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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
320 X 5 KALREZ-75 N/A
164469
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 75 N/A 320.00 mm N/A O-rings are used in the military, automotive,
320 X 5 KALREZ-90 N/A
164470
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 90 N/A 320.00 mm N/A O-rings are used in the military, automotive,
320 X 6 KALREZ-70 N/A
164471
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 70 N/A 320.00 mm N/A O-rings are used in the military, automotive,
320 X 6 KALREZ-75 N/A
164472
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 75 N/A 320.00 mm N/A O-rings are used in the military, automotive,
320 X 6 KALREZ-90 N/A
164473
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 90 N/A 320.00 mm N/A O-rings are used in the military, automotive,
321 X 3.5 KALREZ-70 N/A
164474
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 70 N/A 321.00 mm N/A O-rings are used in the military, automotive,
321 X 3.5 KALREZ-75 N/A
164475
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 75 N/A 321.00 mm N/A O-rings are used in the military, automotive,
321 X 3.5 KALREZ-90 N/A
164476
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 90 N/A 321.00 mm N/A O-rings are used in the military, automotive,
321 X 4 KALREZ-70 N/A
164477
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 70 N/A 321.00 mm N/A O-rings are used in the military, automotive,
321 X 4 KALREZ-75 N/A
164478
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 75 N/A 321.00 mm N/A O-rings are used in the military, automotive,
321 X 4 KALREZ-90 N/A
164479
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 90 N/A 321.00 mm N/A O-rings are used in the military, automotive,
321 X 5 KALREZ-70 N/A
164480
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 70 N/A 321.00 mm N/A O-rings are used in the military, automotive,
321 X 5 KALREZ-75 N/A
164481
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 75 N/A 321.00 mm N/A O-rings are used in the military, automotive,
321 X 5 KALREZ-90 N/A
164482
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 90 N/A 321.00 mm N/A O-rings are used in the military, automotive,
321.5 X 6 KALREZ-70 N/A
164483
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A V325 N/A 6.00 mm N/A 70 N/A 321.50 mm N/A O-rings are used in the military, automotive,
321.5 X 6 KALREZ-75 N/A
164485
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A V325 N/A 6.00 mm N/A 75 N/A 321.50 mm N/A O-rings are used in the military, automotive,
321.5 X 6 KALREZ-90 N/A
164487
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A V325 N/A 6.00 mm N/A 90 N/A 321.50 mm N/A O-rings are used in the military, automotive,
322 X 3.5 KALREZ-70 N/A
164489
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 70 N/A 322.00 mm N/A O-rings are used in the military, automotive,
322 X 3.5 KALREZ-75 N/A
164490
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 75 N/A 322.00 mm N/A O-rings are used in the military, automotive,
322 X 3.5 KALREZ-90 N/A
164491
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 90 N/A 322.00 mm N/A O-rings are used in the military, automotive,
322 X 4 KALREZ-70 N/A
164492
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 70 N/A 322.00 mm N/A O-rings are used in the military, automotive,
322 X 4 KALREZ-75 N/A
164493
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 75 N/A 322.00 mm N/A O-rings are used in the military, automotive,
322 X 4 KALREZ-90 N/A
164494
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 90 N/A 322.00 mm N/A O-rings are used in the military, automotive,
322 X 5 KALREZ-70 N/A
164495
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 70 N/A 322.00 mm N/A O-rings are used in the military, automotive,
322 X 5 KALREZ-75 N/A
164496
N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 75 N/A 322.00 mm N/A O-rings are used in the military, automotive,
Unit of Measure
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