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Advanced O-Ring

Sealing Solutions for

Demanding Applications

JISB2401 O-Rings

JISB-2401 O-Ring

The Japanese Industrial Standard ( JIS B2401) are categorized in to 3 groups, namely, Aerospace Group, General Purpose Group and Traditional Group. These O rings are used in Japans’s Automotive, semi-conductor, heavy engineering and other allied industries.
The JIS B2401 follow ISO 3601-1 very closely with a few extra sizes.

JISB-2401 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)
G1000.1223.9134.1573.199.4105.6
G1050.1224.114.3543.1104.4110.6
G1100.1224.3074.5513.1109.4115.6
G1150.1224.5044.7483.1114.4120.6
G1200.1224.7014.9453.1119.4125.6
G1250.1224.8985.1423.1124.4130.6
G1300.1225.0945.3383.1129.4135.6
G1350.1225.2915.5353.1134.4140.6
G1400.1225.4885.7323.1139.4145.6
G1450.1225.6855.9293.1144.4150.6
G1500.2245.8786.3265.7149.3160.7
G1550.2246.0756.5235.7154.3165.7
G1600.2246.2726.725.7159.3170.7
G1650.2246.4696.9175.7164.3175.7
G1700.2246.6657.1135.7169.3180.7
G1750.2246.8627.315.7174.3185.7
G1800.2247.0597.5075.7179.3190.7
G1850.2247.2567.7045.7184.3195.7
G1900.2247.4537.9015.7189.3200.7
G1950.2247.658.0985.7194.3205.7
G2000.2247.8468.2945.7199.3210.7
G2100.2248.248.6885.7209.3220.7
G2200.2248.6349.0825.7219.3230.7
G2300.2249.0289.4765.7229.3240.7
G2400.2249.4219.8695.7239.3250.7
G250.1220.9611.2053.124.430.6
G2500.2249.81510.2635.7249.3260.7
G2550.22410.01210.465.7254.3265.7
G2600.22410.20910.6575.7259.3270.7
G2700.22410.60211.055.7269.3280.7
G2800.22410.99611.4445.7279.3290.7
G2900.22411.3911.8385.7289.3300.7
G300.1221.1571.4013.129.435.6
G3000.22411.78312.2315.7299.3310.7
G3050.22411.9812.4285.7304.3315.7
G3100.22412.17712.6255.7309.3320.7
G3150.22412.37412.8225.7314.3325.7
G3200.22412.57113.0195.7319.3330.7
G3250.22412.76813.2165.7324.3335.7
G3300.22412.96513.4135.7329.3340.7
G3350.22413.16113.6095.7334.3345.7
G3400.22413.35813.8065.7339.3350.7
G3450.22413.55514.0035.7344.3355.7
G350.1221.3541.5983.134.440.6
G3500.22413.75214.25.7349.3360.7
G3550.22413.94914.3975.7354.3365.7
G3600.22414.14614.5945.7359.3370.7
G3650.22414.34214.795.7364.3375.7
G3700.22414.53914.9875.7369.3380.7
G3750.22414.73615.1845.7374.3385.7
G3800.22414.93315.3815.7379.3390.7
G3850.22415.1315.5785.7384.3395.7
G3900.22415.32715.7755.7389.3400.7
G3950.22415.52415.9725.7394.3405.7
G400.1221.5511.7953.139.445.6
G4000.22415.7216.1685.7399.3410.7
G4050.22415.91716.3655.7404.3415.7
G4100.22416.11416.5625.7409.3420.7
G4150.22416.31116.7595.7414.3425.7
G4200.22416.50816.9565.7419.3430.7
G4250.22416.70517.1535.7424.3435.7
G4300.22416.90217.355.7429.3440.7
G4350.22417.09817.5465.7434.3445.7
G4400.22417.29517.7435.7439.3450.7
G4450.22417.49217.945.7444.3455.7
G450.1221.7481.9923.144.450.6
G4500.22417.68918.1375.7449.3460.7
G4550.22417.88618.3345.7454.3465.7
G4600.22418.08318.5315.7459.3470.7
G4650.22418.27918.7275.7464.3475.7
G4700.22418.47618.9245.7469.3480.7
G4750.22418.67319.1215.7474.3485.7
G4800.22418.8719.3185.7479.3490.7
G4850.22419.06719.5155.7484.3495.7
G4900.22419.26419.7125.7489.3500.7
G4950.22419.46119.9095.7494.3505.7
G500.1221.9452.1893.149.455.6
G5000.22419.65720.1055.7499.3510.7
G5100.22420.05120.4995.7509.3520.7
G5200.22420.44520.8935.7519.3530.7
G5300.22420.83921.2875.7529.3540.7
G5400.22421.23221.685.7539.3550.7
G550.1222.1422.3863.154.460.6
G5500.22421.62622.0745.7549.3560.7
G5600.22422.0222.4685.7559.3570.7
G5700.22422.41322.8615.7569.3580.7
G5800.22422.80723.2555.7579.3590.7
G5900.22423.20123.6495.7589.3600.7
G600.1222.3392.5833.159.465.6
G6000.22423.59424.0425.7599.3610.7
G6050.22423.79124.2395.7604.3615.7
G650.1222.5352.7793.164.470.6
G700.1222.7322.9763.169.475.6
G750.1222.9293.1733.174.480.6
G800.1223.1263.373.179.485.6
G850.1223.3233.5673.184.490.6
G8600.22433.83134.2795.7859.3870.7
G900.1223.523.7643.189.495.6
G9100.22435.79936.2475.7909.3920.7
G950.1223.7173.9613.194.4100.6
GM0050.1970.1970.5915515
GM0100.1970.3940.78851020
GM0150.1970.5910.98551525
GM0200.1970.7871.18152030
GM0250.1970.9841.37852535
GM0300.1971.1811.57553040
GM0350.1971.3781.77253545
GM0400.1971.5751.96954050
GM0450.1971.7722.16654555
GM0500.1971.9692.36355060
GM0550.1972.1652.55955565
GM0600.1972.3622.75656070
GM0650.1972.5592.95356575
GM0700.1972.7563.1557080
GM0750.1972.9533.34757585
GM0800.1973.153.54458090
GM0850.1973.3463.7458595
GM0900.1973.5433.937590100
GM0950.1973.744.134595105
GM1000.1973.9374.3315100110
GM1050.1974.1344.5285105115
GM1100.1974.3314.7255110120
GM1150.1974.5284.9225115125
GM1200.1974.7245.1185120130
GM1250.1974.9215.3155125135
GM1300.1975.1185.5125130140
GM1350.1975.3155.7095135145
GM1400.1975.5125.9065140150
GM1450.1975.7096.1035145155
GM1500.1975.9066.35150160
GM1550.1976.1026.4965155165
GM1600.1976.2996.6935160170
GM1650.1976.4966.895165175
GM1700.1976.6937.0875170180
GM1750.1976.897.2845175185
GM1800.1977.0877.4815180190
GM1850.1977.2837.6775185195
GM1900.1977.487.8745190200
GM1950.1977.6778.0715195205
GM2000.1977.8748.2685200210
GM2050.1978.0718.4655205215
GM2100.1978.2688.6625210220
GM2150.1978.4658.8595215225
GM2200.1978.6619.0555220230
GM2250.1978.8589.2525225235
GM2300.1979.0559.4495230240
GM2350.1979.2529.6465235245
GM2400.1979.4499.8435240250
GM2450.1979.64610.045245255
GM2500.1979.84310.2375250260
GM2550.19710.03910.4335255265
GM2600.19710.23610.635260270
GM2650.19710.43310.8275265275
GM2700.19710.6311.0245270280
GM2750.19710.82711.2215275285
GM2800.19711.02411.4185280290
GM2850.19711.2211.6145285295
GM2900.19711.41711.8115290300
GM2950.19711.61412.0085295305
GM3000.19711.81112.2055300310
GS1500.1225.8786.1223.1149.3155.5
GS1550.1226.0756.3193.1154.3160.5
GS1600.1226.2726.5163.1159.3165.5
GS1650.1226.4686.7123.1164.3170.5
GS1700.1226.6656.9093.1169.3175.5
GS1750.1226.8627.1063.1174.3180.5
GS1800.1227.0597.3033.1179.3185.5
GS1850.1227.2567.53.1184.3190.5
GS1900.1227.4537.6973.1189.3195.5
GS1950.1227.657.8943.1194.3200.5
GS2000.1227.8468.093.1199.3205.5
GS2050.1228.0438.2873.1204.3210.5
GS2100.1228.248.4843.1209.3215.5
GS2150.1228.4378.6813.1214.3220.5
GS2200.1228.6348.8783.1219.3225.5
GS2250.1228.8319.0753.1224.3230.5
GS2300.1229.0289.2723.1229.3235.5
GS2350.1229.2249.4683.1234.3240.5
GS2400.1229.4219.6653.1239.3245.5
GS2450.1229.6189.8623.1244.3250.5
GS2500.1229.81510.0593.1249.3255.5
GS2550.12210.01210.2563.1254.3260.5
GS2600.12210.20910.4533.1259.3265.5
GS2650.12210.40510.6493.1264.3270.5
GS2700.12210.60210.8463.1269.3275.5
GS2750.12210.79911.0433.1274.3280.5
GS2800.12210.99611.243.1279.3285.5
GS2850.12211.19311.4373.1284.3290.5
GS2900.12211.3911.6343.1289.3295.5
GS2950.12211.58711.8313.1294.3300.5
GS3000.12211.78312.0273.1299.3305.5
GS3050.12211.9812.2243.1304.3310.5
GS3100.12212.17712.4213.1309.3315.5
GS3150.12212.37412.6183.1314.3320.5
GS3200.12212.57112.8153.1319.3325.5
GS3250.12212.76813.0123.1324.3330.5
GS3300.12212.96513.2093.1329.3335.5
GS3350.12213.16113.4053.1334.3340.5
GS3400.12213.35813.6023.1339.3345.5
GS3450.12213.55513.7993.1344.3350.5
GS3500.12213.75213.9963.1349.3355.5
GS3550.12213.94914.1933.1354.3360.5
GS3600.12214.14614.393.1359.3365.5
GS3650.12214.34214.5863.1364.3370.5
GS3700.12214.53914.7833.1369.3375.5
GS3750.12214.73614.983.1374.3380.5
GS3800.12214.93315.1773.1379.3385.5
GS3850.12215.1315.3743.1384.3390.5
GS3900.12215.32715.5713.1389.3395.5
GS3950.12215.52415.7683.1394.3400.5
GS4000.12215.7215.9643.1399.3405.5
P100.0750.3860.5361.99.813.6
P1000.2243.9214.3695.799.6111
P10000.33139.3539.358.4999.51016.3
P1020.22444.4485.7101.6113
P1050.2244.1184.5665.7104.6116
P10A0.0940.3860.5742.49.814.6
P110.0940.4250.6132.410.815.6
P11.20.0940.4330.6212.41115.8
P1100.2244.3154.7635.7109.6121
P1120.2244.3944.8425.7111.6123
P1150.2244.5124.965.7114.6126
P120.0940.4650.6532.411.816.6
P12.50.0940.4840.6722.412.317.1
P1200.2244.7095.1575.7119.6131
P1250.2244.9065.3545.7124.6136
P1300.2245.1025.555.7129.6141
P1320.2245.1815.6295.7131.6143
P1350.2245.2995.7475.7134.6146
P140.0940.5430.7312.413.818.6
P1400.2245.4965.9445.7139.6151
P1450.2245.6936.1415.7144.6156
P150.0940.5830.7712.414.819.6
P1500.2245.896.3385.7149.6161
P150A0.3315.8866.5488.4149.5166.3
P1550.3316.0836.7458.4154.5171.3
P160.0940.6220.812.415.820.6
P1600.3316.286.9428.4159.5176.3
P1650.3316.4767.1388.4164.5181.3
P1700.3316.6737.3358.4169.5186.3
P1750.3316.877.5328.4174.5191.3
P180.0940.7010.8892.417.822.6
P1800.3317.0677.7298.4179.5196.3
P1850.3317.2647.9268.4184.5201.3
P1900.3317.4618.1238.4189.5206.3
P1950.3317.6578.3198.4194.5211.3
P200.0940.780.9682.419.824.6
P2000.3317.8548.5168.4199.5216.3
P2050.3318.0518.7138.4204.5221.3
P2090.3318.2098.8718.4208.5225.3
P210.0940.8191.0072.420.825.6
P2100.3318.2488.918.4209.5226.3
P2150.3318.4459.1078.4214.5231.3
P220.0940.8581.0462.421.826.6
P22.40.1380.871.1463.522.129.1
P2200.3318.6429.3048.4219.5236.3
P2250.3318.8399.5018.4224.5241.3
P22A0.1380.8541.133.521.728.7
P2300.3319.0359.6978.4229.5246.3
P2350.3319.2329.8948.4234.5251.3
P240.1380.9331.2093.523.730.7
P2400.3319.42910.0918.4239.5256.3
P2450.3319.62610.2888.4244.5261.3
P250.1380.9721.2483.524.731.7
P25.50.1380.9921.2683.525.232.2
P2500.3319.82310.4858.4249.5266.3
P2550.33110.0210.6828.4254.5271.3
P260.1381.0121.2883.525.732.7
P2600.33110.21710.8798.4259.5276.3
P2650.33110.41311.0758.4264.5281.3
P2700.33110.6111.2728.4269.5286.3
P2750.33110.80711.4698.4274.5291.3
P280.1381.0911.3673.527.734.7
P2800.33111.00411.6668.4279.5296.3
P2850.33111.20111.8638.4284.5301.3
P290.1381.131.4063.528.735.7
P29.50.1381.151.4263.529.236.2
P2900.33111.39812.068.4289.5306.3
P2950.33111.59412.2568.4294.5311.3
P30.0750.110.261.92.86.6
P300.1381.1691.4453.529.736.7
P3000.33111.79111.7918.4299.5316.3
P3050.33111.98811.9888.4304.5321.3
P310.1381.2091.4853.530.737.7
P31.50.1381.2281.5043.531.238.2
P3100.33112.18512.1858.4309.5326.3
P3150.33112.38212.3828.4314.5331.3
P320.1381.2481.5243.531.738.7
P3200.33112.57912.5798.4319.5336.3
P3250.33112.77612.7768.4324.5341.3
P3300.33112.97212.9728.4329.5346.3
P3350.33113.16913.1698.4334.5351.3
P340.1381.3271.6033.533.740.7
P3400.33113.36613.3668.4339.5356.3
P3450.33113.56313.5638.4344.5361.3
P350.1381.3661.6423.534.741.7
P35.50.1381.3861.6623.535.242.2
P3500.33113.7613.768.4349.5366.3
P3550.33113.95713.9578.4354.5371.3
P360.1381.4061.6823.535.742.7
P3600.33114.15414.1548.4359.5376.3
P3650.33114.3514.358.4364.5381.3
P3700.33114.54714.5478.4369.5386.3
P3750.33114.74414.7448.4374.5391.3
P380.1381.4841.763.537.744.7
P3800.33114.94114.9418.4379.5396.3
P3850.33115.13815.1388.4384.5401.3
P390.1381.5241.83.538.745.7
P3900.33115.33515.3358.4389.5406.3
P3950.33115.53115.5318.4394.5411.3
P40.0750.150.31.93.87.6
P400.1381.5631.8393.539.746.7
P4000.33115.72815.7288.4399.5416.3
P4050.33115.92515.9258.4404.5421.3
P410.1381.6021.8783.540.747.7
P4100.33116.12216.1228.4409.5426.3
P4150.33116.31916.3198.4414.5431.3
P420.1381.6421.9183.541.748.7
P4200.33116.51616.5168.4419.5436.3
P4250.33116.71316.7138.4424.5441.3
P4300.33116.90916.9098.4429.5446.3
P4350.33117.10617.1068.4434.5451.3
P440.1381.721.9963.543.750.7
P4400.33117.30317.3038.4439.5456.3
P4450.33117.517.58.4444.5461.3
P450.1381.762.0363.544.751.7
P4500.33117.69717.6978.4449.5466.3
P4550.33117.89417.8948.4454.5471.3
P460.1381.7992.0753.545.752.7
P4600.33118.09118.0918.4459.5476.3
P4650.33118.28718.2878.4464.5481.3
P4700.33118.48418.4848.4469.5486.3
P4750.33118.68118.6818.4474.5491.3
P480.1381.8782.1543.547.754.7
P4800.33118.87818.8788.4479.5496.3
P4850.33119.07519.0758.4484.5501.3
P48A0.2241.8742.3225.747.659
P490.1381.9172.1933.548.755.7
P4900.33119.27219.2728.4489.5506.3
P4950.33119.46819.4688.4494.5511.3
P50.0750.1890.3391.94.88.6
P500.1381.9572.2333.549.756.7
P5000.33119.66519.6658.4499.5516.3
P50A0.2241.9532.4015.749.661
P520.2242.0312.4795.751.663
P530.2242.0712.5195.752.664
P550.2242.152.5985.754.666
P560.2242.1892.6375.755.667
P580.2242.2682.7165.757.669
P5900.33123.20923.2098.4589.5606.3
P60.0750.2280.3781.95.89.6
P600.2242.3462.7945.759.671
P6000.33123.60223.6028.4599.5616.3
P6100.33123.99623.9968.4609.5626.3
P620.2242.4252.8735.761.673
P6200.33124.3924.398.4619.5636.3
P6250.33124.58724.5878.4624.5641.3
P630.2242.4652.9135.762.674
P6350.33124.9824.988.4634.5651.3
P650.2242.5432.9915.764.676
P6500.33125.57125.5718.4649.5666.3
P670.2242.6223.075.766.678
P6800.33126.75226.7528.4679.5696.3
P6900.33127.14627.1468.4689.5706.3
P70.0750.2680.4181.96.810.6
P700.2242.743.1885.769.681
P7000.33127.53927.5398.4699.5716.3
P710.2242.783.2285.770.682
P7100.33127.93327.9338.4709.5726.3
P7200.33128.32728.3278.4719.5736.3
P7300.33128.7228.728.4729.5746.3
P7400.33129.11429.1148.4739.5756.3
P750.2242.9373.3855.774.686
P7500.33129.50829.5088.4749.5766.3
P7600.33129.90229.9028.4759.5776.3
P7700.33130.29530.2958.4769.5786.3
P7800.33130.68930.6898.4779.5796.3
P7900.33131.08331.0838.4789.5806.3
P80.0750.3070.4571.97.811.6
P800.2243.1343.5825.779.691
P8000.33131.47631.4768.4799.5816.3
P8100.33131.8731.878.4809.5826.3
P8200.33132.26432.2648.4819.5836.3
P8300.33132.65732.6578.4829.5846.3
P8400.33133.05133.0518.4839.5856.3
P850.2243.3313.7795.784.696
P8500.33133.44533.4458.4849.5866.3
P8600.33133.83933.8398.4859.5876.3
P8700.33134.23234.2328.4869.5886.3
P8800.33134.62634.6268.4879.5896.3
P8900.33135.0235.028.4889.5906.3
P90.0750.3460.4961.98.812.6
P900.2243.5283.9765.789.6101
P9000.33135.41335.4138.4899.5916.3
P9100.33135.80735.8078.4909.5926.3
P9150.33136.00436.0048.4914.5931.3
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V7400.39428.83929.62710732.5752.5
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V850.1573.3073.62148492
V9500.39437.02837.81610940.5960.5
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Types of O-Rings

AS-568

Major O-ring manufacturers follow the AS568B standard …

BS-1806

British Standard or BS standard includes all sizes in…

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