BS Silicone O-Rings
Silicone 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 |
---|---|---|---|---|---|---|---|---|---|---|
BS430 S-70 |
IntegrationID
N/A 186200 |
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 5.100 in129.54 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -430 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS43 S-70 |
IntegrationID
N/A 186458 |
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 3.489 in88.62 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -043 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS429 S-70 |
IntegrationID
N/A 186201 |
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 4.975 in126.37 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -429 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS428 S-70 |
IntegrationID
N/A 186202 |
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 4.850 in123.19 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -428 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS427 S-70 |
IntegrationID
N/A 186203 |
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 4.725 in120.02 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -427 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS426 S-70 |
IntegrationID
N/A 186204 |
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 4.600 in116.84 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -426 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS425 S-70 |
IntegrationID
N/A 186205 |
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 4.475 in113.67 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -425 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS42 S-70 |
IntegrationID
N/A 186459 |
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 3.239 in82.27 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -042 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS41 S-70 |
IntegrationID
N/A 186460 |
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 2.989 in75.92 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -041 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS40 S-70 |
IntegrationID
N/A 186461 |
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 2.864 in72.75 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -040 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS4 S-70 |
IntegrationID
N/A 186497 |
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 0.070 in1.78 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -004 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS395 S-70 |
IntegrationID
N/A 186206 |
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 25.940 in658.88 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -395 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS394 S-70 |
IntegrationID
N/A 186207 |
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 24.940 in633.48 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -394 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS393 S-70 |
IntegrationID
N/A 186208 |
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 23.940 in608.08 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -393 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS392 S-70 |
IntegrationID
N/A 186209 |
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 22.940 in582.68 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -392 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS391 S-70 |
IntegrationID
N/A 186210 |
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 21.955 in557.66 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -391 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS390 S-70 |
IntegrationID
N/A 186211 |
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 20.955 in532.26 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -390 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS39 S-70 |
IntegrationID
N/A 186462 |
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 2.739 in69.57 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -039 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS389 S-70 |
IntegrationID
N/A 186212 |
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 19.955 in506.86 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -389 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS388 S-70 |
IntegrationID
N/A 186213 |
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 18.955 in481.46 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -388 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS387 S-70 |
IntegrationID
N/A 186214 |
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 17.955 in456.06 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -387 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS386 S-70 |
IntegrationID
N/A 186215 |
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 16.955 in430.66 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -386 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS385 S-70 |
IntegrationID
N/A 186216 |
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 15.955 in405.26 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -385 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS384 S-70 |
IntegrationID
N/A 186217 |
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 14.975 in380.37 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -384 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS383 S-70 |
IntegrationID
N/A 186218 |
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 13.975 in354.97 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -383 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |