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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. Polyurethane is also known as urethane, cast urethan and millable urethane.

Polyurethane is also known as urethane, cast urethan and millable urethane. Exceptional tensile strength. Abrasion and low temperature resistance. Typical applications include hydraulic seals, gaskets, diaphragms, hoses, and wheels for skate boards. 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
BS546 U-70 N/A
182541 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 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.
BS546 U-90 N/A
182542 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182543 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 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.
BS544 U-90 N/A
182544 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182545 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 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.
BS542 U-90 N/A
182546 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182547 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 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.
BS540 U-90 N/A
182548 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182549 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 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.
BS538 U-90 N/A
182550 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182551 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 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.
BS536 U-90 N/A
182552 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182553 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 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.
BS534 U-90 N/A
182554 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182555 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 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.
BS532 U-90 N/A
182556 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182557 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 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.
BS519 U-90 N/A
182558 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182559 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 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.
BS517 U-90 N/A
182560 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182561 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 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.
BS475 U-90 N/A
182562 		N/A BS Standard O-Ring N/A Polyurethane 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 U-70 N/A
182563 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 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.
BS474 U-90 N/A
182564 		N/A BS Standard O-Ring N/A Polyurethane 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.v
BS473 U-70 N/A
182565 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 N/A 23.940 in608.08 mm N/A 0.006 in0.15 mm N/A -473 N/A N/A O-rings are used in the military defense and agriculture industries.
Unit of Measure
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