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DIN 3771 Metric O-Rings

DIN 3771 Metric O-Rings

The DIN 3771 o-ring standard is issued by The German Institute for Standards (Duetsches Institut für Normung). This standard identifies O-Ring sizes by the ID x C/S, and may be followed by a letter indicating the quality level (N – normal quality; S – special quality), and a code indicating the rubber polymer and IRHD hardness.

For a complete listing of all metric o-ring sizes, visit our Metric O-Ring Cross Reference Table.

DIN 3771 Size Chart

Global Part#ReferenceC/S (MM)I.D. (MM)C/S (Inch)I.D. (Inch)
1.80X001.81.8 X 1.81.81.80.0710.071
1.80X0022 X 1.81.820.0710.079
1.80X002.242.24 X 1.81.82.240.0710.088
1.80X002.52.5 X 1.81.82.50.0710.098
1.80X002.82.8 X 1.81.82.80.0710.11
1.80X003.153.15 X 1.81.83.150.0710.124
1.80X003.553.55 X 1.81.83.550.0710.14
1.80X003.753.75 X 1.81.83.750.0710.148
1.80X0044 X 1.81.840.0710.157
1.80X004.54.5 X 1.81.84.50.0710.177
1.80X004.874.87 X 1.81.84.870.0710.192
1.80X0055 X 1.81.850.0710.197
1.80X005.155.15 X 1.81.85.150.0710.203
1.80X005.35.3 X 1.81.85.30.0710.209
1.80X005.65.6 X 1.81.85.60.0710.22
1.80X0066 X 1.81.860.0710.236
1.80X006.36.3 X 1.81.86.30.0710.248
1.80X006.76.7 X 1.81.86.70.0710.264
1.80X006.96.9 X 1.81.86.90.0710.272
1.80X007.17.1 X 1.81.87.10.0710.28
1.80X007.57.5 X 1.81.87.50.0710.295
1.80X0088 X 1.81.880.0710.315
1.80X008.58.5 X 1.81.88.50.0710.335
1.80X008.758.75 X 1.81.88.750.0710.344
1.80X0099 X 1.81.890.0710.354
1.80X009.59.5 X 1.81.89.50.0710.374
1.80X01010 X 1.81.8100.0710.394
1.80X010.610.6 X 1.81.810.60.0710.417
1.80X011.211.2 X 1.81.811.20.0710.441
1.80X011.811.8 X 1.81.811.80.0710.465
1.80X012.512.5 X 1.81.812.50.0710.492
1.80X013.213.2 X 1.81.813.20.0710.52
1.80X01414 X 1.81.8140.0710.551
1.80X01515 X 1.81.8150.0710.591
1.80X01616 X 1.81.8160.0710.63
1.80X01717 X 1.81.8170.0710.669
2.65X01414 X 2.652.65140.1040.551
2.65X01515 X 2.652.65150.1040.591
2.65X01616 X 2.652.65160.1040.63
2.65X01717 X 2.652.65170.1040.669
2.65X01818 X 2.652.65180.1040.709
2.65X01919 X 2.652.65190.1040.748
2.65X02020 X 2.652.65200.1040.787
2.65X021.221.2 X 2.652.6521.20.1040.835
2.65X022.422.4 X 2.652.6522.40.1040.882
2.65X023.623.6 X 2.652.6523.60.1040.929
2.65X02525 X 2.652.65250.1040.984
2.65X025.825.8 X 2.652.6525.80.1041.016
2.65X026.526.5 X 2.652.6526.50.1041.043
2.65X02828 X 2.652.65280.1041.102
2.65X03030 X 2.652.65300.1041.181
2.65X031.531.5 X 2.652.6531.50.1041.24
2.65X032.532.5 X 2.652.6532.50.1041.28
2.65X033.533.5 X 2.652.6533.50.1041.319
2.65X034.534.5 X 2.652.6534.50.1041.358
2.65X035.535.5 X 2.652.6535.50.1041.398
2.65X036.536.5 X 2.652.6536.50.1041.437
2.65X037.537.5 X 2.652.6537.50.1041.476
2.65X038.738.7 X 2.652.6538.70.1041.524
3.55X01818 X 3.553.55180.140.709
3.55X01919 X 3.553.55190.140.748
3.55X02020 X 3.553.55200.140.787
3.55X021.221.2 X 3.553.5521.20.140.835
3.55X022.422.4 X 3.553.5522.40.140.882
3.55X023.623.6 X 3.553.5523.60.140.929
3.55X02525 X 3.553.55250.140.984
3.55X025.825.8 X 3.553.5525.80.141.016
3.55X026.526.5 X 3.553.5526.50.141.043
3.55X02828 X 3.553.55280.141.102
3.55X03030 X 3.553.55300.141.181
3.55X031.531.5 X 3.553.5531.50.141.24
3.55X032.532.5 X 3.553.5532.50.141.28
3.55X033.533.5 X 3.553.5533.50.141.319
3.55X034.534.5 X 3.553.5534.50.141.358
3.55X035.535.5 X 3.553.5535.50.141.398
3.55X036.536.5 X 3.553.5536.50.141.437
3.55X037.537.5 X 3.553.5537.50.141.476
3.55X038.738.7 X 3.553.5538.70.141.524
3.55X04040 X 3.553.55400.141.575
3.55X041.241.2 X 3.553.5541.20.141.622
3.55X042.542.5 X 3.553.5542.50.141.673
3.55X043.743.7 X 3.553.5543.70.141.72
3.55X04545 X 3.553.55450.141.772
3.55X046.246.2 X 3.553.5546.20.141.819
3.55X047.547.5 X 3.553.5547.50.141.87
3.55X048.748.7 X 3.553.5548.70.141.917
3.55X05050 X 3.553.55500.141.969
3.55X051.551.5 X 3.553.5551.50.142.028
3.55X05353 X 3.553.55530.142.087
3.55X054.554.5 X 3.553.5554.50.142.146
3.55X05656 X 3.553.55560.142.205
3.55X05858 X 3.553.55580.142.283
3.55X06060 X 3.553.55600.142.362
3.55X061.561.5 X 3.553.5561.50.142.421
3.55X06363 X 3.553.55630.142.48
3.55X06565 X 3.553.55650.142.559
3.55X06767 X 3.553.55670.142.638
3.55X06969 X 3.553.55690.142.717
3.55X07171 X 3.553.55710.142.795
3.55X07373 X 3.553.55730.142.874
3.55X07575 X 3.553.55750.142.953
3.55X077.577.5 X 3.553.5577.50.143.051
3.55X08080 X 3.553.55800.143.15
3.55X082.582.5 X 3.553.5582.50.143.248
3.55X08585 X 3.553.55850.143.346
3.55X087.587.5 X 3.553.5587.50.143.445
3.55X09090 X 3.553.55900.143.543
3.55X092.592.5 X 3.553.5592.50.143.642
3.55X09595 X 3.553.55950.143.74
3.55X097.597.5 X 3.553.5597.50.143.839
3.55X100100 X 3.553.551000.143.937
3.55X103103 X 3.553.551030.144.055
3.55X106106 X 3.553.551060.144.173
3.55X109109 X 3.553.551090.144.291
3.55X112112 X 3.553.551120.144.409
3.55X115115 X 3.553.551150.144.528
3.55X118118 X 3.553.551180.144.646
3.55X122122 X 3.553.551220.144.803
3.55X125125 X 3.553.551250.144.921
3.55X128128 X 3.553.551280.145.039
3.55X132132 X 3.553.551320.145.197
3.55X136136 X 3.553.551360.145.354
3.55X140140 X 3.553.551400.145.512
3.55X145145 X 3.553.551450.145.709
3.55X150150 X 3.553.551500.145.906
3.55X155155 X 3.553.551550.146.102
3.55X160160 X 3.553.551600.146.299
3.55X165165 X 3.553.551650.146.496
3.55X170170 X 3.553.551700.146.693
3.55X175175 X 3.553.551750.146.89
3.55X180180 X 3.553.551800.147.087
3.55X185185 X 3.553.551850.147.283
3.55X190190 X 3.553.551900.147.48
3.55X195195 X 3.553.551950.147.677
3.55X200200 X 3.553.552000.147.874
5.30X04040 X 5.35.3400.2091.575
5.30X041.241.2 X 5.35.341.20.2091.622
5.30X042.542.5 X 5.35.342.50.2091.673
5.30X043.743.7 X 5.35.343.70.2091.72
5.30X04545 X 5.35.3450.2091.772
5.30X046.246.2 X 5.35.346.20.2091.819
5.30X047.547.5 X 5.35.347.50.2091.87
5.30X048.748.7 X 5.35.348.70.2091.917
5.30X05050 X 5.35.3500.2091.969
5.30X051.551.5 X 5.35.351.50.2092.028
5.30X05353 X 5.35.3530.2092.087
5.30X054.554.5 X 5.35.354.50.2092.146
5.30X05656 X 5.35.3560.2092.205
5.30X05858 X 5.35.3580.2092.283
5.30X06060 X 5.35.3600.2092.362
5.30X061.561.5 X 5.35.361.50.2092.421
5.30X06363 X 5.35.3630.2092.48
5.30X06565 X 5.35.3650.2092.559
5.30X06767 X 5.35.3670.2092.638
5.30X06969 X 5.35.3690.2092.717
5.30X07171 X 5.35.3710.2092.795
5.30X07373 X 5.35.3730.2092.874
5.30X07575 X 5.35.3750.2092.953
5.30X077.577.5 X 5.35.377.50.2093.051
5.30X08080 X 5.35.3800.2093.15
5.30X082.582.5 X 5.35.382.50.2093.248
5.30X08585 X 5.35.3850.2093.346
5.30X087.587.5 X 5.35.387.50.2093.445
5.30X09090 X 5.35.3900.2093.543
5.30X092.592.5 X 5.35.392.50.2093.642
5.30X09595 X 5.35.3950.2093.74
5.30X097.597.5 X 5.35.397.50.2093.839
5.30X100100 X 5.35.31000.2093.937
5.30X103103 X 5.35.31030.2094.055
5.30X106106 X 5.35.31060.2094.173
5.30X109109 X 5.35.31090.2094.291
5.30X112112 X 5.35.31120.2094.409
5.30X115115 X 5.35.31150.2094.528
5.30X118118 X 5.35.31180.2094.646
5.30X122122 X 5.35.31220.2094.803
5.30X125125 X 5.35.31250.2094.921
5.30X128128 X 5.35.31280.2095.039
5.30X132132 X 5.35.31320.2095.197
5.30X136136 X 5.35.31360.2095.354
5.30X140140 X 5.35.31400.2095.512
5.30X145145 X 5.35.31450.2095.709
5.30X150150 X 5.35.31500.2095.906
5.30X155155 X 5.35.31550.2096.102
5.30X160160 X 5.35.31600.2096.299
5.30X165165 X 5.35.31650.2096.496
5.30X170170 X 5.35.31700.2096.693
5.30X175175 X 5.35.31750.2096.89
5.30X180180 X 5.35.31800.2097.087
5.30X185185 X 5.35.31850.2097.283
5.30X190190 X 5.35.31900.2097.48
5.30X195195 X 5.35.31950.2097.677
5.30X200200 X 5.35.32000.2097.874
5.30X206206 X 5.35.32060.2098.11
5.30X212212 X 5.35.32120.2098.346
5.30X218218 X 5.35.32180.2098.583
5.30X224224 X 5.35.32240.2098.819
5.30X230230 X 5.35.32300.2099.055
5.30X236236 X 5.35.32360.2099.291
5.30X243243 X 5.35.32430.2099.567
5.30X250250 X 5.35.32500.2099.843
5.30X258258 X 5.35.32580.20910.157
5.30X265265 X 5.35.32650.20910.433
5.30X272272 X 5.35.32720.20910.709
5.30X280280 X 5.35.32800.20911.024
5.30X290290 X 5.35.32900.20911.417
5.30X300300 X 5.35.33000.20911.811
5.30X307307 X 5.35.33070.20912.087
5.30X315315 X 5.35.33150.20912.402
5.30X325325 X 5.35.33250.20912.795
5.30X335335 X 5.35.33350.20913.189
5.30X345345 X 5.35.33450.20913.583
5.30X355355 X 5.35.33550.20913.976
5.30X365365 X 5.35.33650.20914.37
5.30X375375 X 5.35.33750.20914.764
5.30X387387 X 5.35.33870.20915.236
5.30X400400 X 5.35.34000.20915.748
7.00X206206 X 772060.2768.11
7.00X212212 X 772120.2768.346
7.00X218218 X 772180.2768.583
7.00X224224 X 772240.2768.819
7.00X230230 X 772300.2769.055
7.00X236236 X 772360.2769.291
7.00X243243 X 772430.2769.567
7.00X250250 X 772500.2769.843
7.00X258258 X 772580.27610.157
7.00X265265 X 772650.27610.433
7.00X272272 X 772720.27610.709
7.00X280280 X 772800.27611.024
7.00X290290 X 772900.27611.417
7.00X300300 X 773000.27611.811
7.00X307307 X 773070.27612.087
7.00X315315 X 773150.27612.402
7.00X325325 X 773250.27612.795
7.00X335335 X 773350.27613.189
7.00X345345 X 773450.27613.583
7.00X355355 X 773550.27613.976
7.00X365365 X 773650.27614.37
7.00X375375 X 773750.27614.764
7.00X387387 X 773870.27615.236
7.00X400400 X 774000.27615.748
7.00X412412 X 774120.27616.22
7.00X425425 X 774250.27616.732
7.00X437437 X 774370.27617.205
7.00X450450 X 774500.27617.717
7.00X462462 X 774620.27618.189
7.00X475475 X 774750.27618.701
7.00X487487 X 774870.27619.173
7.00X500500 X 775000.27619.685
7.00X515515 X 775150.27620.276
7.00X530530 X 775300.27620.866
7.00X545545 X 775450.27621.457
7.00X560560 X 775600.27622.047
7.00X580580 X 775800.27622.835
7.00X600600 X 776000.27623.622
7.00X615615 X 776150.27624.213
7.00X630630 X 776300.27624.803
7.00X650650 X 776500.27625.591
7.00X670670 X 776700.27626.378
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