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

N/A
186145
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 4.86 in123.44 mm N/A 0.003 in0.08 mm N/A -546 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186146
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 4.61 in117.09 mm N/A 0.003 in0.08 mm N/A -544 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186147
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 4.36 in110.74 mm N/A 0.003 in0.08 mm N/A -542 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186148
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 4.110 in104.39 mm N/A 0.003 in0.08 mm N/A -540 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186149
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 3.86 in98.04 mm N/A 0.003 in0.08 mm N/A -538 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186150
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 3.61 in91.69 mm N/A 0.003 in0.08 mm N/A -536 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186151
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 3.36 in85.34 mm N/A 0.003 in0.08 mm N/A -534 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186152
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 3.11 in78.99 mm N/A 0.003 in0.08 mm N/A -532 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186153
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 1.553 in39.45 mm N/A 0.003 in0.08 mm N/A -519 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186154
N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 1.428 in36.27 mm N/A 0.003 in0.08 mm N/A -517 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186155
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 25.9401 in658.88 mm N/A 0.006 in0.15 mm N/A -475 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186156
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 24.940 in633.48 mm N/A 0.006 in0.15 mm N/A -474 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186157
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 23.940 in608.08 mm N/A 0.006 in0.15 mm N/A -473 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186158
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 22.940 in582.68 mm N/A 0.006 in0.15 mm N/A -472 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186159
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 21.955 in557.66 mm N/A 0.006 in0.15 mm N/A -471 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186160
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 20.955 in532.26 mm N/A 0.006 in0.15 mm N/A -470 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186161
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 19.955 in506.86 mm N/A 0.006 in0.15 mm N/A -469 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186162
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 19.455 in494.16 mm N/A 0.006 in0.15 mm N/A -468 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186163
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 18.955 in481.46 mm N/A 0.006 in0.15 mm N/A -467 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186164
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 18.455 in468.76 mm N/A 0.006 in0.15 mm N/A -466 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186165
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 17.955 in456.06 mm N/A 0.006 in0.15 mm N/A -465 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186166
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 17.455 in443.36 mm N/A 0.006 in0.15 mm N/A -464 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186167
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 16.9551 in430.66 mm N/A 0.006 in0.15 mm N/A -463 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186168
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 16.455 in417.96 mm N/A 0.006 in0.15 mm N/A -462 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186169
N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 15.9551 in405.26 mm N/A 0.006 in0.15 mm N/A -461 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
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