Monday to Saturday: 9:30 am - 5:30 pm

Advanced O-Ring

Sealing Solutions for

Demanding Applications

AS568 O Rings

AS-568 O-Ring

Major O-ring manufacturers follow the AS568B standard for maintaining standard sizes in their inventory. These sizes in Aerospace Standard (AS568B) given by the Society of Automotive Engineers are defined by dash numbers. Each dash number corresponds to a fixed size.

AS-568 O-Ring Sizing Chart

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

O Ring Sizing Diagram

SizeCS (in)ID (in)OD (in)CS (mm)ID (mm)OD (mm)
10.040.0290.1091.020.742.78
20.050.0420.1421.271.073.61
30.060.0560.1761.521.424.46
40.070.070.211.781.785.34
50.070.1010.2411.782.576.13
60.070.1140.2541.782.96.46
70.070.1450.2851.783.687.24
80.070.1760.3161.784.478.03
90.070.2080.3481.785.288.84
100.070.2390.3791.786.079.63
110.070.3010.4411.787.6511.21
120.070.3640.5041.789.2512.81
130.070.4260.5661.7810.8214.38
140.070.4890.6291.7812.4215.98
150.070.5510.6911.781417.56
160.070.6140.7541.7815.619.16
170.070.6760.8161.7817.1720.73
180.070.7390.8791.7818.7722.33
190.070.8010.9411.7820.3523.91
200.070.8641.0041.7821.9525.51
210.070.9261.0661.7823.5227.08
220.070.9891.1291.7825.1228.68
230.071.0511.1911.7826.730.26
240.071.1141.2541.7828.331.86
250.071.1761.3161.7829.8733.43
260.071.2391.3791.7831.4735.03
270.071.3011.4411.7833.0536.61
280.071.3641.5041.7834.6538.21
290.071.4891.6291.7837.8241.38
300.071.6141.7541.784144.56
310.071.7391.8791.7844.1747.73
320.071.8642.0041.7847.3550.91
330.071.9892.1291.7850.5254.08
340.072.1142.2541.7853.757.26
350.072.2392.3791.7856.8760.43
360.072.3642.5041.7860.0563.61
370.072.4892.6291.7863.2266.78
380.072.6142.7541.7866.469.96
390.072.7392.8791.7869.5773.13
400.072.8643.0041.7872.7576.31
410.072.9893.1291.7875.9279.48
420.073.2393.3791.7882.2785.83
430.073.4893.6291.7888.6292.18
440.073.7393.8791.7894.9798.53
450.073.9894.1291.78101.32104.88
460.074.2394.3791.78107.67111.23
470.074.4894.6291.78114.02117.58
480.074.7394.8791.78120.37123.93
490.074.9895.1291.78126.72130.28
500.075.2395.3791.78133.07136.63
1020.1030.0490.2552.621.246.48
1030.1030.0810.2872.622.067.3
1040.1030.1120.3182.622.848.08
1050.1030.1430.3492.623.638.87
1060.1030.1740.382.624.429.66
1070.1030.2060.4122.625.2310.47
1080.1030.2370.4432.626.0211.26
1090.1030.2990.5052.627.5912.83
1100.1030.3620.5682.629.1914.43
1110.1030.4240.632.6210.7716.01
1120.1030.4870.6932.6212.3717.61
1130.1030.5490.7552.6213.9419.18
1140.1030.6120.8182.6215.5420.78
1150.1030.6740.882.6217.1222.36
1160.1030.7370.9432.6218.7223.96
1170.1030.7991.0052.6220.2925.54
1180.1030.8621.0682.6221.8927.13
1190.1030.9241.132.6223.4728.71
1200.1030.9871.1932.6225.0730.31
1210.1031.0491.2552.6226.6431.88
1220.1031.1121.3182.6228.2433.48
1230.1031.1741.382.6229.8235.06
1240.1031.2371.4432.6231.4236.66
1250.1031.2991.5052.6232.9938.23
1260.1031.3621.5682.6234.5939.83
1270.1031.4241.632.6236.1741.41
1280.1031.4871.6932.6237.7743.01
1290.1031.5491.7552.6239.3444.58
1300.1031.6121.8182.6240.9446.18
1310.1031.6741.882.6242.5247.76
1320.1031.7371.9432.6244.1249.36
1330.1031.7992.0052.6245.6950.93
1340.1031.8622.0682.6247.2952.54
1350.1031.9252.1312.6248.954.14
1360.1031.9872.1932.6250.4755.71
1370.1032.052.2562.6252.0757.31
1380.1032.1122.3182.6253.6458.88
1390.1032.1752.3812.6255.2560.49
1400.1032.2372.4432.6256.8262.06
1410.1032.32.5062.6258.4263.66
1420.1032.3622.5682.6259.9965.23
1430.1032.4252.6312.6261.666.84
1440.1032.4872.6932.6263.1768.41
1450.1032.552.7562.6264.7770.01
1460.1032.6122.8182.6266.3471.58
1470.1032.6752.8812.6267.9573.19
1480.1032.7372.9432.6269.5274.76
1490.1032.83.0062.6271.1276.36
1500.1032.8623.0682.6272.6977.93
1510.1032.9873.1932.6275.8781.11
1520.1033.2373.4432.6282.2287.46
1530.1033.4873.6932.6288.5793.81
1540.1033.7373.9432.6294.92100.16
1550.1033.9874.1932.62101.27106.51
1560.1034.2374.4432.62107.62112.86
1570.1034.4874.6932.62113.97119.21
1580.1034.7374.9432.62120.32125.56
1590.1034.9875.1932.62126.67131.91
1600.1035.2375.4432.62133.02138.26
1610.1035.4875.6932.62139.37144.61
1620.1035.7375.9432.62145.72150.96
1630.1035.9876.1932.62152.07157.31
1640.1036.2376.4432.62158.42163.66
1650.1036.4876.6932.62164.77170.01
1660.1036.7376.9432.62171.12176.36
1670.1036.9877.1932.62177.47182.71
1680.1037.2377.4432.62183.82189.06
1690.1037.4877.6932.62190.17195.41
1700.1037.7377.9432.62196.52201.76
1710.1037.9878.1932.62202.87208.11
1720.1038.2378.4432.62209.22214.46
1730.1038.4878.6932.62215.57220.81
1740.1038.7378.9432.62221.92227.16
1750.1038.9879.1932.62228.27233.51
1760.1039.2379.4432.62234.62239.86
1770.1039.4879.6932.62240.97246.21
1780.1039.7379.9432.62247.32252.56
2010.1390.1710.4493.534.3411.4
2020.1390.2340.5123.535.9413
2030.1390.2960.5743.537.5214.58
2040.1390.3590.6373.539.1216.18
2050.1390.4210.6993.5310.6917.75
2060.1390.4840.7623.5312.2919.35
2070.1390.5460.8243.5313.8720.93
2080.1390.6090.8873.5315.4722.53
2090.1390.6710.9493.5317.0424.1
2100.1390.7341.0123.5318.6425.7
2110.1390.7961.0743.5320.2227.28
2120.1390.8591.1373.5321.8228.88
2130.1390.9211.1993.5323.3930.45
2140.1390.9841.2623.5324.9932.06
2150.1391.0461.3243.5326.5733.63
2160.1391.1091.3873.5328.1735.23
2170.1391.1711.4493.5329.7436.8
2180.1391.2341.5123.5331.3438.4
2190.1391.2961.5743.5332.9239.98
2200.1391.3591.6373.5334.5241.58
2210.1391.4211.6993.5336.0943.15
2220.1391.4841.7623.5337.6944.75
2230.1391.6091.8873.5340.8747.93
2240.1391.7342.0123.5344.0451.1
2250.1391.8592.1373.5347.2254.28
2260.1391.9842.2623.5350.3957.45
2270.1392.1092.3873.5353.5760.63
2280.1392.2342.5123.5356.7463.8
2290.1392.3592.6373.5359.9266.98
2300.1392.4842.7623.5363.0970.15
2310.1392.6092.8873.5366.2773.33
2320.1392.7343.0123.5369.4476.5
2330.1392.8593.1373.5372.6279.68
2340.1392.9843.2623.5375.7982.85
2350.1393.1093.3873.5378.9786.03
2360.1393.2343.5123.5382.1489.2
2370.1393.3593.6373.5385.3292.38
2380.1393.4843.7623.5388.4995.55
2390.1393.6093.8873.5391.6798.73
2400.1393.7344.0123.5394.84101.9
2410.1393.8594.1373.5398.02105.08
2420.1393.9844.2623.53101.19108.25
2430.1394.1094.3873.53104.37111.43
2440.1394.2344.5123.53107.54114.6
2450.1394.3594.6373.53110.72117.78
2460.1394.4844.7623.53113.89120.95
2470.1394.6094.8873.53117.07124.13
2480.1394.7345.0123.53120.24127.3
2490.1394.8595.1373.53123.42130.48
2500.1394.9845.2623.53126.59133.65
2510.1395.1095.3873.53129.77136.83
2520.1395.2345.5123.53132.94140
2530.1395.3595.6373.53136.12143.18
2540.1395.4845.7623.53139.29146.35
2550.1395.6095.8873.53142.47149.53
2560.1395.7346.0123.53145.64152.71
2570.1395.8596.1373.53148.82155.88
2580.1395.9846.2623.53151.99159.05
2590.1396.2346.5123.53158.34165.4
2600.1396.4846.7623.53164.69171.75
2610.1396.7347.0123.53171.04178.1
2620.1396.9847.2623.53177.39184.45
2630.1397.2347.5123.53183.74190.8
2640.1397.4847.7623.53190.09197.15
2650.1397.7348.0123.53196.44203.5
2660.1397.9848.2623.53202.79209.85
2670.1398.2348.5123.53209.14216.2
2680.1398.4848.7623.53215.49222.55
2690.1398.7349.0123.53221.84228.9
2700.1398.9849.2623.53228.19235.25
2710.1399.2349.5123.53234.54241.6
2720.1399.4849.7623.53240.89247.95
2730.1399.73410.0123.53247.24254.3
2740.1399.98410.2623.53253.59260.65
2750.13910.48410.7623.53266.29273.35
2760.13910.98411.2623.53278.99286.05
2770.13911.48411.7623.53291.69298.75
2780.13911.98412.2623.53304.39311.45
2790.13912.98413.2623.53329.79336.85
2800.13913.98414.2623.53355.19362.25
2810.13914.98415.2623.53380.59387.65
2820.13915.95516.2333.53405.26412.32
2830.13916.95517.2333.53430.66437.72
2840.13917.95518.2333.53456.06463.12
3090.210.4120.8325.3310.4621.12
3100.210.4750.8955.3312.0722.73
3110.210.5370.9575.3313.6424.3
3120.210.61.025.3315.2425.9
3130.210.6621.0825.3316.8127.47
3140.210.7251.1455.3318.4229.08
3150.210.7871.2075.3319.9930.65
3160.210.851.275.3321.5932.25
3170.210.9121.3325.3323.1633.82
3180.210.9751.3955.3324.7735.43
3190.211.0371.4575.3326.3437
3200.211.11.525.3327.9438.6
3210.211.1621.5825.3329.5140.17
3220.211.2251.6455.3331.1241.78
3230.211.2871.7075.3332.6943.35
3240.211.351.775.3334.2944.95
3250.211.4751.8955.3337.4748.13
3260.211.62.025.3340.6451.3
3270.211.7252.1455.3343.8254.48
3280.211.852.275.3346.9957.65
3290.211.9752.3955.3350.1760.83
3300.212.12.525.3353.3464
3310.212.2252.6455.3356.5267.18
3320.212.352.775.3359.6970.35
3330.212.4752.8955.3362.8773.53
3340.212.63.025.3366.0476.7
3350.212.7253.1455.3369.2279.88
3360.212.853.275.3372.3983.05
3370.212.9753.3955.3375.5786.23
3380.213.13.525.3378.7489.4
3390.213.2253.6455.3381.92102.58
3400.213.353.775.3385.0995.75
3410.213.4753.8955.3388.2798.93
3420.213.64.025.3391.44102.1
3430.213.7254.1455.3394.62105.28
3440.213.854.275.3397.79108.45
3450.213.9754.3955.33100.97111.63
3460.214.14.525.33104.14114.8
3470.214.2254.6455.33107.32117.98
3480.214.354.775.33110.49121.15
3490.214.4754.8955.33113.67124.33
3500.214.65.025.33116.84127.5
3510.214.7255.1455.33120.02130.68
3520.214.855.275.33123.19133.85
3530.214.9755.3955.33126.37137.03
3540.215.15.525.33129.54140.2
3550.215.2255.6455.33132.72143.38
3560.215.355.775.33135.89146.55
3570.215.4755.8955.33139.07149.73
3580.215.66.025.33142.24152.9
3590.215.7256.1455.33145.42156.08
3600.215.856.275.33148.59159.25
3610.215.9756.3955.33151.77162.43
3620.216.2256.6455.33158.12168.78
3630.216.4756.8955.33164.47175.13
3640.216.7257.1455.33170.82181.48
3650.216.9757.3955.33177.17187.83
3660.217.2257.6455.33183.52194.18
3670.217.4757.8955.33189.87200.53
3680.217.7258.1455.33196.22206.88
3690.217.9758.3955.33202.57213.23
3700.218.2258.6455.33208.92219.58
3710.218.4758.8955.33215.27225.93
3720.218.7259.1455.33221.62232.28
3730.218.9759.3955.33227.97238.63
3740.219.2259.6455.33234.32244.98
3750.219.4759.8955.33240.67251.33
3760.219.72510.1455.33247.02257.68
3770.219.97510.3955.33253.37264.03
3780.2110.47510.8955.33266.07276.73
3790.2110.97511.3955.33278.77289.43
3800.2111.47511.8955.33291.47302.13
3810.2111.97512.3955.33304.17314.83
3820.2112.97513.3955.33329.57340.23
3830.2113.97514.3955.33354.97365.63
3840.2114.97515.3955.33380.37391.03
3850.2115.95516.3755.33405.26415.92
3860.2116.95517.3755.33430.66441.32
3870.2117.95518.3755.33456.06466.72
3880.2118.95519.3755.33481.46492.07
3890.2119.95520.3755.33506.86517.47
3900.2120.95521.3755.33532.26542.87
3910.2121.95522.3755.33557.66568.27
3920.2122.9423.365.33582.68593.34
3930.2123.9424.365.33608.08618.74
3940.2124.9425.365.33633.48644.14
3950.2125.9426.365.33658.88669.54
4000.2751.351.96.9934.2948.26
4010.2751.4752.0256.9937.4751.44
4020.2751.62.156.9940.6454.61
4030.2751.7252.2756.9943.8257.79
4040.2751.852.46.9946.9960.96
4050.2751.9752.5256.9950.1764.14
4060.2752.12.656.9953.3467.31
4070.2752.2252.7756.9956.5270.49
4080.2752.352.96.9959.6973.66
4090.2752.4753.0256.9962.8776.84
4100.2752.63.156.9966.0480.01
4110.2752.7253.2756.9969.2283.19
4120.2752.853.46.9972.3986.36
4130.2752.9753.5256.9975.5789.54
4140.2753.13.656.9978.7492.71
4150.2753.2253.7756.9981.9295.89
4160.2753.353.96.9985.0999.06
4170.2753.4754.0256.9988.27102.24
4180.2753.64.156.9991.44105.41
4190.2753.7254.2756.9994.62108.59
4200.2753.854.46.9997.79111.76
4210.2753.9754.5256.99100.97114.94
4220.2754.14.656.99104.14118.11
4230.2754.2254.7756.99107.32121.29
4240.2754.354.96.99110.49124.46
4250.2754.4755.0256.99113.67127.65
4260.2754.65.156.99116.84130.82
4270.2754.7255.2756.99120.02134
4280.2754.855.46.99123.19137.17
4290.2754.9755.5256.99126.37140.35
4300.2755.15.656.99129.54143.52
4310.2755.2255.7756.99132.72146.7
4320.2755.355.96.99135.89149.87
4330.2755.4756.0256.99139.07153.05
4340.2755.66.156.99142.24156.22
4350.2755.7256.2756.99145.42159.4
4360.2755.856.46.99148.59162.57
4370.2755.9756.5256.99151.77165.75
4380.2756.2256.7756.99158.12172.1
4390.2756.4757.0256.99164.47178.45
4400.2756.7257.2756.99170.82184.8
4410.2756.9757.5256.99177.17191.15
4420.2757.2257.7756.99183.52197.5
4430.2757.4758.0256.99189.87203.85
4440.2757.7258.2756.99196.22210.2
4450.2757.9758.5256.99202.57216.55
4460.2758.4759.0256.99215.27229.25
4470.2758.9759.5256.99227.97241.95
4480.2759.47510.0256.99240.67254.65
4490.2759.97510.5256.99253.37267.35
4500.27510.47511.0256.99266.07280.05
4510.27510.97511.5256.99278.77292.75
4520.27511.47512.0256.99291.47305.45
4530.27511.97512.5256.99304.17318.15
4540.27512.47513.0256.99316.87330.85
4550.27512.97513.5256.99329.57343.55
4560.27513.45714.0076.99342.27356.25
4570.27513.97514.5256.99354.97368.95
4580.27514.47515.0256.99367.67381.65
4590.27514.97515.5256.99380.37394.35
4600.27515.47516.0256.99393.07407.05
4610.27515.95516.5056.99405.26419.24
4620.27516.45517.0056.99417.96431.94
4630.27516.95517.5056.99430.66444.64
4640.27517.45518.0056.99443.36457.34
4650.27517.95518.5056.99456.06470.04
4660.27518.45519.0056.99468.76482.74
4670.27518.95519.5056.99481.46495.44
4680.27519.45520.0056.99494.16508.14
4690.27519.95520.5056.99506.86520.84
4700.27520.95521.5056.99532.26546.24
4710.27521.95522.5056.99557.66571.64
4720.27522.9423.496.99582.68596.66
4730.27523.9424.496.99608.08622.06
4740.27524.9425.496.99633.48647.46
4750.27525.9426.496.99658.88672.86
9010.0560.1850.2971.424.77.54
9020.0640.2390.3671.636.079.33
9030.0640.3010.4291.637.6510.91
9040.0720.3510.4951.838.9212.58
9050.0720.4140.5581.8310.5214.18
9060.0780.4680.6241.9811.8915.85
9070.0820.530.6942.0813.4617.62
9080.0870.6440.8182.2116.3620.78
9090.0970.7060.92.4617.9322.85
9100.0970.7550.9492.4619.1824.1
9110.1160.8631.0952.9521.9227.82
9120.1160.9241.1562.9523.4729.37
9130.1160.9861.2182.9525.0430.94
9140.1161.0471.2792.9526.5932.49
9160.1161.1711.4032.9529.7435.64
9180.1161.3551.5872.9534.4240.32
9200.1161.4751.707337.4743.47
9240.1161.721.952343.6949.69
9280.1162.092.322353.0959.09
9320.1162.3372.569359.3665.36
SearchSearchSearchSearchSearchSearchSearch

Get in Touch

Simply fill in your details and our representative will get in touch with you to discuss your requirements.

Other Size Standards

BS-1806

British Standard or BS standard includes all sizes in…

JISB-2401

Platinum Cured Silicone Fabric Wrapped and SS Coiled Hoses

Metric Sizes

The Japanese Industrial Standard ( JIS B2401) is …

Additional Resources

O-Ring Failure Analysis Guide

Guide to understand cause of o-ring failure from observing defects

O-Ring Tolerance Calculator

Calculate the tolerance of the o-ring in your required size