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 |
---|---|---|---|---|---|---|---|---|---|---|
BS437 S-70 |
IntegrationID
N/A 186193 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 5.975 in151.77 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -437 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS361 S-70 |
IntegrationID
N/A 186240 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 5.975 in151.77 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -361 | 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. |
BS163 S-70 |
IntegrationID
N/A 186389 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.103 in2.62 mm | Durometer N/A 70 | Inside Diameter N/A 5.987 in152.07 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -163 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS556 S-70 |
IntegrationID
N/A 186137 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 6.095 in154.81 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -556 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS644 S-70 |
IntegrationID
N/A 186106 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 6.100 in154.94 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -644 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS872 S-70 |
IntegrationID
N/A 186054 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.125 in155.58 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -872 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS557 S-70 |
IntegrationID
N/A 186136 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 6.22 in157.99 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -557 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS438 S-70 |
IntegrationID
N/A 186192 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.225 in158.12 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -438 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS362 S-70 |
IntegrationID
N/A 186239 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 6.225 in158.12 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -362 | 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. |
BS164 S-70 |
IntegrationID
N/A 186388 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.103 in2.62 mm | Durometer N/A 70 | Inside Diameter N/A 6.237 in158.42 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -164 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS627 S-70 |
IntegrationID
N/A 186112 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.281 in159.54 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -627 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS558 S-70 |
IntegrationID
N/A 186135 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 6.345 in161.16 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -558 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS645 S-70 |
IntegrationID
N/A 186105 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 6.35 in161.29 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -645 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS874 S-70 |
IntegrationID
N/A 186053 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.375 in161.93 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -874 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS559 S-70 |
IntegrationID
N/A 186134 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 6.470 in164.34 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -559 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS439 S-70 |
IntegrationID
N/A 186191 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.475 in164.47 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -439 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS363 S-70 |
IntegrationID
N/A 186238 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 6.475 in164.47 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -363 | 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. |
BS165 S-70 |
IntegrationID
N/A 186387 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.103 in2.62 mm | Durometer N/A 70 | Inside Diameter N/A 6.487 in164.77 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -165 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS628 S-70 |
IntegrationID
N/A 186111 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.563 in166.70 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -628 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS646 S-70 |
IntegrationID
N/A 186104 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 6.600 in167.64 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -646 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS876 S-70 |
IntegrationID
N/A 186052 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.625 in168.28 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -876 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS560 S-70 |
IntegrationID
N/A 186133 |
Type N/A BS Standard O-Ring | Material N/A Silicone | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 6.695 in170.05 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -560 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |