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)

Durometer

Inside Diameter (in)

Inside Diameter (mm)

Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

BS Number

N/A
186508
N/A BS Standard O-Ring N/A AFLAS N/A 0.064 in N/A 75 N/A 0.301 in7.65 mm N/A 0.003 in0.08 mm N/A -903
N/A
186509
N/A BS Standard O-Ring N/A AFLAS N/A 0.064 in N/A 75 N/A 0.239 in6.07 mm N/A 0.003 in0.08 mm N/A -902
N/A
186510
N/A BS Standard O-Ring N/A AFLAS N/A 0.275 in N/A 75 N/A 7.875 in200.03 mm N/A 0.006 in0.15 mm N/A -886
N/A
186511
N/A BS Standard O-Ring N/A AFLAS N/A 0.275 in N/A 75 N/A 7.625 in193.68 mm N/A 0.006 in0.15 mm N/A -884
N/A
186512
N/A BS Standard O-Ring N/A AFLAS N/A 0.275 in N/A 75 N/A 7.375 in187.33 mm N/A 0.006 in0.15 mm N/A -882
N/A
186513
N/A BS Standard O-Ring N/A AFLAS N/A 0.275 in N/A 75 N/A 7.125 in180.98 mm N/A 0.006 in0.15 mm N/A -880
N/A
186514
N/A BS Standard O-Ring N/A AFLAS N/A 0.275 in N/A 75 N/A 6.875 in174.63 mm N/A 0.006 in0.15 mm N/A -878
N/A
186515
N/A BS Standard O-Ring N/A AFLAS N/A 0.275 in N/A 75 N/A 6.625 in168.28 mm N/A 0.006 in0.15 mm N/A -876
N/A
186516
N/A BS Standard O-Ring N/A AFLAS N/A 0.275 in N/A 75 N/A 6.375 in161.93 mm N/A 0.006 in0.15 mm N/A -874
N/A
186517
N/A BS Standard O-Ring N/A AFLAS N/A 0.275 in N/A 75 N/A 6.125 in155.58 mm N/A 0.006 in0.15 mm N/A -872
N/A
186518
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 5.875 in149.23 mm N/A 0.005 in0.13 mm N/A -870
N/A
186519
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 5.75 in146.05 mm N/A 0.005 in0.13 mm N/A -869
N/A
186520
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 5.625 in142.88 mm N/A 0.005 in0.13 mm N/A -868
N/A
186521
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 5.5 in139.70 mm N/A 0.005 in0.13 mm N/A -867
N/A
186522
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 5.375 in136.53 mm N/A 0.005 in0.13 mm N/A -866
N/A
186523
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 5.25 in133.35 mm N/A 0.005 in0.13 mm N/A -865
N/A
186524
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 5.125 in130.18 mm N/A 0.005 in0.13 mm N/A -864
N/A
186525
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 5.000 in127.00 mm N/A 0.005 in0.13 mm N/A -863
N/A
186526
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 4.875 in123.83 mm N/A 0.005 in0.13 mm N/A -862
N/A
186527
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 4.75 in120.65 mm N/A 0.005 in0.13 mm N/A -861
N/A
186528
N/A BS Standard O-Ring N/A AFLAS N/A 0.210 in N/A 75 N/A 4.625 in117.48 mm N/A 0.005 in0.13 mm N/A -875
N/A
186529
N/A BS Standard O-Ring N/A AFLAS N/A 0.139 in N/A 75 N/A 2.937 in74.60 mm N/A 0.004 in0.10 mm N/A -846
N/A
186530
N/A BS Standard O-Ring N/A AFLAS N/A 0.139 in N/A 75 N/A 2.875 in73.03 mm N/A 0.004 in0.10 mm N/A -845
N/A
186531
N/A BS Standard O-Ring N/A AFLAS N/A 0.139 in N/A 75 N/A 2.813 in71.44 mm N/A 0.004 in0.10 mm N/A -844
N/A
186532
N/A BS Standard O-Ring N/A AFLAS N/A 0.139 in N/A 75 N/A 2.75 in69.85 mm N/A 0.004 in0.10 mm N/A -843
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