RETAINER, PACKING BACKUP (P/N ms28773-04) - New Surplus, New
P/N: ms28773-04
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 | 6 Available |
| New | 8 Available |
Product Description
The MS28773-04 is a PTFE backup retainer ring conforming to Military Standard MS28773. This single-turn scarf-cut ring installs in straight-thread tube fitting boss glands to support an O-ring and prevent extrusion under hydraulic pressure. Commonly used in aircraft hydraulic systems, manifolds, and tube fittings where high-pressure fluid containment is critical.
Install the retainer in the specified gland orientation with the companion O-ring per MS28773 specifications and aircraft maintenance documentation.
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 BACKUP (P/N ms28773-04)?
The MS28773-04 is a PTFE backup retainer ring conforming to Military Standard MS28773. This single-turn scarf-cut ring installs in straight-thread tube fitting boss glands to support an O-ring and prevent extrusion under hydraulic pressure.
What material is the ms28773-04 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 RETAINER, PACKING BACKUP meets aviation specifications for its intended use. Contact us for specific material data.
Can I order the ms28773-04 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 ms28773-04.
What is the shelf life of the ms28773-04?
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 ms28773-04.
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