Description

When you’re dealing with hydraulic leaks on big cylinders or large-bore equipment, finding the right size O-ring can make or break your repair. O-rings appear everywhere on modern equipment – hydraulic fittings, fuel system connections, oil filter housings, coolant joints, and air system fittings all depend on these simple but crucial seals. One failed O-ring can drain hydraulic systems, create fuel leaks, or allow air into critical systems. This 5-inch inside diameter O-ring is built for the bigger jobs where standard sizes just won’t cut it.

What You’re Getting

High-quality Buna-N rubber that resists oil, hydraulic fluid, and temperature extremes
Precise 5-inch inside diameter fits large cylinders and equipment housings perfectly
70 durometer rating provides the right balance of flexibility and sealing strength
Ten O-rings per package so you’ll have spares for future repairs
Quarter-inch width handles high pressure applications without rolling or extruding

Built for Real Farm Work

For use in plumbing, hydraulics, heavy equipment, automotive, irrigation and more. These larger O-rings are perfect for sealing hydraulic cylinders on loaders, three-point lift systems, and implements that need big-bore cylinders to handle heavy loads. Whether you’re rebuilding a cylinder on your hay squeeze, fixing a leak in your manure spreader hydraulics, or servicing equipment with large hydraulic components, this size handles the serious work.

Made to Last

Despite their simplicity, O-rings face harsh conditions. Heat cycles cause them to harden and lose elasticity. Chemical exposure from fuels and fluids degrades rubber compounds. This Buna-N compound is specifically formulated to resist hydraulic oils and withstand the temperature swings your equipment faces from summer heat to winter cold. The 70 durometer rating gives you reliable sealing without being too hard to install.

Good to Know

Keep O-rings clean during installation and use a thin film of hydraulic fluid to help them seat properly. Compression set occurs when O-rings remain squeezed in one position too long. Mechanical damage happens during installation or from system pressure cycles. Take your time during assembly – rushing the job usually means having to do it over when the O-ring gets pinched or damaged.