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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. Perfluoroelastomer is also known as FKKM and Perfloro.

Parts resist over 1,800 different chemicals, while offering the high temperature stability of PTFE (327°C). They’re used in aggressive chemical processing, pharmaceutical, oil rcovery, gas recovery, and aerospace applications. The proven, long-term performance of Kalrez® parts can mean less repairs, seal changes, inspections and equipment uptime for greater productivity and yield. 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
BS843 KALREZ-90 N/A
188384 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 N/A 2.75 in69.85 mm N/A 0.004 in0.10 mm N/A -843 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS842 KALREZ-90 N/A
188385 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 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 KALREZ-90 N/A
188386 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 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 KALREZ-90 N/A
188387 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 N/A 2.563 in65.10 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 KALREZ-90 N/A
188388 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 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 KALREZ-90 N/A
188389 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 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 KALREZ-90 N/A
188390 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 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 KALREZ-90 N/A
188391 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 N/A 2.313 in58.75 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 KALREZ-90 N/A
188392 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 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 KALREZ-90 N/A
188393 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 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 KALREZ-90 N/A
188394 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 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 KALREZ-90 N/A
188395 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 N/A 2.063 in52.40 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 KALREZ-90 N/A
188396 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 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 KALREZ-90 N/A
188397 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
BS829 KALREZ-90 N/A
188398 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
BS828 KALREZ-90 N/A
188399 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 N/A 1.813 in46.05 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 KALREZ-90 N/A
188400 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
BS826 KALREZ-90 N/A
188401 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
BS825 KALREZ-90 N/A
188402 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
BS824 KALREZ-90 N/A
188403 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
BS814 KALREZ-90 N/A
188404 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
BS813 KALREZ-90 N/A
188405 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
BS812 KALREZ-90 N/A
188406 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
BS810 KALREZ-90 N/A
188407 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
BS809 KALREZ-90 N/A
188408 		N/A BS Standard O-Ring N/A Perfluoroelastomer 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, automotive, aerospace and agriculture industries.
Unit of Measure
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