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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. Perfluoroelastomer is also known as FKKM and Perfloro.

Parts resist over 1,800 different chemicals, while offering the high temperature stability of PTFE (327°C). They’re used in aggressive chemical processing, pharmaceutical, oil rcovery, gas recovery, and aerospace applications. The proven, long-term performance of Kalrez® parts can mean less repairs, seal changes, inspections and equipment uptime for greater productivity and yield.

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Inside Diamter (in)

Durometer

70 75 90

Cross Section Width (in)

Cross Section Width (mm)

Item #

Inside Diamter

Durometer

CSW Tolerance

BS Number

Cross Section Width

BS903 KALREZ-75 N/A 0.301 in N/A 75 N/A 0.003 in0.08 mm N/A -903 N/A 0.064 in1.63 mm
BS902 KALREZ-75 N/A 0.239 in N/A 75 N/A 0.003 in0.08 mm N/A -902 N/A 0.064 in1.63 mm
BS886 KALREZ-75 N/A 7.875 in N/A 75 N/A 0.006 in0.15 mm N/A -886 N/A 0.275 in6.99 mm
BS884 KALREZ-75 N/A 7.625 in N/A 75 N/A 0.006 in0.15 mm N/A -884 N/A 0.275 in6.99 mm
BS882 KALREZ-75 N/A 7.375 in N/A 75 N/A 0.006 in0.15 mm N/A -882 N/A 0.275 in6.99 mm
BS880 KALREZ-75 N/A 7.125 in N/A 75 N/A 0.006 in0.15 mm N/A -880 N/A 0.275 in6.99 mm
BS878 KALREZ-75 N/A 6.875 in N/A 75 N/A 0.006 in0.15 mm N/A -878 N/A 0.275 in6.99 mm
BS876 KALREZ-75 N/A 6.625 in N/A 75 N/A 0.006 in0.15 mm N/A -876 N/A 0.275 in6.99 mm
BS874 KALREZ-75 N/A 6.375 in N/A 75 N/A 0.006 in0.15 mm N/A -874 N/A 0.275 in6.99 mm
BS872 KALREZ-75 N/A 6.125 in N/A 75 N/A 0.006 in0.15 mm N/A -872 N/A 0.275 in6.99 mm
BS870 KALREZ-75 N/A 5.875 in N/A 75 N/A 0.005 in0.13 mm N/A -870 N/A 0.210 in5.33 mm
BS869 KALREZ-75 N/A 5.75 in N/A 75 N/A 0.005 in0.13 mm N/A -869 N/A 0.210 in5.33 mm
BS868 KALREZ-75 N/A 5.625 in N/A 75 N/A 0.005 in0.13 mm N/A -868 N/A 0.210 in5.33 mm
BS867 KALREZ-75 N/A 5.5 in N/A 75 N/A 0.005 in0.13 mm N/A -867 N/A 0.210 in5.33 mm
BS866 KALREZ-75 N/A 5.375 in N/A 75 N/A 0.005 in0.13 mm N/A -866 N/A 0.210 in5.33 mm
BS865 KALREZ-75 N/A 5.25 in N/A 75 N/A 0.005 in0.13 mm N/A -865 N/A 0.210 in5.33 mm
BS864 KALREZ-75 N/A 5.125 in N/A 75 N/A 0.005 in0.13 mm N/A -864 N/A 0.210 in5.33 mm
BS863 KALREZ-75 N/A 5.000 in N/A 75 N/A 0.005 in0.13 mm N/A -863 N/A 0.210 in5.33 mm
BS862 KALREZ-75 N/A 4.875 in N/A 75 N/A 0.005 in0.13 mm N/A -862 N/A 0.210 in5.33 mm
BS861 KALREZ-75 N/A 4.75 in N/A 75 N/A 0.005 in0.13 mm N/A -861 N/A 0.210 in5.33 mm
BS875 KALREZ-75 N/A 4.625 in N/A 75 N/A 0.005 in0.13 mm N/A -875 N/A 0.210 in5.33 mm
BS846 KALREZ-75 N/A 2.937 in N/A 75 N/A 0.004 in0.10 mm N/A -846 N/A 0.139 in3.53 mm
BS845 KALREZ-75 N/A 2.875 in N/A 75 N/A 0.004 in0.10 mm N/A -845 N/A 0.139 in3.53 mm
BS844 KALREZ-75 N/A 2.813 in N/A 75 N/A 0.004 in0.10 mm N/A -844 N/A 0.139 in3.53 mm
BS843 KALREZ-75 N/A 2.75 in N/A 75 N/A 0.004 in0.10 mm N/A -843 N/A 0.139 in3.53 mm
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