RETAINER,PACKING (P/N ms28774-013) - New Surplus

The MS28774-013 is a PTFE packing retainer (backup ring) that prevents O-ring extrusion in hydraulic and pneumatic fluid power systems. This single-turn, scarf-cut geometry component conforms to SAE AS8791/MIL-R-8791 specifications. Installed adjacent to the extrusion gap and opposite system pressure, the retainer supports the primary O-ring seal in glands operating under high pressure differentials.

Used in aircraft hydraulic actuators, landing gear systems, and engine components where seal integrity is critical. Installation requires verification of gland dimensions per MIL-G-5514 and compliance with applicable aircraft maintenance manual procedures.

What is the RETAINER,PACKING (P/N ms28774-013)?

The MS28774-013 is a PTFE packing retainer (backup ring) that prevents O-ring extrusion in hydraulic and pneumatic fluid power systems. This single-turn, scarf-cut geometry component conforms to SAE AS8791/MIL-R-8791 specifications.

Does the ms28774-013 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The RETAINER,PACKING conforms to its applicable AN (Air Force-Navy), MS (Military Standard), or NAS (National Aerospace Standard) specification. Contact us for specific specification details.

What material is the ms28774-013 manufactured from?

Aviation hardware is available in various materials including cadmium-plated steel, stainless steel, aluminum alloy, and titanium depending on the application. Contact us for material certification and specifications for the ms28774-013.

Can I order the ms28774-013 in custom quantities?

Yes, we sell hardware in various quantities from single units to bulk lots. The RETAINER,PACKING is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.