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Metric O-Rings are employed in specialized applications and, like the name suggests, are standardized by metric dimensions. With a wide variety of sizes available, Metric O-Rings fill in the gaps left by the standardized AS568 o-ring chart. Metric O-Ring sizing is determined by the o-ring's inside diameter and cross section width. 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.
Metric O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Reference

Cross Section Width

Durometer

Inside Diameter

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Quantity
33 X 2.5 KALREZ-70 N/A
164597
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.50 mm N/A 70 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 2.5 KALREZ-75 N/A
164598
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.50 mm N/A 75 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 2.5 KALREZ-90 N/A
164599
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.50 mm N/A 90 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 3 KALREZ-70 N/A
164600
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 70 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 3 KALREZ-75 N/A
164601
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 75 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 3 KALREZ-90 N/A
164602
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 90 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 3.5 KALREZ-70 N/A
164603
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 70 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 3.5 KALREZ-75 N/A
164604
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 75 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 3.5 KALREZ-90 N/A
164605
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 90 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 4 KALREZ-70 N/A
164606
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 70 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 4 KALREZ-75 N/A
164607
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 75 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 4 KALREZ-90 N/A
164608
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 90 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 4.5 KALREZ-70 N/A
164609
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.50 mm N/A 70 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 4.5 KALREZ-75 N/A
164610
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.50 mm N/A 75 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 4.5 KALREZ-90 N/A
164611
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.50 mm N/A 90 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 5 KALREZ-70 N/A
164612
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 70 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 5 KALREZ-75 N/A
164613
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 75 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 5 KALREZ-90 N/A
164614
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 90 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 6 KALREZ-70 N/A
164615
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 70 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 6 KALREZ-75 N/A
164616
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 75 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33 X 6 KALREZ-90 N/A
164617
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 90 N/A 33.00 mm N/A O-rings are used in the military, automotive,
33.05 X 1.78 KALREZ-70 N/A
164618
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 27 N/A 1.78 mm N/A 70 N/A 33.05 mm N/A O-rings are used in the military, automotive,
33.05 X 1.78 KALREZ-75 N/A
164619
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 27 N/A 1.78 mm N/A 75 N/A 33.05 mm N/A O-rings are used in the military, automotive,
33.05 X 1.78 KALREZ-90 N/A
164620
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 27 N/A 1.78 mm N/A 90 N/A 33.05 mm N/A O-rings are used in the military, automotive,
33.3 X 2.4 KALREZ-70 N/A
164621
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.40 mm N/A 70 N/A 33.30 mm N/A O-rings are used in the military, automotive,
Unit of Measure
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