140X4MM Buna-N Nitrile (70A) Metric O-Ring, 70A Durometer - 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 on metric equipment and need the exact o-ring to seal it? A worn or wrong-size o-ring lets fluid weep past the joint and drops pressure.

This Beaver Island Parts Company replacement o-ring is a single 140 x 4 mm metric o-ring (140mm inside diameter by 4mm cross-section), molded in 70A Buna-N nitrile rubber.

Full Compatibility: 140 x 4 mm is a common metric o-ring size used across pumps, filters, valves and housings worldwide. If your application calls for a 140mm ID x 4mm section 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.

We are an American family-owned and operated small business committed to providing high-quality replacement parts and honest fitment information.