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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
127 X 3 KALREZ-90 N/A
158992 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 90 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 3.5 KALREZ-70 N/A
158993 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 70 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 3.5 KALREZ-75 N/A
158994 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 75 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 3.5 KALREZ-90 N/A
158995 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 90 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 4 KALREZ-70 N/A
158996 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 70 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 4 KALREZ-75 N/A
158997 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 75 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 4 KALREZ-90 N/A
158998 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 90 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 5 KALREZ-70 N/A
158999 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 70 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 5 KALREZ-75 N/A
159000 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 75 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 5 KALREZ-90 N/A
159001 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 90 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 5.33 KALREZ-70 N/A
159002 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A BS863 N/A 5.33 mm N/A 70 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 5.33 KALREZ-75 N/A
159003 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A BS863 N/A 5.33 mm N/A 75 N/A 127.00 mm N/A O-rings are used in the military, automotive,
127 X 5.33 KALREZ-90 N/A
159004 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A BS863 N/A 5.33 mm N/A 90 N/A 127.00 mm N/A O-rings are used in the military, automotive,
128 X 2.5 KALREZ-70 N/A
159005 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.50 mm N/A 70 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 2.5 KALREZ-75 N/A
159006 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.50 mm N/A 75 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 2.5 KALREZ-90 N/A
159007 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.50 mm N/A 90 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 3 KALREZ-70 N/A
159008 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 70 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 3 KALREZ-75 N/A
159009 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 75 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 3 KALREZ-90 N/A
159010 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 90 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 3.5 KALREZ-70 N/A
159011 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 70 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 3.5 KALREZ-75 N/A
159012 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 75 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 3.5 KALREZ-90 N/A
159013 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 90 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 3.55 KALREZ-70 N/A
159014 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.55 mm N/A 70 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 3.55 KALREZ-75 N/A
159015 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.55 mm N/A 75 N/A 128.00 mm N/A O-rings are used in the military, automotive,
128 X 3.55 KALREZ-90 N/A
159016 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.55 mm N/A 90 N/A 128.00 mm N/A O-rings are used in the military, automotive,
Unit of Measure
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