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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
BS254 U-70 N/A
182891 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 5.484 in139.29 mm N/A 0.004 in0.10 mm N/A -254 N/A N/A O-rings are used in the military defense and agriculture industries.
BS254 U-90 N/A
182892 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 5.484 in139.29 mm N/A 0.004 in0.10 mm N/A -254 N/A N/A O-rings are used in the military defense and agriculture industries.v
BS253 U-70 N/A
182893 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 5.359 in136.12 mm N/A 0.004 in0.10 mm N/A -253 N/A N/A O-rings are used in the military defense and agriculture industries.
BS253 U-90 N/A
182894 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 5.359 in136.12 mm N/A 0.004 in0.10 mm N/A -253 N/A N/A O-rings are used in the military defense and agriculture industries.
BS252 U-70 N/A
182895 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 5.234 in132.94 mm N/A 0.004 in0.10 mm N/A -252 N/A N/A O-rings are used in the military defense and agriculture industries.
BS252 U-90 N/A
182896 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 5.234 in132.94 mm N/A 0.004 in0.10 mm N/A -252 N/A N/A O-rings are used in the military defense and agriculture industries.
BS251 U-70 N/A
182897 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 5.109 in129.77 mm N/A 0.004 in0.10 mm N/A -251 N/A N/A O-rings are used in the military defense and agriculture industries.
BS251 U-90 N/A
182898 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 5.109 in129.77 mm N/A 0.004 in0.10 mm N/A -251 N/A N/A O-rings are used in the military defense and agriculture industries.
BS250 U-70 N/A
182899 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 4.984 in126.59 mm N/A 0.004 in0.10 mm N/A -250 N/A N/A O-rings are used in the military defense and agriculture industries.
BS250 U-90 N/A
182900 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 4.984 in126.59 mm N/A 0.004 in0.10 mm N/A -250 N/A N/A O-rings are used in the military defense and agriculture industries.
BS249 U-70 N/A
182901 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 4.859 in123.42 mm N/A 0.004 in0.10 mm N/A -249 N/A N/A O-rings are used in the military defense and agriculture industries.
BS249 U-90 N/A
182902 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 4.859 in123.42 mm N/A 0.004 in0.10 mm N/A -249 N/A N/A O-rings are used in the military defense and agriculture industries.
BS248 U-70 N/A
182903 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 4.734 in120.24 mm N/A 0.004 in0.10 mm N/A -248 N/A N/A O-rings are used in the military defense and agriculture industries.
BS248 U-90 N/A
182904 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 4.734 in120.24 mm N/A 0.004 in0.10 mm N/A -248 N/A N/A O-rings are used in the military defense and agriculture industries.
BS247 U-70 N/A
182905 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 4.609 in117.07 mm N/A 0.004 in0.10 mm N/A -247 N/A N/A O-rings are used in the military defense and agriculture industries.
BS247 U-90 N/A
182906 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 4.609 in117.07 mm N/A 0.004 in0.10 mm N/A -247 N/A N/A O-rings are used in the military defense and agriculture industries.v
BS246 U-70 N/A
182907 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 4.484 in113.89 mm N/A 0.004 in0.10 mm N/A -246 N/A N/A O-rings are used in the military defense and agriculture industries.
BS246 U-90 N/A
182908 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 4.484 in113.89 mm N/A 0.004 in0.10 mm N/A -246 N/A N/A O-rings are used in the military defense and agriculture industries.
BS245 U-70 N/A
182909 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 4.359 in110.72 mm N/A 0.004 in0.10 mm N/A -245 N/A N/A O-rings are used in the military defense and agriculture industries.
BS245 U-90 N/A
182910 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 4.359 in110.72 mm N/A 0.004 in0.10 mm N/A -245 N/A N/A O-rings are used in the military defense and agriculture industries.
BS244 U-70 N/A
182911 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 4.234 in107.54 mm N/A 0.004 in0.10 mm N/A -244 N/A N/A O-rings are used in the military defense and agriculture industries.
BS244 U-90 N/A
182912 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 4.234 in107.54 mm N/A 0.004 in0.10 mm N/A -244 N/A N/A O-rings are used in the military defense and agriculture industries.
BS243 U-70 N/A
182913 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 4.109 in104.37 mm N/A 0.004 in0.10 mm N/A -243 N/A N/A O-rings are used in the military defense and agriculture industries.
BS243 U-90 N/A
182914 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 90 N/A 4.109 in104.37 mm N/A 0.004 in0.10 mm N/A -243 N/A N/A O-rings are used in the military defense and agriculture industries.
BS242 U-70 N/A
182915 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.139 in3.53 mm N/A 70 N/A 3.984 in101.19 mm N/A 0.004 in0.10 mm N/A -242 N/A N/A O-rings are used in the military defense and agriculture industries.
Unit of Measure
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