The MS28774-015 is a military standard Teflon packing retainer designed for use in aerospace hydraulic and fluid system sealing assemblies. Manufactured in accordance with the MS28774 specification, this component serves as a support and backup element for sealing packages, helping maintain proper seal positioning and ensuring reliable performance under demanding operating conditions.

Constructed from PTFE (Teflon), the retainer provides excellent resistance to hydraulic fluids, fuels, lubricants, and a wide range of aviation chemicals. The material's low coefficient of friction and outstanding wear resistance help reduce seal damage while maintaining dimensional stability across a broad operating temperature range.

The MS28774-015 is commonly used in conjunction with O-rings and other sealing elements in aircraft valves, actuators, pumps, cylinders, and hydraulic fittings. By supporting the primary seal and helping prevent extrusion under pressure, the retainer contributes to maintaining leak-free system operation and extending the service life of the sealing assembly.

Designed for OEM and MRO applications, the MS28774-015 provides dependable performance in commercial, military, and general aviation aircraft when installed according to approved maintenance procedures and replaced during scheduled seal servicing as required.

Key Features

- Part Number: MS28774-015
- Manufacturer: Military Standard (MS)
- Component: Teflon Packing Retainer
- Material: PTFE (Teflon)
- Specification: MS28774 Military Standard
- Function: Supports and retains packing and seal assemblies under pressure
- Application: Aircraft hydraulic, fuel, lubrication, and fluid system sealing assemblies
- Features: Low friction, excellent chemical resistance, wear resistance, and dimensional stability
- Maintenance: Suitable for OEM maintenance, repair, and overhaul (MRO) applications