• 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
186282 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 1.037 in26.34 mm N/A 0.005 in0.13 mm N/A -319 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186121 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.016 in25.81 mm N/A 0.004 in0.10 mm N/A -618 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186479 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.989 in25.12 mm N/A 0.003 in0.08 mm N/A -022 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186432 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.987 in25.07 mm N/A 0.003 in0.08 mm N/A -120 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
186283 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 0.975 in24.77 mm N/A 0.005 in0.13 mm N/A -318 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186089 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.937 in23.80 mm N/A 0.003 in0.08 mm N/A -814 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186480 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.926 in23.52 mm N/A 0.003 in0.08 mm N/A -021 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186433 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.924 in23.47 mm N/A 0.003 in0.08 mm N/A -119 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
186284 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 0.912 in23.16 mm N/A 0.005 in0.13 mm N/A -317 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186090 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.875 in22.23 mm N/A 0.003 in0.08 mm N/A -813 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186481 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.864 in21.95 mm N/A 0.003 in0.08 mm N/A -020 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186434 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.862 in21.89 mm N/A 0.003 in0.08 mm N/A -118 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
186285 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 0.850 in21.59 mm N/A 0.005 in0.13 mm N/A -316 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186091 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.812 in20.62 mm N/A 0.003 in0.08 mm N/A -812 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186482 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 0.801 in20.35 mm N/A 0.003 in0.08 mm N/A -019 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186435 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.799 in20.29 mm N/A 0.003 in0.08 mm N/A -117 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
186286 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 0.787 in19.99 mm N/A 0.005 in0.13 mm N/A -315 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.
N/A
186436 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.737 in18.72 mm N/A 0.003 in0.08 mm N/A -116 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
186287 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 0.725 in18.42 mm N/A 0.005 in0.13 mm N/A -314 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
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