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 |
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BS643 S-70 |
IntegrationID
N/A 186107 |
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 3.299 in83.79 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -643 | 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. |
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. |
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. |
BS647 S-70 |
IntegrationID
N/A 186103 |
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 6.85 in173.99 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -647 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS648 S-70 |
IntegrationID
N/A 186102 |
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 12.225 in310.52 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -648 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS649 S-70 |
IntegrationID
N/A 186101 |
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 12.725 in323.22 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -649 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS650 S-70 |
IntegrationID
N/A 186100 |
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 13.225 in335.92 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -650 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS801 S-70 |
IntegrationID
N/A 186099 |
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 0.125 in3.18 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -801 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS802 S-70 |
IntegrationID
N/A 186098 |
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 0.187 in4.75 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -802 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS803 S-70 |
IntegrationID
N/A 186097 |
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 0.25 in6.35 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -803 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS804 S-70 |
IntegrationID
N/A 186096 |
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 0.313 in7.94 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -804 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS806 S-70 |
IntegrationID
N/A 186095 |
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 0.437 in11.10 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -806 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS807 S-70 |
IntegrationID
N/A 186094 |
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 0.500 in12.70 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -807 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS809 S-70 |
IntegrationID
N/A 186093 |
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 0.625 in15.88 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -809 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS810 S-70 |
IntegrationID
N/A 186092 |
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 0.687 in17.45 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -810 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS812 S-70 |
IntegrationID
N/A 186091 |
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 0.812 in20.62 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -812 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS813 S-70 |
IntegrationID
N/A 186090 |
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 0.875 in22.23 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -813 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS814 S-70 |
IntegrationID
N/A 186089 |
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 0.937 in23.80 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -814 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS824 S-70 |
IntegrationID
N/A 186088 |
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 1.563 in39.70 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -824 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS825 S-70 |
IntegrationID
N/A 186087 |
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 1.625 in41.28 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -825 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS826 S-70 |
IntegrationID
N/A 186086 |
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 1.687 in42.85 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -826 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS827 S-70 |
IntegrationID
N/A 186085 |
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 1.75 in44.45 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -827 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS828 S-70 |
IntegrationID
N/A 186084 |
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 1.813 in46.04 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -828 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS829 S-70 |
IntegrationID
N/A 186083 |
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 1.875 in47.63 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -829 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |