• BS O-Rings
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
186507 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 11.725 in297.82 mm N/A 0.006 in0.15 mm N/A -452A N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186506 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 11.225 in285.12 mm N/A 0.006 in0.15 mm N/A -451A N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186505 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 10.725 in272.42 mm N/A 0.006 in0.15 mm N/A -450A N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186504 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 10.225 in259.72 mm N/A 0.006 in0.15 mm N/A -449A N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186503 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 9.725 in247.02 mm N/A 0.006 in0.15 mm N/A -448A N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186502 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 9.225 in234.32 mm N/A 0.006 in0.15 mm N/A -447A N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186501 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 8.725 in221.62 mm N/A 0.006 in0.15 mm N/A -446A N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186500 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 8.225 in208.92 mm N/A 0.006 in0.15 mm N/A -445A 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
186497 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.070 in1.78 mm N/A 0.003 in0.08 mm N/A -004 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186496 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.101 in2.57 mm N/A 0.003 in0.08 mm N/A -005 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186495 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.114 in2.90 mm N/A 0.003 in0.08 mm N/A -006 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186494 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.145 in3.68 mm N/A 0.003 in0.08 mm N/A -007 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186493 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.176 in4.47 mm N/A 0.003 in0.08 mm N/A -008 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186492 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.208 in5.28 mm N/A 0.003 in0.08 mm N/A -009 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186491 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.239 in6.07 mm N/A 0.003 in0.08 mm N/A -010 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186490 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.301 in7.65 mm N/A 0.003 in0.08 mm N/A -011 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186489 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.364 in9.25 mm N/A 0.003 in0.08 mm N/A -012 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.
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
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
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
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
186483 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.739 in18.77 mm N/A 0.003 in0.08 mm N/A -018 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
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