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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. Buna is also known as: Nitrile, NBR, N, Buna-N.

Nitrile, chemically, is a copolymer of butadiene and acrylonitrile. Acrylonitrile content is varied in commercial products from 18% to 48%. As the nitrile content increases, resistance to petroleum base oils and hydrocarbon fuels increases, but low temperature flexibility decreases.

Due to its excellent resistance to petroleum products, and its ability to be compounded for service over a temperature range of -65 to +275°F(-54 to +135°C), nitrile is the most widely used elastomer in the seal industry today.

Inherently nitrile does not possess good resistance to ozone, sunlight or weather, but this can be substantially improved through compounding.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
BS120 B-90 N/A
184968 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.987 in25.07 mm N/A 0.003 in0.08 mm N/A -120 N/A N/A O-rings are used in the military defense and agriculture industries.
BS119 B-70 N/A
184969 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.924 in23.47 mm N/A 0.003 in0.08 mm N/A -119 N/A N/A O-rings are used in the military defense and agriculture industries.
BS119 B-90 N/A
184970 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.924 in23.47 mm N/A 0.003 in0.08 mm N/A -119 N/A N/A O-rings are used in the military defense and agriculture industries.v
BS118 B-70 N/A
184971 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.862 in21.89 mm N/A 0.003 in0.08 mm N/A -118 N/A N/A O-rings are used in the military defense and agriculture industries.
BS118 B-90 N/A
184972 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.862 in21.89 mm N/A 0.003 in0.08 mm N/A -118 N/A N/A O-rings are used in the military defense and agriculture industries.
BS117 B-70 N/A
184973 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.799 in20.29 mm N/A 0.003 in0.08 mm N/A -117 N/A N/A O-rings are used in the military defense and agriculture industries.
BS117 B-90 N/A
184974 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.799 in20.29 mm N/A 0.003 in0.08 mm N/A -117 N/A N/A O-rings are used in the military defense and agriculture industries.
BS116 B-70 N/A
184975 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.737 in18.72 mm N/A 0.003 in0.08 mm N/A -116 N/A N/A O-rings are used in the military defense and agriculture industries.
BS116 B-90 N/A
184976 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.737 in18.72 mm N/A 0.003 in0.08 mm N/A -116 N/A N/A O-rings are used in the military defense and agriculture industries.
BS115 B-70 N/A
184977 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.674 in17.12 mm N/A 0.003 in0.08 mm N/A -115 N/A N/A O-rings are used in the military defense and agriculture industries.
BS115 B-90 N/A
184978 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.674 in17.12 mm N/A 0.003 in0.08 mm N/A -115 N/A N/A O-rings are used in the military defense and agriculture industries.
BS114 B-70 N/A
184979 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.612 in15.54 mm N/A 0.003 in0.08 mm N/A -114 N/A N/A O-rings are used in the military defense and agriculture industries.
BS114 B-90 N/A
184980 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.612 in15.54 mm N/A 0.003 in0.08 mm N/A -114 N/A N/A O-rings are used in the military defense and agriculture industries.
BS113 B-70 N/A
184981 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.549 in13.94 mm N/A 0.003 in0.08 mm N/A -113 N/A N/A O-rings are used in the military defense and agriculture industries.
BS113 B-90 N/A
184982 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.549 in13.94 mm N/A 0.003 in0.08 mm N/A -113 N/A N/A O-rings are used in the military defense and agriculture industries.
BS112 B-70 N/A
184983 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.487 in12.37 mm N/A 0.003 in0.08 mm N/A -112 N/A N/A O-rings are used in the military defense and agriculture industries.
BS112 B-90 N/A
184984 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.487 in12.37 mm N/A 0.003 in0.08 mm N/A -112 N/A N/A O-rings are used in the military defense and agriculture industries.v
BS111 B-70 N/A
184985 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.424 in10.77 mm N/A 0.003 in0.08 mm N/A -111 N/A N/A O-rings are used in the military defense and agriculture industries.
BS111 B-90 N/A
184986 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.424 in10.77 mm N/A 0.003 in0.08 mm N/A -111 N/A N/A O-rings are used in the military defense and agriculture industries.
BS110 B-70 N/A
184987 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.362 in9.19 mm N/A 0.003 in0.08 mm N/A -110 N/A N/A O-rings are used in the military defense and agriculture industries.
BS110 B-90 N/A
184988 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.362 in9.19 mm N/A 0.003 in0.08 mm N/A -110 N/A N/A O-rings are used in the military defense and agriculture industries.
BS109 B-70 N/A
184989 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.299 in7.59 mm N/A 0.003 in0.08 mm N/A -109 N/A N/A O-rings are used in the military defense and agriculture industries.
BS109 B-90 N/A
184990 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.299 in7.59 mm N/A 0.003 in0.08 mm N/A -109 N/A N/A O-rings are used in the military defense and agriculture industries.
BS108 B-70 N/A
184991 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.237 in6.02 mm N/A 0.003 in0.08 mm N/A -108 N/A N/A O-rings are used in the military defense and agriculture industries.
BS108 B-90 N/A
184992 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.237 in6.02 mm N/A 0.003 in0.08 mm N/A -108 N/A N/A O-rings are used in the military defense and agriculture industries.
Unit of Measure
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