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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. Viton is also known as: Fluorocarbon and FKM. Viton® is a registered trademarks of DuPont® Dow Elastomers.

A fluoroelastomer compound with a combination of exceptional mechanical properties and compression set resistance. This particular energizer gives an O-ring excellent memory and the ability to recover rapidly from deformation. This core has a Shore A hardness of 75 with a suggested operating temperature range of -10°F to +300°F (-23°C to +150°C) in encapsulated applications. 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
BS561 V-90 N/A
185669 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 6.72 in170.69 mm N/A 0.003 in0.08 mm N/A -561 N/A N/A O-rings are used in the military defense and agriculture industries.
BS560 V-90 N/A
185670 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 6.695 in170.05 mm N/A 0.003 in0.08 mm N/A -560 N/A N/A O-rings are used in the military defense and agriculture industries.
BS559 V-90 N/A
185671 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 6.470 in164.34 mm N/A 0.003 in0.08 mm N/A -559 N/A N/A O-rings are used in the military defense and agriculture industries.
BS558 V-90 N/A
185672 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 6.345 in161.16 mm N/A 0.003 in0.08 mm N/A -558 N/A N/A O-rings are used in the military defense and agriculture industries.
BS557 V-90 N/A
185673 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 6.22 in157.99 mm N/A 0.003 in0.08 mm N/A -557 N/A N/A O-rings are used in the military defense and agriculture industries.
BS556 V-90 N/A
185674 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 6.095 in154.81 mm N/A 0.003 in0.08 mm N/A -556 N/A N/A O-rings are used in the military defense and agriculture industries.
BS555 V-90 N/A
185675 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 5.97 in151.64 mm N/A 0.003 in0.08 mm N/A -555 N/A N/A O-rings are used in the military defense and agriculture industries.v
BS554 V-90 N/A
185676 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 5.845 in148.46 mm N/A 0.003 in0.08 mm N/A -554 N/A N/A O-rings are used in the military defense and agriculture industries.
BS553 V-90 N/A
185677 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 5.72 in145.29 mm N/A 0.003 in0.08 mm N/A -553 N/A N/A O-rings are used in the military defense and agriculture industries.
BS552 V-90 N/A
185678 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 5.595 in142.11 mm N/A 0.003 in0.08 mm N/A -552 N/A N/A O-rings are used in the military defense and agriculture industries.
BS551 V-90 N/A
185679 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 5.47 in138.94 mm N/A 0.003 in0.08 mm N/A -551 N/A N/A O-rings are used in the military defense and agriculture industries.
BS550 V-90 N/A
185680 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 5.345 in135.76 mm N/A 0.003 in0.08 mm N/A -550 N/A N/A O-rings are used in the military defense and agriculture industries.
BS548 V-90 N/A
185681 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 5.095 in129.41 mm N/A 0.003 in0.08 mm N/A -548 N/A N/A O-rings are used in the military defense and agriculture industries.
BS546 V-90 N/A
185682 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 4.86 in123.44 mm N/A 0.003 in0.08 mm N/A -546 N/A N/A O-rings are used in the military defense and agriculture industries.
BS544 V-90 N/A
185683 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 4.61 in117.09 mm N/A 0.003 in0.08 mm N/A -544 N/A N/A O-rings are used in the military defense and agriculture industries.
BS542 V-90 N/A
185684 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 4.36 in110.74 mm N/A 0.003 in0.08 mm N/A -542 N/A N/A O-rings are used in the military defense and agriculture industries.
BS540 V-90 N/A
185685 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 4.110 in104.39 mm N/A 0.003 in0.08 mm N/A -540 N/A N/A O-rings are used in the military defense and agriculture industries.
BS538 V-90 N/A
185686 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 3.86 in98.04 mm N/A 0.003 in0.08 mm N/A -538 N/A N/A O-rings are used in the military defense and agriculture industries.
BS536 V-90 N/A
185687 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 3.61 in91.69 mm N/A 0.003 in0.08 mm N/A -536 N/A N/A O-rings are used in the military defense and agriculture industries.v
BS534 V-90 N/A
185688 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 3.36 in85.34 mm N/A 0.003 in0.08 mm N/A -534 N/A N/A O-rings are used in the military defense and agriculture industries.
BS532 V-90 N/A
185689 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 3.11 in78.99 mm N/A 0.003 in0.08 mm N/A -532 N/A N/A O-rings are used in the military defense and agriculture industries.
BS519 V-90 N/A
185690 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 1.553 in39.45 mm N/A 0.003 in0.08 mm N/A -519 N/A N/A O-rings are used in the military defense and agriculture industries.
BS517 V-90 N/A
185691 		N/A BS Standard O-Ring N/A Viton N/A 0.070 in1.78 mm N/A 90 N/A 1.428 in36.27 mm N/A 0.003 in0.08 mm N/A -517 N/A N/A O-rings are used in the military defense and agriculture industries.
BS475 V-90 N/A
185692 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 25.9401 in658.88 mm N/A 0.006 in0.15 mm N/A -475 N/A N/A O-rings are used in the military defense and agriculture industries.
BS474 V-90 N/A
185693 		N/A BS Standard O-Ring N/A Viton N/A 0.275 in6.99 mm N/A 90 N/A 24.940 in633.48 mm N/A 0.006 in0.15 mm N/A -474 N/A N/A O-rings are used in the military defense and agriculture industries.
Unit of Measure
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