RETAINER,PACKING (P/N ms28774-004) - New Surplus
P/N: ms28774-004
Category: Studs, Inserts & Fastener Hardware
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Available Inventory
| Condition | Price | Stock |
|---|---|---|
| New Surplus | $1.75 | 11 Available |
Product Description
The MS28774-004 is a PTFE packing retainer (back-up ring) that prevents O-ring extrusion under high pressure in aircraft hydraulic and pneumatic systems. This scarf-cut ring sits adjacent to the elastomer seal in an O-ring groove, providing structural support during pressurized operation. Manufactured to Military Standard MS28774, it's installed per MIL-G-5514 groove geometry specifications.
Common in landing gear actuators, flight control systems, and engine components where fluid sealing integrity is critical. The retainer extends seal life by reducing radial and axial extrusion forces.
Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.
Frequently Asked Questions
What is the RETAINER,PACKING (P/N ms28774-004)?
The MS28774-004 is a PTFE packing retainer (back-up ring) that prevents O-ring extrusion under high pressure in aircraft hydraulic and pneumatic systems. This scarf-cut ring sits adjacent to the elastomer seal in an O-ring groove, providing structural support during pressurized operation.
Does the ms28774-004 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 ms28774-004 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 ms28774-004.
Can I order the ms28774-004 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.
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