• BS O-Rings
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.
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O-Ring Industries

N/A
184268 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 1.937 in49.20 mm N/A 0.004 in0.10 mm N/A -830 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184269 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 1.875 in47.63 mm N/A 0.004 in0.10 mm N/A -829 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184270 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 1.875 in47.63 mm N/A 0.004 in0.10 mm N/A -829 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184271 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 1.813 in46.04 mm N/A 0.004 in0.10 mm N/A -828 N/A N/A O-rings are used in the military defense and agriculture industries.v
N/A
184272 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 1.813 in46.04 mm N/A 0.004 in0.10 mm N/A -828 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184273 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 1.75 in44.45 mm N/A 0.004 in0.10 mm N/A -827 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184274 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 1.75 in44.45 mm N/A 0.004 in0.10 mm N/A -827 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184275 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 1.687 in42.85 mm N/A 0.004 in0.10 mm N/A -826 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184276 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 1.687 in42.85 mm N/A 0.004 in0.10 mm N/A -826 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184277 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 1.625 in41.28 mm N/A 0.004 in0.10 mm N/A -825 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184278 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 1.625 in41.28 mm N/A 0.004 in0.10 mm N/A -825 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184279 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 1.563 in39.70 mm N/A 0.004 in0.10 mm N/A -824 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184280 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 1.563 in39.70 mm N/A 0.004 in0.10 mm N/A -824 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184281 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.937 in23.80 mm N/A 0.003 in0.08 mm N/A -814 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184282 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.937 in23.80 mm N/A 0.003 in0.08 mm N/A -814 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184283 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.875 in22.23 mm N/A 0.003 in0.08 mm N/A -813 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184284 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.875 in22.23 mm N/A 0.003 in0.08 mm N/A -813 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184285 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.812 in20.62 mm N/A 0.003 in0.08 mm N/A -812 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184286 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.812 in20.62 mm N/A 0.003 in0.08 mm N/A -812 N/A N/A O-rings are used in the military defense and agriculture industries.v
N/A
184287 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.687 in17.45 mm N/A 0.003 in0.08 mm N/A -810 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184288 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.687 in17.45 mm N/A 0.003 in0.08 mm N/A -810 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184289 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.625 in15.88 mm N/A 0.003 in0.08 mm N/A -809 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184290 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.625 in15.88 mm N/A 0.003 in0.08 mm N/A -809 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184291 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 0.500 in12.70 mm N/A 0.003 in0.08 mm N/A -807 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
184292 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 0.500 in12.70 mm N/A 0.003 in0.08 mm N/A -807 N/A N/A O-rings are used in the military defense and agriculture industries.
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