British Standard O-Rings are very similar to Standard O-Rings in the fact that they are both standardized imperically. The British Standard however, incorporates some extended sizes in the 1/4" nominal cross section group for an even broader application range. British Standard O-Rings serve a variety of industries including aerospace, paint, food, and chemical transport.

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Inside Diamter (in)

Cross Section Width (in)

Cross Section Width (mm)

Item #

Inside Diamter

Cross Section Width

Durometer

CSW Tolerance

BS Number

N/A 0.301 in N/A 0.064 in1.63 mm N/A 70 N/A 0.003 in0.08 mm N/A -903
N/A 0.239 in N/A 0.064 in1.63 mm N/A 70 N/A 0.003 in0.08 mm N/A -902
N/A 7.875 in N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -886
N/A 7.625 in N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -884
N/A 7.375 in N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -882
N/A 7.125 in N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -880
N/A 6.875 in N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -878
N/A 6.625 in N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -876
N/A 6.375 in N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -874
N/A 6.125 in N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -872
N/A 5.875 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -870
N/A 5.75 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -869
N/A 5.625 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -868
N/A 5.5 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -867
N/A 5.375 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -866
N/A 5.25 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -865
N/A 5.125 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -864
N/A 5.000 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -863
N/A 4.875 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -862
N/A 4.75 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -861
N/A 4.625 in N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -875
N/A 2.937 in N/A 0.139 in3.53 mm N/A 70 N/A 0.004 in0.10 mm N/A -846
N/A 2.875 in N/A 0.139 in3.53 mm N/A 70 N/A 0.004 in0.10 mm N/A -845
N/A 2.813 in N/A 0.139 in3.53 mm N/A 70 N/A 0.004 in0.10 mm N/A -844
N/A 2.75 in N/A 0.139 in3.53 mm N/A 70 N/A 0.004 in0.10 mm N/A -843
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