1/20.1393.234± .0243.5382.14± .61
2371/83-3/83-5/80.1393.359± .0243.5385.32± .61
2381/83-1/23-3/40.1393.484± .0243.5388.49± .61
2391/83-5/83-7/80.1393.609± .0283.5391.67± .71
2401/83-3/440.1393.734± .0283.5394.84± .71
2411/83-7/84-1/80.1393.859± .0283.5398.02± .71
2421/844-1/40.1393.984± .0283.53101.19± .71
2431/84-1/84-3/80.1394.109± .0283.53104.37± .71
2441/84-1/44-1/20.1394.234± .0303.53107.54± .76
2451/84-3/84-5/80.1394.359± .0303.53110.72± .76
2461/84-1/24-3/40.1394.484± .0303.53113.89± .76
2471/84-5/84-7/80.1394.609± .0303.53117.07± .76
2481/84-3/450.1394.734± .0303.53120.24± .76
2491/84-7/85-1/80.1394.859± .0353.53123.42± .89
2501/855-1/40.1394.984± .0353.53126.59± .89
2511/85-1/85-3/80.1395.109± .0353.53129.77± .89
2521/85-1/45-1/20.1395.234± .0353.53132.94± .89
2531/85-3/85-5/80.1395.359± .0353.53136.12± .89
2541/85-1/25-3/40.1395.484± .0353.53139.29± .89
2551/85-5/85-7/80.1395.609± .0353.53142.47± .89
2561/85-3/460.1395.734± .0353.53145.64± .89
2571/85-7/86-1/80.1395.859± .0353.53148.82± .89
2581/866-1/40.1395.984± .0353.53151.99± .89
2591/86-1/46-1/20.1396.234± .0403.53158.34± 1.02
2601/86-1/26-3/40.1396.484± .0403.53164.69± 1.02
2611/86-3/470.1396.734± .0403.53171.04± 1.02
2621/877-1/40.1396.984± .0403.53177.39± 1.02
2631/87-1/47-1/20.1397.234± .0453.53183.74± 1.14
2641/87-1/27-3/40.1397.484± .0453.53190.09± 1.14
2651/87-3/480.1397.734± .0453.53196.44± 1.14
2661/888-1/40.1397.984± .0453.53202.79± 1.14
2671/88-1/48-1/20.1398.234± .0503.53209.14± 1.27
2681/88-1/28-3/40.1398.484± .0503.53215.49± 1.27
2691/88-3/490.1398.734± .0503.53221.84± 1.27
2701/899-1/40.1398.984± .0503.53228.19± 1.27
2711/89-1/49-1/20.1399.234± .0553.53234.54± 1.40
2721/89-1/29-3/40.1399.484± .0553.53240.89± 1.40
2731/89-3/4100.1399.734± .0553.53247.24± 1.40
2741/81010-1/40.1399.984± .0553.53253.59± 1.40
2751/810-1/210-3/40.13910.484± .0553.53266.29± 1.40
2761/81111-1/40.13910.984± .0653.53278.99± 1.65
2771/811-1/211-3/40.13911.484± .0653.53291.69± 1.65
2781/81212-1/40.13911.984± .0653.53304.39± 1.65
2791/81313-1/40.13912.984± .0653.53329.79± 1.65
2801/81414-1/40.13913.984± .0653.53355.19± 1.65
2811/81515-1/40.13914.984± .0653.53380.59± 1.65
2821/81616-1/40.13915.955± .0753.53405.26± 1.91
2831/81717-1/40.13916.955± .0803.53430.66± 2.03
2841/81818-1/40.13917.955± .0853.53456.06± 2.16
3093/167/1613/160.210.412± .0055.3310.46± .13
3103/161/27/80.210.475± .0055.3312.07± .13
3113/169/1615/160.210.537± .0075.3313.64± .18
3123/165/810.210.6± .0095.3315.24± .23
3133/1611/161-1/160.210.662± .0095.3316.81± .23
3143/163/41-1/80.210.725± .0105.3318.42± .25
3153/1613/161-3/160.210.787± .0105.3319.99± .25
3163/167/81-1/40.210.85± .0105.3321.59± .25
3173/1615/161-5/160.210.912± .0105.3323.16± .25
3183/1611-3/80.210.975± .0105.3324.77± .25
3193/161-1/161-7/160.211.037± .0105.3326.34± .25
3203/161-1/81-1/20.211.1± .0125.3327.94± .30
3213/161-3/161-9/160.211.162± .0125.3329.51± .30
3223/161-1/41-5/80.211.225± .0125.3331.12± .30
3233/161-5/161-11/160.211.287± .0125.3332.69± .30
3243/161-3/81-3/40.211.35± .0125.3334.29± .30
3253/161-1/21-7/80.211.475± .0155.3337.47± .38
3263/161-5/820.211.6± .0155.3340.64± .38
3273/161-3/42-1/80.211.725± .0155.3343.82± .38
3283/161-7/82-1/40.211.85± .0155.3346.99± .38
3293/1622-3/80.211.975± .0185.3350.17± .46
3303/162-1/82-1/20.212.1± .0185.3353.34± .46
3313/162-1/42-5/80.212.225± .0185.3356.52± .46
3323/162-3/82-3/40.212.35± .0185.3359.69± .46
3333/162-1/22-7/80.212.475± .0205.3362.87± .51
3343/162-5/830.212.6± .0205.3366.04± .51
3353/162-3/43-1/80.212.725± .0205.3369.22± .51
3363/162-7/83-1/40.212.85± .0205.3372.39± .51
3373/1633-3/80.212.975± .0245.3375.57± .61
3383/163-1/83-1/20.213.1± .0245.3378.74± .61
3393/163-1/43-5/80.213.225± .0245.3381.92± .61
3403/163-3/83-3/40.213.35± .0245.3385.09± .61
3413/163-1/23-7/80.213.475± .0245.3388.27± .61
3423/163-5/840.213.6± .0285.3391.44± .71
3433/163-3/44-1/80.213.725± .0285.3394.62± .71
3443/163-7/84-1/40.213.85± .0285.3397.79± .71
3453/1644-3/80.213.975± .0285.33100.97± .71
3463/164-1/84-1/20.214.1± .0285.33104.14± .71
3473/164-1/44-5/80.214.225± .0305.33107.32± .76
3483/164-3/84-3/40.214.35± .0305.33110.49± .76
3493/164-1/24-7/80.214.475± .0305.33113.67± .76
3503/164-5/850.214.6± .0305.33116.84± .76
3513/164-3/45-1/80.214.725± .0305.33120.02± .76
3523/164-7/85-1/40.214.85± .0305.33123.19± .76
3533/1655-3/80.214.975± .0375.33126.37± .94
3543/165-1/85-1/20.215.1± .0375.33129.54± .94
3553/165-1/45-5/80.215.225± .0375.33132.72± .94
3563/165-3/85-3/40.215.35± .0375.33135.89± .94
3573/165-1/25-7/80.215.475± .0375.33139.07± .94
3583/165-5/860.215.6± .0375.33142.24± .94
3593/165-3/46-1/80.215.725± .0375.33145.42± .94
3603/165-7/86-1/40.215.85± .0375.33148.59± .94
3613/1666-3/80.215.975± .0375.33151.77± .94
3623/166-1/46-5/80.216.225± .0405.33158.12± 1.02
3633/166-1/26-7/80.216.475± .0405.33164.47± 1.02
3643/166-3/47-1/80.216.725± .0405.33170.82± 1.02
3653/1677-3/80.216.975± .0405.33177.17± 1.02
3663/167-1/47-5/80.217.225± .0455.33183.52± 1.14
3673/167-1/27-7/80.217.475± .0455.33189.87± 1.14
3683/167-3/48-1/80.217.725± .0455.33196.22± 1.14
3693/1688-3/80.217.975± .0455.33202.57± 1.14
3703/168-1/48-5/80.218.225± .0505.33208.92± 1.27
3713/168-1/28-7/80.218.475± .0505.33215.27± 1.27
3723/168-3/49-1/80.218.725± .0505.33221.62± 1.27
3733/1699-3/80.218.975± .0505.33227.97± 1.27
3743/169-1/49-5/80.219.225± .0555.33234.32± 1.40
3753/169-1/29-7/80.219.475± .0555.33240.67± 1.40
3763/169-3/410-1/80.219.725± .0555.33247.02± 1.40
3773/161010-3/80.219.975± .0555.33253.37± 1.40
3783/1610-1/210-7/80.2110.475± .0605.33266.07± 1.52
3793/161111-3/80.2110.975± .0605.33278.77± 1.52
3803/1611-1/211-7/80.2111.475± .0655.33291.47± 1.65
3813/161212-3/80.2111.975± .0655.33304.17± 1.65
3823/161313-3/80.2112.975± .0655.33329.57± 1.65
3833/161414-3/80.2113.975± .0705.33354.97± 1.78
3843/161515-3/80.2114.975± .0705.33380.37± 1.78
3853/161616-3/80.2115.955± .0755.33405.26± 1.91
3863/161717-3/80.2116.955± .0805.33430.66± 2.03
3873/161818-3/80.2117.955± .0855.33456.06± 2.16
3883/161919-3/80.2118.955± .0905.33481.46± 2.29
3893/162020-3/80.2119.955± .0955.33506.86± 2.41
3903/162121-3/80.2120.955± .0955.33532.26± 2.41
3913/162222-3/80.2121.955± .0955.33557.66± 2.41
3923/162323-3/80.2122.94± .1055.33582.68± 2.67
3933/162424-3/80.2123.94± .1105.33608.08± 2.79
3943/162525-3/80.2124.94± .1155.33633.48± 2.92
3953/162626-3/80.2125.94± .1205.33658.88± 3.05
4001/41-3/81-7/80.2751.35± .0126.9934.29± .30
4011/41-1/220.2751.475± .0156.9937.47± .38
4021/41-5/82-1/80.2751.6± .0156.9940.64± .38
4031/41-3/42-1/40.2751.725± .0156.9943.82± .38
4041/41-7/82-3/80.2751.85± .0156.9946.99± .38
4051/422-1/20.2751.975± .0186.9950.17± .46
4061/42-1/82-5/80.2752.1± .0186.9953.34± .46
4071/42-1/42-3/40.2752.225± .0186.9956.52± .46
4081/42-3/82-7/80.2752.35± .0186.9959.69± .46
4091/42-1/230.2752.475± .0206.9962.87± .51
4101/42-5/83-1/80.2752.6± .0206.9966.04± .51
4111/42-3/43-1/40.2752.725± .0206.9969.22± .51
4121/42-7/83-3/80.2752.85± .0206.9972.39± .51
4131/433-1/20.2752.975± .0246.9975.57± .61
4141/43-1/83-5/80.2753.1± .0246.9978.74± .61
4151/43-1/43-3/40.2753.225± .0246.9981.92± .61
4161/43-3/83-7/80.2753.35± .0246.9985.09± .61
4171/43-1/240.2753.475± .0246.9988.27± .61
4181/43-5/84-1/80.2753.6± .0286.9991.44± .71
4191/43-3/44-1/40.2753.725± .0286.9994.62± .71
4201/43-7/84-3/80.2753.85± .0286.9997.79± .71
4211/444-1/20.2753.975± .0286.99100.97± .71
4221/44-1/84-5/80.2754.1± .0286.99104.14± .71
4231/44-1/44-3/40.2754.225± .0306.99107.32± .76
4241/44-3/84-7/80.2754.35± .0306.99110.49± .76
4251/44-1/250.2754.475± .0336.99113.67± .84
4261/44-5/85-1/80.2754.6± .0336.99116.84± .84
4271/44-3/45-1/40.2754.725± .0336.99120.02± .84
4281/44-7/85-3/80.2754.85± .0336.99123.19± .84
4291/455-1/20.2754.975± .0376.99126.37± .94
4301/45-1/85-5/80.2755.1± .0376.99129.54± .94
4311/45-1/45-3/40.2755.225± .0376.99132.72± .94
4321/45-3/85-7/80.2755.35± .0376.99135.89± .94
4331/45-1/260.2755.475± .0376.99139.07± .94
4341/45-5/86-1/80.2755.6± .0376.99142.24± .94
4351/45-3/46-1/40.2755.725± .0376.99145.42± .94
4361/45-7/86-3/80.2755.85± .0376.99148.59± .94
4371/466-1/20.2755.975± .0376.99151.77± .94
4381/46-1/46-3/40.2756.225± .0406.99158.12± 1.02
4391/46-1/270.2756.475± .0406.99164.47± 1.02
4401/46-3/47-1/40.2756.725± .0406.99170.82± 1.02
4411/477-1/20.2756.975± .0406.99177.17± 1.02
4421/47-1/47-3/40.2757.225± .0456.99183.52± 1.14
4431/47-1/280.2757.475± .0456.99189.87± 1.14
4441/47-3/48-1/40.2757.725± .0456.99196.22± 1.14
4451/488-1/20.2757.975± .0456.99202.57± 1.14
4461/48-1/290.2758.475± .0556.99215.27± 1.40
4471/499-1/20.2758.975± .0556.99227.97± 1.40
4481/49-1/2100.2759.475± .0556.99240.67± 1.40
4491/41010-1/20.2759.975± .0556.99253.37± 1.40
4501/410-1/2110.27510.475± .0606.99266.07± 1.52
4511/41111-1/20.27510.975± .0606.99278.77± 1.52
4521/411-1/2120.27511.475± .0606.99291.47± 1.52
4531/41212-1/20.27511.975± .0606.99304.17± 1.52
4541/412-1/2130.27512.475± .0606.99316.87± 1.52
4551/41313-1/20.27512.975± .0606.99329.57± 1.52
4561/413-1/2140.27513.475± .0706.99342.27± 1.78
4571/41414-1/20.27513.975± .0706.99354.97± 1.78
4581/414-1/2150.27514.475± .0706.99367.67± 1.78
4591/41515-1/20.27514.975± .0706.99380.37± 1.78
4601/415-1/2160.27515.475± .0706.99393.07± 1.78
4611/41616-1/20.27515.955± .0756.99405.26± 1.91
4621/416-1/2170.27516.455± .0756.99417.96± 1.91
4631/41717-1/20.27516.955± .0806.99430.66± 2.03
4641/417-1/2180.27517.455± .0856.99443.36± 2.16
4651/41818-1/20.27517.955± .0856.99456.06± 2.16
4661/418-1/2190.27518.455± .0856.99468.76± 2.16
4671/41919-1/20.27518.955± .0906.99481.46± 2.29
4681/419-1/2200.27519.455± .0906.99494.16± 2.29
4691/42020-1/20.27519.955± .0956.99506.86± 2.41
4701/42121-1/20.27520.955± .0956.99532.26± 2.41
4711/42222-1/20.27521.955± .1006.99557.66± 2.54
4721/42323-1/20.27522.94± .1056.99582.68± 2.67
4731/42424-1/20.27523.94± .1106.99608.08± 2.79
4741/42525-1/20.27524.94± .1156.99633.48± 2.92
4751/42626-1/20.27525.94± .1206.99658.88± 3.05
9010.0560.185± .0051.424.7± .13
9020.0640.239± .0051.636.07± .13
9030.0640.301± .0051.637.65± .13
9040.0720.351± .0051.838.92± .13
9050.0720.414± .0051.8310.52± .13
9060.0780.468± .0051.9811.89± .13
9070.0820.53± .0072.0813.46± .18
9080.0870.644± .0092.2116.36± .23
9090.0970.706± .0092.4617.93± .23
9100.0970.755± .0092.4619.18± .23
9110.1160.863± .0092.9521.92± .23
9120.1160.924± .0092.9523.47± .23
9130.1160.986± .0102.9525.04± .25
9140.1161.047± .0102.9526.59± .25
9160.1161.171± .0102.9529.74± .25
9180.1161.355± .0122.9534.42± .30
9200.1181.475± .014337.47± .36
9240.1181.72± .014343.69± .36
9280.1182.09± .018353.09± .46
9320.1182.337± .018359.36± .46
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History

This size chart was first published in 1971 by the A-6c2 Seals Committee at SAE (Society of Automotive Engineers) as Aerospace Standard AS568. These standards were later republished in 1974 as AS568A, in 2001 as AS568B, in 2008 as AS568C, and most recently in 2014 as AS568D. Any of these terms (AS568, AS568A, AS568B, AS568C, AS568D) may be used interchangeably when referring to an o-ring dash size.

Actual vs. Nominal

To assist our customers in selecting the correct size o-ring we have included 3 measurements for cross reference purposes; the “Nominal”, “Actual Inch”, and “Actual Metric” sizes. We are often asked, “What is the difference between Actual and Nominal sizes for o-rings?”. The Nominal (fractional) dimensions are in name only (often used when verbally describing the size). For more accurate measurements, please refer to the actual inch or millimeter sizes, as these are the true dimensions of the o-ring.

O-Ring Formulas

To calculate an o-ring’s outside diameter (OD) you may use this formula: 2(CS) + ID = OD
Conversely, if you have the OD and need to find the ID use this formula: OD – 2(CS) = ID

Get The AS568 O-Ring Reference Guide Emailed To You!

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