Seals, O-Rings & Gaskets

10+ products

Expected delivery: Tue, Nov 17

Seals, O-rings and gaskets keep fluids in and dirt out of pumps, gearboxes, cylinders, valves and flanges. This subcategory includes radial shaft oil seals, O-rings in standard AS568 dash sizes and metric sizes, O-ring and backup ring kits, quad rings, gasket sheet, cut flange gaskets and sealing washers. Materials include nitrile (Buna-N), FKM, EPDM, silicone and neoprene.

What to check before you order

  • Size. Oil seals are sized by shaft diameter, bore diameter and width. O-rings are sized by inside diameter and cross section, or by AS568 dash number.
  • Material. Nitrile suits most petroleum oils and greases. FKM handles higher temperatures and many fuels and chemicals. EPDM suits water, steam and brake fluid but not petroleum oil. Check a compatibility chart for anything unusual.
  • Durometer. O-rings are commonly 70 Shore A. Harder 90 durometer O-rings resist extrusion at high pressure.
  • Seal design. Single lip or double lip, with or without a spring, and metal or rubber covered outside diameter. Match the old seal.

An O-ring kit in the shop saves time on small repairs. Hydraulic fittings are in hydraulic hose and fittings, bearings are in bearings and bushings, and gasket makers are in sealants and caulk. See all power transmission parts.

Common questions

What is an AS568 O-ring size?

AS568 is the standard US size list for O-rings. Each dash number, such as -214, stands for a specific inside diameter and cross section.

Popular seals, o-rings & gaskets

More in Power Transmission