RETAINER,PACKING (P/N ms28774-135) - New Surplus
P/N: ms28774-135
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 | 7 Available |
Product Description
The MS28774-135 is a PTFE backup ring conforming to MS28774 (SAE AS8791) specifications. This single-turn, scarf-cut retainer prevents O-ring extrusion under pressure in aircraft hydraulic systems. Positioned behind the elastomer seal in the gland groove, it acts as a non-energized support element during high-pressure operation.
Commonly installed in landing gear, flight control, and engine hydraulic assemblies. Installation follows aircraft maintenance manual procedures and applicable gland standards for proper seating and function.
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 ms28774-135)?
The MS28774-135 is a PTFE backup ring conforming to MS28774 (SAE AS8791) specifications. This single-turn, scarf-cut retainer prevents O-ring extrusion under pressure in aircraft hydraulic systems.
What material is the ms28774-135 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 meets aviation specifications for its intended use. Contact us for specific material data.
Can I order the ms28774-135 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 ms28774-135.
What is the shelf life of the ms28774-135?
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 ms28774-135.