• 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
186325 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 4.859 in123.42 mm N/A 0.004 in0.10 mm N/A -249 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture 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
186063 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 4.875 in123.83 mm N/A 0.005 in0.13 mm N/A -862 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186114 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 4.906 in124.61 mm N/A 0.006 in0.15 mm N/A -625 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186248 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 4.975 in126.37 mm N/A 0.005 in0.13 mm N/A -353 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186201 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 4.975 in126.37 mm N/A 0.006 in0.15 mm N/A -429 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186324 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 4.984 in126.59 mm N/A 0.004 in0.10 mm N/A -250 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186393 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 4.987 in126.67 mm N/A 0.003 in0.08 mm N/A -159 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186452 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 4.989 in126.72 mm N/A 0.003 in0.08 mm N/A -049 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186062 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.000 in127.00 mm N/A 0.005 in0.13 mm N/A -863 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186144 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.095 in129.41 mm N/A 0.003 in0.08 mm N/A -548 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186200 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 5.100 in129.54 mm N/A 0.006 in0.15 mm N/A -430 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186247 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.100 in129.54 mm N/A 0.005 in0.13 mm N/A -354 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186323 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 5.109 in129.77 mm N/A 0.004 in0.10 mm N/A -251 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186061 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.125 in130.18 mm N/A 0.005 in0.13 mm N/A -864 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186246 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.225 in132.72 mm N/A 0.005 in0.13 mm N/A -355 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186199 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 5.225 in132.72 mm N/A 0.006 in0.15 mm N/A -431 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186322 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 5.234 in132.94 mm N/A 0.004 in0.10 mm N/A -252 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186392 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 5.237 in133.02 mm N/A 0.003 in0.08 mm N/A -160 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186451 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.239 in133.07 mm N/A 0.003 in0.08 mm N/A -050 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186060 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.25 in133.35 mm N/A 0.005 in0.13 mm N/A -865 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186113 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 5.297 in134.54 mm N/A 0.006 in0.15 mm N/A -626 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186143 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.345 in135.76 mm N/A 0.003 in0.08 mm N/A -550 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186198 		N/A BS Standard O-Ring N/A Silicone N/A 0.275 in6.99 mm N/A 70 N/A 5.350 in135.89 mm N/A 0.006 in0.15 mm N/A -432 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
N/A
186245 		N/A BS Standard O-Ring N/A Silicone N/A 0.210 in5.33 mm N/A 70 N/A 5.350 in135.89 mm N/A 0.005 in0.13 mm N/A -356 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
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