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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.
BS O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

BS Number

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O-Ring Industries

Quantity
BS107 S-70 N/A
186445 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.206 in5.23 mm N/A 0.003 in0.08 mm N/A -107 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS106 S-70 N/A
186446 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.175 in4.45 mm N/A 0.003 in0.08 mm N/A -106 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS105 S-70 N/A
186447 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.143 in3.63 mm N/A 0.003 in0.08 mm N/A -105 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS104 S-70 N/A
186448 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.112 in2.84 mm N/A 0.003 in0.08 mm N/A -104 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS103 S-70 N/A
186449 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.081 in2.06 mm N/A 0.003 in0.08 mm N/A -103 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS102 S-70 N/A
186450 		N/A BS Standard O-Ring N/A Silicone N/A 0.103 in2.62 mm N/A 70 N/A 0.049 in1.24 mm N/A 0.003 in0.08 mm N/A -102 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS50 S-70 N/A
186451 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 5.239 in133.07 mm N/A 0.003 in0.08 mm N/A -050 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS49 S-70 N/A
186452 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 4.989 in126.72 mm N/A 0.003 in0.08 mm N/A -049 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS48 S-70 N/A
186453 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 4.739 in120.37 mm N/A 0.003 in0.08 mm N/A -048 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS47 S-70 N/A
186454 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 4.489 in114.02 mm N/A 0.003 in0.08 mm N/A -047 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS46 S-70 N/A
186455 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 4.239 in107.67 mm N/A 0.003 in0.08 mm N/A -046 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS45 S-70 N/A
186456 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 3.989 in101.32 mm N/A 0.003 in0.08 mm N/A -045 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS44 S-70 N/A
186457 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 3.739 in94.97 mm N/A 0.003 in0.08 mm N/A -044 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS43 S-70 N/A
186458 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 3.489 in88.62 mm N/A 0.003 in0.08 mm N/A -043 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS42 S-70 N/A
186459 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 3.239 in82.27 mm N/A 0.003 in0.08 mm N/A -042 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS41 S-70 N/A
186460 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 2.989 in75.92 mm N/A 0.003 in0.08 mm N/A -041 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS40 S-70 N/A
186461 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 2.864 in72.75 mm N/A 0.003 in0.08 mm N/A -040 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS39 S-70 N/A
186462 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 2.739 in69.57 mm N/A 0.003 in0.08 mm N/A -039 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS38 S-70 N/A
186463 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 2.614 in66.40 mm N/A 0.003 in0.08 mm N/A -038 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS37 S-70 N/A
186464 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 2.489 in63.22 mm N/A 0.003 in0.08 mm N/A -037 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS36 S-70 N/A
186465 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 2.364 in60.05 mm N/A 0.003 in0.08 mm N/A -036 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS35 S-70 N/A
186466 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 2.239 in56.87 mm N/A 0.003 in0.08 mm N/A -035 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS34 S-70 N/A
186467 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 2.114 in53.70 mm N/A 0.003 in0.08 mm N/A -034 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS33 S-70 N/A
186468 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 1.989 in50.52 mm N/A 0.003 in0.08 mm N/A -033 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS32 S-70 N/A
186469 		N/A BS Standard O-Ring N/A Silicone N/A 0.070 in1.78 mm N/A 70 N/A 1.864 in47.35 mm N/A 0.003 in0.08 mm N/A -032 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
Unit of Measure
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