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
186382
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 7.737 in196.52 mm N/A 0.003 in0.08 mm N/A -170 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186381
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 7.987 in202.87 mm N/A 0.003 in0.08 mm N/A -171 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186380
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 8.237 in209.22 mm N/A 0.003 in0.08 mm N/A -172 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186379
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 8.487 in215.57 mm N/A 0.003 in0.08 mm N/A -173 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186378
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 8.737 in221.92 mm N/A 0.003 in0.08 mm N/A -174 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186377
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 8.987 in228.27 mm N/A 0.003 in0.08 mm N/A -175 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186376
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 9.237 in234.62 mm N/A 0.003 in0.08 mm N/A -176 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186375
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 9.487 in240.97 mm N/A 0.003 in0.08 mm N/A -177 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186374
N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 9.737 in247.32 mm N/A 0.003 in0.08 mm N/A -178 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186373
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.171 in4.34 mm N/A 0.004 in0.10 mm N/A -201 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186372
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.234 in5.94 mm N/A 0.004 in0.10 mm N/A -202 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186371
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.296 in7.52 mm N/A 0.004 in0.10 mm N/A -203 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186370
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.359 in9.12 mm N/A 0.004 in0.10 mm N/A -204 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186369
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.421 in10.69 mm N/A 0.004 in0.10 mm N/A -205 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
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
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
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
186364
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.734 in18.64 mm N/A 0.004 in0.10 mm N/A -210 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186363
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.796 in20.22 mm N/A 0.004 in0.10 mm N/A -211 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186362
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.859 in21.82 mm N/A 0.004 in0.10 mm N/A -212 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186361
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.921 in23.39 mm N/A 0.004 in0.10 mm N/A -213 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186360
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.984 in24.99 mm N/A 0.004 in0.10 mm N/A -214 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186359
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.046 in26.57 mm N/A 0.004 in0.10 mm N/A -215 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186358
N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.109 in28.17 mm N/A 0.004 in0.10 mm N/A -216 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
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