MS28773-16 - Retainer Ring

Part number MS28773-16 is a backup ring used in aerospace and hydraulic sealing applications. Backup rings are installed alongside O-rings to prevent extrusion of the seal material under high pressure, improving sealing reliability and extending service life.

The MS28773 series typically consists of non-metallic backup rings manufactured from PTFE (Teflon) or similar low-friction materials for compatibility with hydraulic fluids and aerospace environments.

Specifications

• Part Number: MS28773-16
• Type: Backup ring / anti-extrusion ring
• Material: PTFE (Teflon) or equivalent fluoropolymer
• Color: White
• Application: Hydraulic and pneumatic sealing systems

Dimensions

• Inside Diameter (ID): 31.11 mm (1.225 in)
• Outside Diameter (OD): 36.65 mm (1.443 in)
• Height / Thickness: 1.85 mm (0.073 in)

Features

• Prevents O-ring extrusion under pressure
• Compatible with aerospace hydraulic systems
• Low friction and chemical-resistant material
• Improves seal life and reliability
• Commonly used in aircraft hydraulic actuators, valves, and fluid systems