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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.
BS O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

BS Number

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O-Ring Industries

Quantity
BS229 S-70 N/A
186345 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.359 in59.92 mm N/A 0.004 in0.10 mm N/A -229 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS228 S-70 N/A
186346 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.234 in56.74 mm N/A 0.004 in0.10 mm N/A -228 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS227 S-70 N/A
186347 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.109 in53.57 mm N/A 0.004 in0.10 mm N/A -227 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS226 S-70 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.
BS225 S-70 N/A
186349 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.859 in47.22 mm N/A 0.004 in0.10 mm N/A -225 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS224 S-70 N/A
186350 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.734 in44.04 mm N/A 0.004 in0.10 mm N/A -224 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS223 S-70 N/A
186351 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.609 in40.87 mm N/A 0.004 in0.10 mm N/A -223 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS222 S-70 N/A
186352 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.484 in37.69 mm N/A 0.004 in0.10 mm N/A -222 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS221 S-70 N/A
186353 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.421 in36.09 mm N/A 0.004 in0.10 mm N/A -221 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS220 S-70 N/A
186354 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.359 in34.52 mm N/A 0.004 in0.10 mm N/A -220 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS219 S-70 N/A
186355 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.296 in32.92 mm N/A 0.004 in0.10 mm N/A -219 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS218 S-70 N/A
186356 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.234 in31.34 mm N/A 0.004 in0.10 mm N/A -218 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS217 S-70 N/A
186357 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.171 in29.74 mm N/A 0.004 in0.10 mm N/A -217 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS216 S-70 N/A
186358 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.109 in28.17 mm N/A 0.004 in0.10 mm N/A -216 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS215 S-70 N/A
186359 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 1.046 in26.57 mm N/A 0.004 in0.10 mm N/A -215 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS214 S-70 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.
BS213 S-70 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.
BS212 S-70 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.
BS211 S-70 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.
BS210 S-70 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.
BS209 S-70 N/A
186365 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.672 in17.07 mm N/A 0.004 in0.10 mm N/A -209 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS208 S-70 N/A
186366 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.609 in15.47 mm N/A 0.004 in0.10 mm N/A -208 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS207 S-70 N/A
186367 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.549 in13.94 mm N/A 0.004 in0.10 mm N/A -207 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS206 S-70 N/A
186368 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.484 in12.29 mm N/A 0.004 in0.10 mm N/A -206 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS205 S-70 N/A
186369 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 0.421 in10.69 mm N/A 0.004 in0.10 mm N/A -205 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
Unit of Measure
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