Description

When you’re dealing with hydraulic leaks or rebuilding cylinders, having the right seal makes all the difference between a job that holds and one that fails in the field. These 3-3/4 inch ID Buna-N o-rings are built for the kind of pressure and temperature swings your equipment dishes out every day, keeping fluid where it belongs so you can get back to work.

What You’re Getting

Precise 3-3/4 inch inside diameter and 4-1/8 inch outside diameter for exact fitment
3/16 inch cross-section provides the right balance of sealing and flexibility
70 durometer Buna-N rubber handles hydraulic oils, diesel fuel, and temperature extremes
Pack of 10 means you’ll have spares when the next repair comes up

Built for Real Farm Work

These seals are designed for use in plumbing, hydraulics, heavy equipment, automotive, and irrigation systems where reliable sealing is critical. Whether you’re working on loader cylinders, three-point hitch systems, or power steering components, this size fits a wide range of applications across different makes and models of farm equipment.

Made to Last

The 70 durometer Buna-N rubber construction gives you the durability to handle hydraulic pressures and the flexibility to seal properly even when temperatures swing from winter cold to summer heat. This material resists hydraulic oils and most petroleum products, so it won’t swell or break down like cheaper seals.

Good to Know

Keep these o-rings clean during installation and lightly lubricate with the system fluid to help them seat properly. A light coating of hydraulic oil on the seal makes installation easier and helps prevent nicking the rubber on sharp edges. Store the extras in a cool, dry place away from sunlight to keep them ready for the next repair.