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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
BS620 KALREZ-90 N/A
188434 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.210 in5.33 mm N/A 90 N/A 3.141 in79.78 mm N/A 0.005 in0.13 mm N/A -620 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS619 KALREZ-90 N/A
188435 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.210 in5.33 mm N/A 90 N/A 2.938 in74.63 mm N/A 0.005 in0.13 mm N/A -619 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS618 KALREZ-90 N/A
188436 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.139 in3.53 mm N/A 90 N/A 1.016 in25.81 mm N/A 0.004 in0.10 mm N/A -618 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS617 KALREZ-90 N/A
188437 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.103 in2.62 mm N/A 90 N/A 0.703 in17.86 mm N/A 0.003 in0.08 mm N/A -617 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS616 KALREZ-90 N/A
188438 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.103 in2.62 mm N/A 90 N/A 0.594 in15.09 mm N/A 0.003 in0.08 mm N/A -616 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS615 KALREZ-90 N/A
188439 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.103 in2.62 mm N/A 90 N/A 0.516 in13.11 mm N/A 0.003 in0.08 mm N/A -615 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS614 KALREZ-90 N/A
188440 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.103 in2.62 mm N/A 90 N/A 0.469 in11.91 mm N/A 0.003 in0.08 mm N/A -614 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS613 KALREZ-90 N/A
188441 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.103 in2.62 mm N/A 90 N/A 0.391 in9.93 mm N/A 0.003 in0.08 mm N/A -613 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS611 KALREZ-90 N/A
188442 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 0.344 in8.74 mm N/A 0.003 in0.08 mm N/A -611 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS610 KALREZ-90 N/A
188443 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 0.266 in6.76 mm N/A 0.003 in0.08 mm N/A -610 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS757 KALREZ-90 N/A
188444 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.040 in1.02 mm N/A 90 N/A 0.100 in2.54 mm N/A 0.003 in0.08 mm N/A -757 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS756 KALREZ-90 N/A
188445 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.040 in1.02 mm N/A 90 N/A 0.070 in1.78 mm N/A 0.003 in0.08 mm N/A -756 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS562 KALREZ-90 N/A
188446 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 6.845 in173.86 mm N/A 0.003 in0.08 mm N/A -562 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS561 KALREZ-90 N/A
188447 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 6.72 in170.69 mm N/A 0.003 in0.08 mm N/A -561 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS575 KALREZ-90 N/A
188448 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 6.695 in170.05 mm N/A 0.003 in0.08 mm N/A -575 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS559 KALREZ-90 N/A
188449 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 6.470 in164.34 mm N/A 0.003 in0.08 mm N/A -559 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS558 KALREZ-90 N/A
188450 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 6.345 in161.16 mm N/A 0.003 in0.08 mm N/A -558 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS557 KALREZ-90 N/A
188451 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 6.22 in157.99 mm N/A 0.003 in0.08 mm N/A -557 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS556 KALREZ-90 N/A
188452 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 6.095 in154.81 mm N/A 0.003 in0.08 mm N/A -556 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS555 KALREZ-90 N/A
188453 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 5.97 in151.64 mm N/A 0.003 in0.08 mm N/A -555 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS554 KALREZ-90 N/A
188454 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 5.845 in148.46 mm N/A 0.003 in0.08 mm N/A -554 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS553 KALREZ-90 N/A
188455 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 5.72 in145.29 mm N/A 0.003 in0.08 mm N/A -553 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS552 KALREZ-90 N/A
188456 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 5.595 in142.11 mm N/A 0.003 in0.08 mm N/A -552 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS551 KALREZ-90 N/A
188457 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 5.47 in138.94 mm N/A 0.003 in0.08 mm N/A -551 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS550 KALREZ-90 N/A
188458 		N/A BS Standard O-Ring N/A Perfluoroelastomer N/A 0.070 in1.78 mm N/A 90 N/A 5.345 in135.76 mm N/A 0.003 in0.08 mm N/A -550 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
Unit of Measure
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