• 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
186102 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 12.225 in310.52 mm N/A 0.006 in0.15 mm N/A -648 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186296 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 11.984 in304.39 mm N/A 0.004 in0.10 mm N/A -278 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture 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
186177 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 11.975 in304.17 mm N/A 0.006 in0.15 mm N/A -453 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
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
186297 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 11.484 in291.69 mm N/A 0.004 in0.10 mm N/A -277 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
186178 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 11.475 in291.47 mm N/A 0.006 in0.15 mm N/A -452 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
186298 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 10.984 in278.99 mm N/A 0.004 in0.10 mm N/A -276 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
186179 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 10.975 in278.77 mm N/A 0.006 in0.15 mm N/A -451 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
186299 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 10.484 in266.29 mm N/A 0.004 in0.10 mm N/A -275 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
186180 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 10.475 in266.07 mm N/A 0.006 in0.15 mm N/A -450 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
186468 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 1.989 in50.52 mm N/A 0.003 in0.08 mm N/A -033 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186416 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 1.987 in50.47 mm N/A 0.003 in0.08 mm N/A -136 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186348 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.984 in50.39 mm N/A 0.004 in0.10 mm N/A -226 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186272 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 1.975 in50.17 mm N/A 0.005 in0.13 mm N/A -329 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186082 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.937 in49.20 mm N/A 0.004 in0.10 mm N/A -830 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186417 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 1.925 in48.90 mm N/A 0.003 in0.08 mm N/A -135 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186083 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.875 in47.63 mm N/A 0.004 in0.10 mm N/A -829 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186469 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 1.864 in47.35 mm N/A 0.003 in0.08 mm N/A -032 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
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