O-Rings

O-Rings — New & Used

O-rings are circular sealing components used to prevent leaks of fluids or gases by creating tight seals between mating parts. They are essential in hydraulic, pneumatic, plumbing, machinery, and equipment maintenance — providing reliable sealing for shafts, cylinders, fittings and flanges.

At Surplus Select, we offer a wide selection of new and used OEM O-rings in various sizes, materials, and hardness ratings — suitable for hydraulic cylinders, pneumatic systems, pumps, valves, fittings and general maintenance tasks. Surplus pricing helps service shops and maintenance teams keep spare seals on hand affordably.

Price Match — We match any authorized distributor on identical in-stock parts, so you can source O-rings at surplus pricing with confidence.

Trade-In Credit — Have quality new surplus items? Trade them in for store credit toward the seals you need.

Fast U.S. Shipping — Most orders ship same or next business day so you can keep maintenance moving.

Find Your O-Ring Fast (Search-First)

Search by part number or dimensions (e.g., OD 50 mm, cross-section 3 mm, NBR O-ring 1/4″ ID, viton O-ring 12 mm OD).
No part number? Try specs like “Buna-N O-ring 3/8″”, viton seal 50 mm”, O-ring metric 25 mm OD 4 mm CS”.
Need specific attributes? Add material (NBR, Viton, EPDM), hardness (shore-A), temperature rating, or application type to narrow results.

Applications & Use Cases

Hydraulics & Pneumatics: Seal cylinders, valves, actuators, pumps and fittings against fluid or air leaks.
Pumps, motors & gearboxes: Provide reliable sealing for shafts, housings, and rotating parts to prevent oil or lubricant loss.
Plumbing & fluid systems: Use O-rings in pipe fittings, valves, couplings and hose connections to ensure leak-free joints.
Maintenance & repair: Replace worn or degraded seals and keep spare O-rings on hand for quick fixes and rebuilds.
General machinery & fabrication: Use in fixtures, jigs, enclosures, and any application needing a tight seal between components.

Why Buy O-Rings from Surplus Select

New & Used Options: OEM O-rings in a wide range of sizes, materials and hardness available at surplus prices.
Wide Selection: Multiple diameters, cross-sections, materials, and compatibility for many systems and applications.
Cost-Effective Spares & Maintenance: Surplus stock helps reduce sealing and maintenance costs without sacrificing reliability.
Fast Shipping: Most orders ship same or next business day — ideal for urgent repair or maintenance jobs.