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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Inside Diameter (mm)

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O-Ring Industries

N/A
186220
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 11.975 in304.17 mm N/A 0.005 in0.13 mm N/A -381 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186221
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 11.475 in291.47 mm N/A 0.005 in0.13 mm N/A -380 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186222
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 10.975 in278.77 mm N/A 0.005 in0.13 mm N/A -379 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186223
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 10.475 in266.07 mm N/A 0.005 in0.13 mm N/A -378 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186224
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 9.975 in253.37 mm N/A 0.005 in0.13 mm N/A -377 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186225
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 9.725 in247.02 mm N/A 0.005 in0.13 mm N/A -376 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186226
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 9.475 in240.67 mm N/A 0.005 in0.13 mm N/A -375 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186227
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 9.225 in234.32 mm N/A 0.005 in0.13 mm N/A -374 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186228
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 8.975 in227.97 mm N/A 0.005 in0.13 mm N/A -373 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186229
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 8.725 in221.62 mm N/A 0.005 in0.13 mm N/A -372 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186230
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 8.475 in215.27 mm N/A 0.005 in0.13 mm N/A -371 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186231
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 8.225 in208.92 mm N/A 0.005 in0.13 mm N/A -370 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186232
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 7.975 in202.57 mm N/A 0.005 in0.13 mm N/A -369 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186233
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 7.725 in196.22 mm N/A 0.005 in0.13 mm N/A -368 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186234
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 7.475 in189.87 mm N/A 0.005 in0.13 mm N/A -367 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186235
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 7.225 in183.52 mm N/A 0.005 in0.13 mm N/A -366 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186236
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 6.975 in177.17 mm N/A 0.005 in0.13 mm N/A -365 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186237
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 6.725 in170.82 mm N/A 0.005 in0.13 mm N/A -364 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186238
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 6.475 in164.47 mm N/A 0.005 in0.13 mm N/A -363 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186239
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 6.225 in158.12 mm N/A 0.005 in0.13 mm N/A -362 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186240
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.975 in151.77 mm N/A 0.005 in0.13 mm N/A -361 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186241
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.850 in148.59 mm N/A 0.005 in0.13 mm N/A -360 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186242
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.725 in145.42 mm N/A 0.005 in0.13 mm N/A -359 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186243
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.600 in142.24 mm N/A 0.005 in0.13 mm N/A -358 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186244
N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.475 in139.07 mm N/A 0.005 in0.13 mm N/A -357 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
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