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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
28 X 6 KALREZ-70 N/A
163541
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 70 N/A 28.00 mm N/A O-rings are used in the military, automotive,
28 X 6 KALREZ-75 N/A
163542
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 75 N/A 28.00 mm N/A O-rings are used in the military, automotive,
28 X 6 KALREZ-90 N/A
163543
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 90 N/A 28.00 mm N/A O-rings are used in the military, automotive,
28.17 X 3.53 KALREZ-70 N/A
163544
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 216 N/A 3.53 mm N/A 70 N/A 28.17 mm N/A O-rings are used in the military, automotive,
28.17 X 3.53 KALREZ-75 N/A
163545
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 216 N/A 3.53 mm N/A 75 N/A 28.17 mm N/A O-rings are used in the military, automotive,
28.17 X 3.53 KALREZ-90 N/A
163546
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 216 N/A 3.53 mm N/A 90 N/A 28.17 mm N/A O-rings are used in the military, automotive,
28.24 X 2.62 KALREZ-70 N/A
163547
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 122 N/A 2.62 mm N/A 70 N/A 28.24 mm N/A O-rings are used in the military, automotive,
28.24 X 2.62 KALREZ-75 N/A
163548
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 122 N/A 2.62 mm N/A 75 N/A 28.24 mm N/A O-rings are used in the military, automotive,
28.24 X 2.62 KALREZ-90 N/A
163549
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 122 N/A 2.62 mm N/A 90 N/A 28.24 mm N/A O-rings are used in the military, automotive,
28.3 X 1.78 KALREZ-70 N/A
163550
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 24 N/A 1.78 mm N/A 70 N/A 28.30 mm N/A O-rings are used in the military, automotive,
28.3 X 1.78 KALREZ-75 N/A
163551
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 24 N/A 1.78 mm N/A 75 N/A 28.30 mm N/A O-rings are used in the military, automotive,
28.3 X 1.78 KALREZ-90 N/A
163552
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 24 N/A 1.78 mm N/A 90 N/A 28.30 mm N/A O-rings are used in the military, automotive,
28.4 X 2.7 KALREZ-70 N/A
163553
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.70 mm N/A 70 N/A 28.40 mm N/A O-rings are used in the military, automotive,
28.4 X 2.7 KALREZ-75 N/A
163554
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.70 mm N/A 75 N/A 28.40 mm N/A O-rings are used in the military, automotive,
28.4 X 2.7 KALREZ-90 N/A
163555
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.70 mm N/A 90 N/A 28.40 mm N/A O-rings are used in the military, automotive,
28.5 X 1.5 KALREZ-70 N/A
163556
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 1.50 mm N/A 70 N/A 28.50 mm N/A O-rings are used in the military, automotive,
28.5 X 1.5 KALREZ-75 N/A
163557
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 1.50 mm N/A 75 N/A 28.50 mm N/A O-rings are used in the military, automotive,
28.5 X 1.5 KALREZ-90 N/A
163558
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 1.50 mm N/A 90 N/A 28.50 mm N/A O-rings are used in the military, automotive,
28.5 X 2 KALREZ-70 N/A
163559
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A S29 N/A 2.00 mm N/A 70 N/A 28.50 mm N/A O-rings are used in the military, automotive,
28.5 X 2 KALREZ-75 N/A
163560
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A S29 N/A 2.00 mm N/A 75 N/A 28.50 mm N/A O-rings are used in the military, automotive,
28.5 X 2 KALREZ-90 N/A
163561
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A S29 N/A 2.00 mm N/A 90 N/A 28.50 mm N/A O-rings are used in the military, automotive,
28.5 X 2.5 KALREZ-70 N/A
163562
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.50 mm N/A 70 N/A 28.50 mm N/A O-rings are used in the military, automotive,
28.5 X 2.5 KALREZ-75 N/A
163563
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.50 mm N/A 75 N/A 28.50 mm N/A O-rings are used in the military, automotive,
28.5 X 2.5 KALREZ-90 N/A
163564
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.50 mm N/A 90 N/A 28.50 mm N/A O-rings are used in the military, automotive,
28.5 X 3 KALREZ-70 N/A
163565
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 70 N/A 28.50 mm N/A O-rings are used in the military, automotive,
Unit of Measure
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