BS Silicone O-Rings
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.
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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Cross Section Width (in)
Cross Section Width (mm)
Inside Diameter (in)
Inside Diameter (mm)
Item # |
IntegrationID |
Type |
Material |
Cross Section Width |
Durometer |
Inside Diameter |
CSW Tolerance |
BS Number |
Call for a Quote |
O-Ring Industries |
---|---|---|---|---|---|---|---|---|---|---|
BS242 S-70 |
IntegrationID
N/A 186332 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 3.984 in101.19 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -242 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS243 S-70 |
IntegrationID
N/A 186331 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 4.109 in104.37 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -243 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS244 S-70 |
IntegrationID
N/A 186330 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 4.234 in107.54 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -244 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS245 S-70 |
IntegrationID
N/A 186329 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 4.359 in110.72 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -245 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS246 S-70 |
IntegrationID
N/A 186328 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 4.484 in113.89 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -246 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS247 S-70 |
IntegrationID
N/A 186327 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 4.609 in117.07 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -247 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS248 S-70 |
IntegrationID
N/A 186326 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 4.734 in120.24 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -248 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS249 S-70 |
IntegrationID
N/A 186325 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 4.859 in123.42 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -249 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS250 S-70 |
IntegrationID
N/A 186324 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 4.984 in126.59 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -250 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS251 S-70 |
IntegrationID
N/A 186323 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 5.109 in129.77 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -251 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS252 S-70 |
IntegrationID
N/A 186322 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 5.234 in132.94 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -252 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS253 S-70 |
IntegrationID
N/A 186321 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 5.359 in136.12 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -253 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS254 S-70 |
IntegrationID
N/A 186320 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 5.484 in139.29 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -254 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS255 S-70 |
IntegrationID
N/A 186319 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 5.609 in142.47 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -255 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS256 S-70 |
IntegrationID
N/A 186318 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 5.734 in145.64 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -256 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS257 S-70 |
IntegrationID
N/A 186317 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 5.859 in148.82 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -257 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS258 S-70 |
IntegrationID
N/A 186316 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 5.984 in151.99 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -258 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS259 S-70 |
IntegrationID
N/A 186315 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 6.234 in158.34 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -259 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS260 S-70 |
IntegrationID
N/A 186314 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 6.484 in164.69 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -260 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS261 S-70 |
IntegrationID
N/A 186313 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 6.734 in171.04 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -261 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS262 S-70 |
IntegrationID
N/A 186312 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 6.984 in177.39 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -262 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS263 S-70 |
IntegrationID
N/A 186311 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 7.234 in183.74 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -263 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS264 S-70 |
IntegrationID
N/A 186310 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 7.484 in190.09 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -264 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS265 S-70 |
IntegrationID
N/A 186309 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 7.734 in196.44 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -265 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS266 S-70 |
IntegrationID
N/A 186308 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 7.984 in202.79 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -266 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |