BS EP 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. EP is also known as: Eythylene Propylene, EPR, EPDM, EPT, E.
EP is an elastomer which is characterized by wide range of applications and good chemical resistance. Ethylene propylene compounds have good resistance to detergents, alkalis, mild acids, greases, silicone oils, and alcohols.For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
EP is an elastomer which is characterized by wide range of applications and good chemical resistance. Ethylene propylene compounds have good resistance to detergents, alkalis, mild acids, greases, silicone oils, and alcohols.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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BS429 EP-70 |
IntegrationID
N/A 183886 |
Type N/A BS Standard O-Ring | Material N/A EP | 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 EP-70 |
IntegrationID
N/A 183887 |
Type N/A BS Standard O-Ring | Material N/A EP | 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 EP-70 |
IntegrationID
N/A 183888 |
Type N/A BS Standard O-Ring | Material N/A EP | 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 EP-70 |
IntegrationID
N/A 183889 |
Type N/A BS Standard O-Ring | Material N/A EP | 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 EP-70 |
IntegrationID
N/A 183890 |
Type N/A BS Standard O-Ring | Material N/A EP | 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. |
BS445A EP-70 |
IntegrationID
N/A 184185 |
Type N/A BS Standard O-Ring | Material N/A EP | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 8.225 in208.92 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -445A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS446A EP-70 |
IntegrationID
N/A 184186 |
Type N/A BS Standard O-Ring | Material N/A EP | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 8.725 in221.62 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -446A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS447A EP-70 |
IntegrationID
N/A 184187 |
Type N/A BS Standard O-Ring | Material N/A EP | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 9.225 in234.32 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -447A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS448A EP-70 |
IntegrationID
N/A 184188 |
Type N/A BS Standard O-Ring | Material N/A EP | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 9.725 in247.02 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -448A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS449A EP-70 |
IntegrationID
N/A 184189 |
Type N/A BS Standard O-Ring | Material N/A EP | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 10.225 in259.72 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -449A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS450A EP-70 |
IntegrationID
N/A 184190 |
Type N/A BS Standard O-Ring | Material N/A EP | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 10.725 in272.42 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -450A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS451A EP-70 |
IntegrationID
N/A 184191 |
Type N/A BS Standard O-Ring | Material N/A EP | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 11.225 in285.12 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -451A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |
BS452A EP-70 |
IntegrationID
N/A 184192 |
Type N/A BS Standard O-Ring | Material N/A EP | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 11.725 in297.82 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -452A | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |