PACKING (P/N ms28774-330) - New Surplus
P/N: ms28774-330
Category: Seals
This product requires a custom quote. Please contact our sales team for pricing information or submit an RFQ (Request for Quote).
Available Inventory
| Condition | Stock |
|---|---|
| New Surplus | 23 Available |
Product Description
The MS28774-330 is a PTFE back-up ring designed to prevent O-ring extrusion in aircraft hydraulic and pneumatic systems. This single-turn, scarf-cut packing retainer supports the primary seal under system pressure, extending seal life in high-pressure applications. Installed in standard grooves per SAE AS8791 specifications, the back-up ring works alongside O-rings in hydraulic actuators, cylinders, and pneumatic components.
Proper installation in the groove below the O-ring prevents extrusion damage during pressure cycling. Reference the applicable component maintenance manual (CMM) for groove dimensions and installation procedures specific to your aircraft system.
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 PACKING (P/N ms28774-330)?
The MS28774-330 is a PTFE back-up ring designed to prevent O-ring extrusion in aircraft hydraulic and pneumatic systems. This single-turn, scarf-cut packing retainer supports the primary seal under system pressure, extending seal life in high-pressure applications.
What material is the ms28774-330 made from?
Aircraft seals and O-rings are manufactured from various elastomers including nitrile (Buna-N), fluorocarbon (Viton), silicone, and PTFE depending on the application. The PACKING meets aviation specifications for its intended use. Contact us for specific material data.
Can I order the ms28774-330 in bulk quantities?
Yes, we stock seals and gaskets in quantity and offer bulk pricing. Submit a Request for Quote (RFQ) for volume orders, or call (904) 998-9101 for immediate quantity availability on the ms28774-330.
What is the shelf life of the ms28774-330?
Elastomeric seals have manufacturer-specified shelf lives that vary by material and storage conditions. We follow industry standards for cure date tracking and proper climate-controlled storage. Contact us for shelf life details on the ms28774-330.