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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.

This elastomer is a copolymer of Tetrafluoroethylene (TFE) and propylene. Its chemical resistance is excellent across a wide range of aggressive media.For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
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Cross Section Width (in)

Cross Section Width (mm)

Durometer

Inside Diameter (in)

Inside Diameter (mm)

Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

BS Number

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BS903 AFLAS-75 N/A
186508
N/A BS Standard O-Ring N/A Aflas N/A 0.064 in1.63 mm N/A 75 N/A 0.30 in7.65 mm N/A 0.003 in0.08 mm N/A -903 N/A
BS902 AFLAS-75 N/A
186509
N/A BS Standard O-Ring N/A Aflas N/A 0.064 in1.63 mm N/A 75 N/A 0.24 in6.07 mm N/A 0.003 in0.08 mm N/A -902 N/A
BS886 AFLAS-75 N/A
186510
N/A BS Standard O-Ring N/A Aflas N/A 0.275 in6.99 mm N/A 75 N/A 7.88 in200.03 mm N/A 0.006 in0.15 mm N/A -886 N/A
BS884 AFLAS-75 N/A
186511
N/A BS Standard O-Ring N/A Aflas N/A 0.275 in6.99 mm N/A 75 N/A 7.63 in193.68 mm N/A 0.006 in0.15 mm N/A -884 N/A
BS882 AFLAS-75 N/A
186512
N/A BS Standard O-Ring N/A Aflas N/A 0.275 in6.99 mm N/A 75 N/A 7.38 in187.33 mm N/A 0.006 in0.15 mm N/A -882 N/A
BS880 AFLAS-75 N/A
186513
N/A BS Standard O-Ring N/A Aflas N/A 0.275 in6.99 mm N/A 75 N/A 7.13 in180.98 mm N/A 0.006 in0.15 mm N/A -880 N/A
BS878 AFLAS-75 N/A
186514
N/A BS Standard O-Ring N/A Aflas N/A 0.275 in6.99 mm N/A 75 N/A 6.88 in174.63 mm N/A 0.006 in0.15 mm N/A -878 N/A
BS876 AFLAS-75 N/A
186515
N/A BS Standard O-Ring N/A Aflas N/A 0.275 in6.99 mm N/A 75 N/A 6.63 in168.28 mm N/A 0.006 in0.15 mm N/A -876 N/A
BS874 AFLAS-75 N/A
186516
N/A BS Standard O-Ring N/A Aflas N/A 0.275 in6.99 mm N/A 75 N/A 6.38 in161.93 mm N/A 0.006 in0.15 mm N/A -874 N/A
BS872 AFLAS-75 N/A
186517
N/A BS Standard O-Ring N/A Aflas N/A 0.275 in6.99 mm N/A 75 N/A 6.13 in155.58 mm N/A 0.006 in0.15 mm N/A -872 N/A
BS870 AFLAS-75 N/A
186518
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 5.88 in149.23 mm N/A 0.005 in0.13 mm N/A -870 N/A
BS869 AFLAS-75 N/A
186519
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 5.75 in146.05 mm N/A 0.005 in0.13 mm N/A -869 N/A
BS868 AFLAS-75 N/A
186520
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 5.63 in142.88 mm N/A 0.005 in0.13 mm N/A -868 N/A
BS867 AFLAS-75 N/A
186521
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 5.50 in139.70 mm N/A 0.005 in0.13 mm N/A -867 N/A
BS866 AFLAS-75 N/A
186522
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 5.38 in136.53 mm N/A 0.005 in0.13 mm N/A -866 N/A
BS865 AFLAS-75 N/A
186523
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 5.25 in133.35 mm N/A 0.005 in0.13 mm N/A -865 N/A
BS864 AFLAS-75 N/A
186524
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 5.13 in130.18 mm N/A 0.005 in0.13 mm N/A -864 N/A
BS863 AFLAS-75 N/A
186525
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 5.00 in127.00 mm N/A 0.005 in0.13 mm N/A -863 N/A
BS862 AFLAS-75 N/A
186526
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 4.88 in123.83 mm N/A 0.005 in0.13 mm N/A -862 N/A
BS861 AFLAS-75 N/A
186527
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 4.75 in120.65 mm N/A 0.005 in0.13 mm N/A -861 N/A
BS875 AFLAS-75 N/A
186528
N/A BS Standard O-Ring N/A Aflas N/A 0.210 in5.33 mm N/A 75 N/A 4.63 in117.48 mm N/A 0.005 in0.13 mm N/A -875 N/A
BS846 AFLAS-75 N/A
186529
N/A BS Standard O-Ring N/A Aflas N/A 0.139 in3.53 mm N/A 75 N/A 2.94 in74.60 mm N/A 0.004 in0.10 mm N/A -846 N/A
BS845 AFLAS-75 N/A
186530
N/A BS Standard O-Ring N/A Aflas N/A 0.139 in3.53 mm N/A 75 N/A 2.88 in73.03 mm N/A 0.004 in0.10 mm N/A -845 N/A
BS844 AFLAS-75 N/A
186531
N/A BS Standard O-Ring N/A Aflas N/A 0.139 in3.53 mm N/A 75 N/A 2.81 in71.44 mm N/A 0.004 in0.10 mm N/A -844 N/A
BS843 AFLAS-75 N/A
186532
N/A BS Standard O-Ring N/A Aflas N/A 0.139 in3.53 mm N/A 75 N/A 2.75 in69.85 mm N/A 0.004 in0.10 mm N/A -843 N/A
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