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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.

This elastomer possesses mechanical properties similar to Viton®, with the exception of its slightly lower compression set resistance. It is more suitable for sensitive applications where lighter compressive forces are applied to energize the seal. This core has a Shore A hardness of 70 but it also offers a broader operating temperature range of -80°F to +500°F. (-62°C to +260°C). 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
BS842 S-70 N/A
186070 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.687 in68.25 mm N/A 0.004 in0.10 mm N/A -842 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS841 S-70 N/A
186071 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.625 in66.68 mm N/A 0.004 in0.10 mm N/A -841 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS840 S-70 N/A
186072 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.563 in65.1 mm N/A 0.004 in0.10 mm N/A -840 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS839 S-70 N/A
186073 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.500 in63.50 mm N/A 0.004 in0.10 mm N/A -839 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS838 S-70 N/A
186074 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.437 in61.90 mm N/A 0.004 in0.10 mm N/A -838 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS837 S-70 N/A
186075 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.375 in60.33 mm N/A 0.004 in0.10 mm N/A -837 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS836 S-70 N/A
186076 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.313 in58.74 mm N/A 0.004 in0.10 mm N/A -836 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS835 S-70 N/A
186077 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.25 in57.15 mm N/A 0.004 in0.10 mm N/A -835 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS834 S-70 N/A
186078 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.187 in55.55 mm N/A 0.004 in0.10 mm N/A -834 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS833 S-70 N/A
186079 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.125 in53.98 mm N/A 0.004 in0.10 mm N/A -833 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS832 S-70 N/A
186080 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.063 in52.39 mm N/A 0.004 in0.10 mm N/A -832 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS831 S-70 N/A
186081 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 N/A 2.000 in50.80 mm N/A 0.004 in0.10 mm N/A -831 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS830 S-70 N/A
186082 		N/A BS Standard O-Ring N/A Silicone N/A 0.139 in3.53 mm N/A 70 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, automotive, aerospace and agriculture industries.
BS829 S-70 N/A
186083 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS828 S-70 N/A
186084 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS827 S-70 N/A
186085 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS826 S-70 N/A
186086 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS825 S-70 N/A
186087 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS824 S-70 N/A
186088 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS814 S-70 N/A
186089 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS813 S-70 N/A
186090 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS812 S-70 N/A
186091 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS810 S-70 N/A
186092 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS809 S-70 N/A
186093 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
BS807 S-70 N/A
186094 		N/A BS Standard O-Ring N/A Silicone 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, automotive, aerospace and agriculture industries.
Unit of Measure
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