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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
31 X 2.5 KALREZ-90 N/A
164194 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 2.50 mm N/A 90 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 3 KALREZ-70 N/A
164195 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 70 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 3 KALREZ-75 N/A
164196 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 75 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 3 KALREZ-90 N/A
164197 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.00 mm N/A 90 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 3.5 KALREZ-70 N/A
164198 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 70 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 3.5 KALREZ-75 N/A
164199 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 75 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 3.5 KALREZ-90 N/A
164200 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 3.50 mm N/A 90 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 4 KALREZ-70 N/A
164201 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 70 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 4 KALREZ-75 N/A
164202 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 75 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 4 KALREZ-90 N/A
164203 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.00 mm N/A 90 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 4.5 KALREZ-70 N/A
164204 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.50 mm N/A 70 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 4.5 KALREZ-75 N/A
164205 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.50 mm N/A 75 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 4.5 KALREZ-90 N/A
164206 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 4.50 mm N/A 90 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 5 KALREZ-70 N/A
164207 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 70 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 5 KALREZ-75 N/A
164208 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 75 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 5 KALREZ-90 N/A
164209 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 5.00 mm N/A 90 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 6 KALREZ-70 N/A
164210 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 70 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 6 KALREZ-75 N/A
164211 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 75 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31 X 6 KALREZ-90 N/A
164212 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A N/A 6.00 mm N/A 90 N/A 31.00 mm N/A O-rings are used in the military, automotive,
31.12 X 5.33 KALREZ-70 N/A
164213 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 322 N/A 5.33 mm N/A 70 N/A 31.12 mm N/A O-rings are used in the military, automotive,
31.12 X 5.33 KALREZ-75 N/A
164214 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 322 N/A 5.33 mm N/A 75 N/A 31.12 mm N/A O-rings are used in the military, automotive,
31.12 X 5.33 KALREZ-90 N/A
164215 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A 322 N/A 5.33 mm N/A 90 N/A 31.12 mm N/A O-rings are used in the military, automotive,
31.2 X 3.5 KALREZ-70 N/A
164216 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A P31.5 N/A 3.50 mm N/A 70 N/A 31.20 mm N/A O-rings are used in the military, automotive,
31.2 X 3.5 KALREZ-75 N/A
164217 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A P31.5 N/A 3.50 mm N/A 75 N/A 31.20 mm N/A O-rings are used in the military, automotive,
31.2 X 3.5 KALREZ-90 N/A
164218 		N/A Metric Standard O-Ring N/A Perfluoroelastomer N/A P31.5 N/A 3.50 mm N/A 90 N/A 31.20 mm N/A O-rings are used in the military, automotive,
Unit of Measure
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