RING (P/N 518) - New Surplus

Part number 518 is a backup ring designed to support and protect O-rings in hydraulic housings and fluid system interfaces. This metal ring prevents O-ring extrusion under high pressure while maintaining seal integrity in aircraft hydraulic assemblies. Commonly manufactured from steel or aluminum per AS8791 specifications, the ring installs behind the primary O-ring in grooved cavities.

Used throughout general aviation and commercial aircraft hydraulic systems, fuel system components, and engine assemblies. Installation must follow your aircraft maintenance manual and approved parts catalog requirements.

What is the RING (P/N 518)?

Part number 518 is a backup ring designed to support and protect O-rings in hydraulic housings and fluid system interfaces. This metal ring prevents O-ring extrusion under high pressure while maintaining seal integrity in aircraft hydraulic assemblies.

What conditions is the 518 available in?

The 518 is currently available in the following conditions: New Surplus. Each condition reflects the part's maintenance history and certification status per FAA standards.

How do I get pricing for the 518?

The 518 requires a custom quote. Submit a Request for Quote (RFQ) through our website or call our sales team at (904) 998-9101 for immediate pricing assistance.

Do you offer expedited shipping for the 518?

Yes, we offer same-day processing on in-stock items and provide 24/7 AOG (Aircraft on Ground) support for urgent needs. Standard, expedited, and overnight shipping options are available.