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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

Call for a Quote

O-Ring Industries

Quantity
BS6 U-70 N/A
183241 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 N/A 0.114 in2.90 mm N/A 0.003 in0.08 mm N/A -006 N/A N/A O-rings are used in the military defense and agriculture industries.
BS6 U-90 N/A
183242 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 90 N/A 0.114 in2.90 mm N/A 0.003 in0.08 mm N/A -006 N/A N/A O-rings are used in the military defense and agriculture industries.
BS5 U-70 N/A
183243 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 N/A 0.101 in2.57 mm N/A 0.003 in0.08 mm N/A -005 N/A N/A O-rings are used in the military defense and agriculture industries.
BS5 U-90 N/A
183244 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 90 N/A 0.101 in2.57 mm N/A 0.003 in0.08 mm N/A -005 N/A N/A O-rings are used in the military defense and agriculture industries.
BS4 U-70 N/A
183245 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 70 N/A 0.070 in1.78 mm N/A 0.003 in0.08 mm N/A -004 N/A N/A O-rings are used in the military defense and agriculture industries.
BS4 U-90 N/A
183246 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.070 in1.78 mm N/A 90 N/A 0.070 in1.78 mm N/A 0.003 in0.08 mm N/A -004 N/A N/A O-rings are used in the military defense and agriculture industries.
BS3 U-70 N/A
183247 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.060 in1.52 mm N/A 70 N/A 0.056 in1.42 mm N/A 0.003 in0.08 mm N/A -003 N/A N/A O-rings are used in the military defense and agriculture industries.
BS3 U-90 N/A
183248 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.060 in1.52 mm N/A 90 N/A 0.056 in1.42 mm N/A 0.003 in0.08 mm N/A -003 N/A N/A O-rings are used in the military defense and agriculture industries.
BS2 U-70 N/A
183249 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.050 in1.27 mm N/A 70 N/A 0.042 in1.07 mm N/A 0.003 in0.08 mm N/A -002 N/A N/A O-rings are used in the military defense and agriculture industries.v
BS2 U-90 N/A
183250 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.050 in1.27 mm N/A 90 N/A 0.042 in1.07 mm N/A 0.003 in0.08 mm N/A -002 N/A N/A O-rings are used in the military defense and agriculture industries.
BS445A U-70 N/A
183251 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 N/A 8.225 in208.92 mm N/A 0.006 in0.15 mm N/A -445A N/A N/A O-rings are used in the military defense and agriculture industries.
BS445A U-90 N/A
183252 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 90 N/A 8.225 in208.92 mm N/A 0.006 in0.15 mm N/A -445A N/A N/A O-rings are used in the military defense and agriculture industries.
BS446A U-70 N/A
183253 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 N/A 8.725 in221.62 mm N/A 0.006 in0.15 mm N/A -446A N/A N/A O-rings are used in the military defense and agriculture industries.
BS446A U-90 N/A
183254 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 90 N/A 8.725 in221.62 mm N/A 0.006 in0.15 mm N/A -446A N/A N/A O-rings are used in the military defense and agriculture industries.
BS447A U-70 N/A
183255 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 N/A 9.225 in234.32 mm N/A 0.006 in0.15 mm N/A -447A N/A N/A O-rings are used in the military defense and agriculture industries.
BS447A U-90 N/A
183256 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 90 N/A 9.225 in234.32 mm N/A 0.006 in0.15 mm N/A -447A N/A N/A O-rings are used in the military defense and agriculture industries.
BS448A U-70 N/A
183257 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 N/A 9.725 in247.02 mm N/A 0.006 in0.15 mm N/A -448A N/A N/A O-rings are used in the military defense and agriculture industries.
BS448A U-90 N/A
183258 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 90 N/A 9.725 in247.02 mm N/A 0.006 in0.15 mm N/A -448A N/A N/A O-rings are used in the military defense and agriculture industries.
BS449A U-70 N/A
183259 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 N/A 10.225 in259.72 mm N/A 0.006 in0.15 mm N/A -449A N/A N/A O-rings are used in the military defense and agriculture industries.
BS449A U-90 N/A
183260 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 90 N/A 10.225 in259.72 mm N/A 0.006 in0.15 mm N/A -449A N/A N/A O-rings are used in the military defense and agriculture industries.
BS450A U-70 N/A
183261 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 N/A 10.725 in272.42 mm N/A 0.006 in0.15 mm N/A -450A N/A N/A O-rings are used in the military defense and agriculture industries.v
BS450A U-90 N/A
183262 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 90 N/A 10.725 in272.42 mm N/A 0.006 in0.15 mm N/A -450A N/A N/A O-rings are used in the military defense and agriculture industries.
BS451A U-70 N/A
183263 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 N/A 11.225 in285.12 mm N/A 0.006 in0.15 mm N/A -451A N/A N/A O-rings are used in the military defense and agriculture industries.
BS451A U-90 N/A
183264 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 90 N/A 11.225 in285.12 mm N/A 0.006 in0.15 mm N/A -451A N/A N/A O-rings are used in the military defense and agriculture industries.
BS452A U-70 N/A
183265 		N/A BS Standard O-Ring N/A Polyurethane N/A 0.275 in6.99 mm N/A 70 N/A 11.725 in297.82 mm N/A 0.006 in0.15 mm N/A -452A N/A N/A O-rings are used in the military defense and agriculture industries.
Unit of Measure
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