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. EP is also known as: Eythylene Propylene, EPR, EPDM, EPT, E.

EP is an elastomer which is characterized by wide range of applications and good chemical resistance. Ethylene propylene compounds have good resistance to detergents, alkalis, mild acids, greases, silicone oils, and alcohols.

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Inside Diamter (in)

Inside Diamter (mm)

Cross Section Width (in)

Cross Section Width (mm)

Item #

Inside Diamter

Cross Section Width

Durometer

CSW Tolerance

BS Number

BS903 EP-70 N/A 0.301 in7.65 mm N/A 0.064 in1.63 mm N/A 70 N/A 0.003 in0.08 mm N/A -903
BS902 EP-70 N/A 0.239 in6.07 mm N/A 0.064 in1.63 mm N/A 70 N/A 0.003 in0.08 mm N/A -902
BS886 EP-70 N/A 7.875 in200.03 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -886
BS884 EP-70 N/A 7.625 in193.68 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -884
BS882 EP-70 N/A 7.375 in187.33 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -882
BS880 EP-70 N/A 7.125 in180.98 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -880
BS878 EP-70 N/A 6.875 in174.63 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -878
BS876 EP-70 N/A 6.625 in168.28 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -876
BS874 EP-70 N/A 6.375 in161.93 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -874
BS872 EP-70 N/A 6.125 in155.58 mm N/A 0.275 in6.99 mm N/A 70 N/A 0.006 in0.15 mm N/A -872
BS870 EP-70 N/A 5.875 in149.23 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -870
BS869 EP-70 N/A 5.75 in146.05 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -869
BS868 EP-70 N/A 5.625 in142.88 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -868
BS867 EP-70 N/A 5.5 in139.70 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -867
BS866 EP-70 N/A 5.375 in136.53 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -866
BS865 EP-70 N/A 5.25 in133.35 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -865
BS864 EP-70 N/A 5.125 in130.18 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -864
BS863 EP-70 N/A 5.000 in127.00 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -863
BS862 EP-70 N/A 4.875 in123.83 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -862
BS861 EP-70 N/A 4.75 in120.65 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -861
BS860 EP-70 N/A 4.625 in117.48 mm N/A 0.210 in5.33 mm N/A 70 N/A 0.005 in0.13 mm N/A -860
BS846 EP-70 N/A 2.937 in74.60 mm N/A 0.139 in3.53 mm N/A 70 N/A 0.004 in0.10 mm N/A -846
BS845 EP-70 N/A 2.875 in73.03 mm N/A 0.139 in3.53 mm N/A 70 N/A 0.004 in0.10 mm N/A -845
BS844 EP-70 N/A 2.813 in71.44 mm N/A 0.139 in3.53 mm N/A 70 N/A 0.004 in0.10 mm N/A -844
BS843 EP-70 N/A 2.75 in69.85 mm N/A 0.139 in3.53 mm N/A 70 N/A 0.004 in0.10 mm N/A -843
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