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 possesses mechanical properties similar to Viton®, with the exception of its slightly lower compression set resistance. It is more suitable for sensitive applications where lighter compressive forces are applied to energize the seal. This core has a Shore A hardness of 70 but it also offers a broader operating temperature range of -80°F to +500°F. (-62°C to +260°C). 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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O-Ring Industries

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N/A
186122
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.703 in17.86 mm N/A 0.003 in0.08 mm N/A -617 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186092
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.687 in17.45 mm N/A 0.003 in0.08 mm N/A -810 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186484
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.676 in17.17 mm N/A 0.003 in0.08 mm N/A -017 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186437
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.674 in17.12 mm N/A 0.003 in0.08 mm N/A -115 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186365
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.672 in17.07 mm N/A 0.004 in0.10 mm N/A -209 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186288
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 0.662 in16.81 mm N/A 0.005 in0.13 mm N/A -313 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186093
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.625 in15.88 mm N/A 0.003 in0.08 mm N/A -809 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186485
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.614 in15.6 mm N/A 0.003 in0.08 mm N/A -016 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186438
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.612 in15.54 mm N/A 0.003 in0.08 mm N/A -114 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186366
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.609 in15.47 mm N/A 0.004 in0.10 mm N/A -208 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186289
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 0.600 in15.24 mm N/A 0.005 in0.13 mm N/A -312 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186123
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.594 in15.09 mm N/A 0.003 in0.08 mm N/A -616 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186486
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.551 in14.00 mm N/A 0.003 in0.08 mm N/A -015 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186439
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.549 in13.94 mm N/A 0.003 in0.08 mm N/A -113 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186367
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.549 in13.94 mm N/A 0.004 in0.10 mm N/A -207 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186290
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 0.537 in13.64 mm N/A 0.005 in0.13 mm N/A -311 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186124
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.516 in13.11 mm N/A 0.003 in0.08 mm N/A -615 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186094
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.500 in12.70 mm N/A 0.003 in0.08 mm N/A -807 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186487
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.489 in12.42 mm N/A 0.003 in0.08 mm N/A -014 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186440
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.487 in12.37 mm N/A 0.003 in0.08 mm N/A -112 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186368
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.484 in12.29 mm N/A 0.004 in0.10 mm N/A -206 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186291
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 0.475 in12.07 mm N/A 0.005 in0.13 mm N/A -310 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186125
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.469 in11.91 mm N/A 0.003 in0.08 mm N/A -614 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186095
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.437 in11.10 mm N/A 0.003 in0.08 mm N/A -806 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186488
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.426 in10.82 mm N/A 0.003 in0.08 mm N/A -013 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
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