AS568-412 Buna-N Nitrile (70A) O-Ring, 70A Durometer, 2-7/8" ID x 1/4" CS (2.850" x 0.275" Actual, 3.400" OD) - Precision-Molded Replacement Sealing Ring for Pumps, Valves, Filters, Gearboxes & Hydraulics

Chasing a leak or a slow drip and need the exact 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 AS568-412 o-ring, a universal industry-standard size. Its nominal size is 2-7/8" inside diameter by 1/4" cross-section; the actual measured dimensions are 2.850" ID by 0.275" CS, held to a tolerance of ±0.020" on the ID and ±0.006" on the CS, for a 3.400" outer diameter. It is molded in 70A Buna-N Nitrile rubber and is a drop-in replacement for any standard dash-412 o-ring.

Full Compatibility: AS568-412 is a standard o-ring dash size used across pumps, filters, valves, gearboxes, hydraulic fittings, plumbing and countless machines. If your application calls for a 2.850" ID x 0.275" CS 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. No special tools are required for most o-ring changes.
Pro Tip: Apply Aqua Flex lubricant to the o-ring 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 straightforward, honest fitment information so you can fix it once and get back to work.