JIS S26 Buna-N Nitrile (70A) Metric O-Ring, 70A Durometer, 25.5mm ID x 2mm CS (1.004" x 0.079", 29.5mm OD) - Precision-Molded Replacement Sealing Ring for Pumps, Valves & Fittings

FINAL SALE - NO RETURNS. THIS IS A STANDARD CATALOGUE SIZE; CONFIRM YOUR INSIDE DIAMETER, CROSS-SECTION AND MATERIAL BEFORE ORDERING.

Every dimension, material and durometer for this o-ring is published above. Because these are standard catalogue sizes chosen by measurement rather than by pump model, they ship as final sale. If we send the wrong item, or it arrives damaged or defective, we replace it free of charge - that never changes.

Chasing a leak or a slow drip and need the exact metric o-ring size to seal it for good? A worn or wrong-size o-ring lets fluid weep past the joint, drops pressure, and can damage the equipment around it.

This Beaver Island Parts Company replacement o-ring is a single JIS S26 o-ring, a standard metric sealing size measuring 25.5mm inside diameter by 2mm cross-section (1.004" ID x 0.079" CS, 29.5mm outer diameter), molded in 70A Buna-N Nitrile rubber.

Full Compatibility: JIS S26 is an international-standard o-ring size used across pumps, valves, filters, fittings and machinery worldwide. If your application calls for a 25.5mm x 2mm o-ring, this is the size.
Installation Note: Clean the groove, inspect the sealing surface, seat the new o-ring without twisting it, and lubricate before assembly.
Pro Tip: Apply Aqua Flex lubricant before installation to ease seating and extend seal life.

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