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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
BS279 U-70 N/A
182841 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 12.984 in329.79 mm N/A 0.004 in0.10 mm N/A -279 N/A N/A O-rings are used in the military defense and agriculture industries.
BS279 U-90 N/A
182842 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 12.984 in329.79 mm N/A 0.004 in0.10 mm N/A -279 N/A N/A O-rings are used in the military defense and agriculture industries.
BS278 U-70 N/A
182843 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 11.984 in304.39 mm N/A 0.004 in0.10 mm N/A -278 N/A N/A O-rings are used in the military defense and agriculture industries.
BS278 U-90 N/A
182844 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 11.984 in304.39 mm N/A 0.004 in0.10 mm N/A -278 N/A N/A O-rings are used in the military defense and agriculture industries.
BS277 U-70 N/A
182845 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 11.484 in291.69 mm N/A 0.004 in0.10 mm N/A -277 N/A N/A O-rings are used in the military defense and agriculture industries.
BS277 U-90 N/A
182846 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 11.484 in291.69 mm N/A 0.004 in0.10 mm N/A -277 N/A N/A O-rings are used in the military defense and agriculture industries.
BS276 U-70 N/A
182847 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 10.984 in278.99 mm N/A 0.004 in0.10 mm N/A -276 N/A N/A O-rings are used in the military defense and agriculture industries.
BS276 U-90 N/A
182848 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 10.984 in278.99 mm N/A 0.004 in0.10 mm N/A -276 N/A N/A O-rings are used in the military defense and agriculture industries.
BS275 U-70 N/A
182849 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 10.484 in266.29 mm N/A 0.004 in0.10 mm N/A -275 N/A N/A O-rings are used in the military defense and agriculture industries.
BS275 U-90 N/A
182850 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 10.484 in266.29 mm N/A 0.004 in0.10 mm N/A -275 N/A N/A O-rings are used in the military defense and agriculture industries.
BS274 U-70 N/A
182851 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 9.984 in253.59 mm N/A 0.004 in0.10 mm N/A -274 N/A N/A O-rings are used in the military defense and agriculture industries.v
BS274 U-90 N/A
182852 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 9.984 in253.59 mm N/A 0.004 in0.10 mm N/A -274 N/A N/A O-rings are used in the military defense and agriculture industries.
BS273 U-70 N/A
182853 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 9.734 in247.24 mm N/A 0.004 in0.10 mm N/A -273 N/A N/A O-rings are used in the military defense and agriculture industries.
BS273 U-90 N/A
182854 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 9.734 in247.24 mm N/A 0.004 in0.10 mm N/A -273 N/A N/A O-rings are used in the military defense and agriculture industries.
BS272 U-70 N/A
182855 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 9.484 in240.89 mm N/A 0.004 in0.10 mm N/A -272 N/A N/A O-rings are used in the military defense and agriculture industries.
BS272 U-90 N/A
182856 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 9.484 in240.89 mm N/A 0.004 in0.10 mm N/A -272 N/A N/A O-rings are used in the military defense and agriculture industries.
BS271 U-70 N/A
182857 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 9.234 in234.54 mm N/A 0.004 in0.10 mm N/A -271 N/A N/A O-rings are used in the military defense and agriculture industries.
BS271 U-90 N/A
182858 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 9.234 in234.54 mm N/A 0.004 in0.10 mm N/A -271 N/A N/A O-rings are used in the military defense and agriculture industries.
BS270 U-70 N/A
182859 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 8.984 in228.19 mm N/A 0.004 in0.10 mm N/A -270 N/A N/A O-rings are used in the military defense and agriculture industries.
BS270 U-90 N/A
182860 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 8.984 in228.19 mm N/A 0.004 in0.10 mm N/A -270 N/A N/A O-rings are used in the military defense and agriculture industries.
BS269 U-70 N/A
182861 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 8.734 in221.84 mm N/A 0.004 in0.10 mm N/A -269 N/A N/A O-rings are used in the military defense and agriculture industries.
BS269 U-90 N/A
182862 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 8.734 in221.84 mm N/A 0.004 in0.10 mm N/A -269 N/A N/A O-rings are used in the military defense and agriculture industries.
BS268 U-70 N/A
182863 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 8.484 in215.49 mm N/A 0.004 in0.10 mm N/A -268 N/A N/A O-rings are used in the military defense and agriculture industries.
BS268 U-90 N/A
182864 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 8.484 in215.49 mm N/A 0.004 in0.10 mm N/A -268 N/A N/A O-rings are used in the military defense and agriculture industries.
BS267 U-70 N/A
182865 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 8.234 in209.14 mm N/A 0.004 in0.10 mm N/A -267 N/A N/A O-rings are used in the military defense and agriculture industries.v
Unit of Measure
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