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
186129
N/A BS Standard O-Ring N/A Silicone N/A 0.040 in1.02 mm N/A 70 N/A 0.100 in2.54 mm N/A 0.003 in0.08 mm N/A -607 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186130
N/A BS Standard O-Ring N/A Silicone N/A 0.040 in1.02 mm N/A 70 N/A 0.070 in1.78 mm N/A 0.003 in0.08 mm N/A -606 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186499
N/A BS Standard O-Ring N/A Silicone N/A 0.050 in1.27 mm N/A 70 N/A 0.042 in1.07 mm N/A 0.003 in0.08 mm N/A -002 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186498
N/A BS Standard O-Ring N/A Silicone N/A 0.060 in1.52 mm N/A 70 N/A 0.056 in1.42 mm N/A 0.003 in0.08 mm N/A -003 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186045
N/A BS Standard O-Ring N/A Silicone N/A 0.064 in1.63 mm N/A 70 N/A 0.301 in7.65 mm N/A 0.003 in0.08 mm N/A -903 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186046
N/A BS Standard O-Ring N/A Silicone N/A 0.064 in1.63 mm N/A 70 N/A 0.239 in6.07 mm N/A 0.003 in0.08 mm N/A -902 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
186096
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.313 in7.94 mm N/A 0.003 in0.08 mm N/A -804 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186097
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.25 in6.35 mm N/A 0.003 in0.08 mm N/A -803 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186098
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.187 in4.75 mm N/A 0.003 in0.08 mm N/A -802 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186099
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.125 in3.18 mm N/A 0.003 in0.08 mm N/A -801 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186131
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 6.845 in173.86 mm N/A 0.003 in0.08 mm N/A -562 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186132
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 6.72 in170.69 mm N/A 0.003 in0.08 mm N/A -561 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186133
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 6.695 in170.05 mm N/A 0.003 in0.08 mm N/A -560 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186134
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 6.470 in164.34 mm N/A 0.003 in0.08 mm N/A -559 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186135
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 6.345 in161.16 mm N/A 0.003 in0.08 mm N/A -558 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186136
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 6.22 in157.99 mm N/A 0.003 in0.08 mm N/A -557 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186137
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 6.095 in154.81 mm N/A 0.003 in0.08 mm N/A -556 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186138
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.97 in151.64 mm N/A 0.003 in0.08 mm N/A -555 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186139
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.845 in148.46 mm N/A 0.003 in0.08 mm N/A -554 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186140
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.72 in145.29 mm N/A 0.003 in0.08 mm N/A -553 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186141
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.595 in142.11 mm N/A 0.003 in0.08 mm N/A -552 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186142
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.47 in138.94 mm N/A 0.003 in0.08 mm N/A -551 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186143
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.345 in135.76 mm N/A 0.003 in0.08 mm N/A -550 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186144
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.095 in129.41 mm N/A 0.003 in0.08 mm N/A -548 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
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