MS28774-237 - Retainer Ring

Part number MS28774-237 is a spiral backup ring designed for aerospace hydraulic and pneumatic sealing systems. Backup rings are used with O-rings to prevent seal extrusion under high-pressure conditions, improving seal integrity and extending service life.

The MS28774 series generally consists of PTFE (Teflon) spiral-cut backup rings intended for dynamic and static sealing applications in aircraft hydraulic systems.

Specifications

• Part Number: MS28774-237
• Type: Spiral backup ring / anti-extrusion ring
• Material: PTFE (Teflon) or equivalent fluoropolymer
• Color: White
• Application: Aerospace hydraulic and pneumatic sealing systems

Dimensions

• Inside Diameter (ID): 86.00 mm (3.386 in)
• Outside Diameter (OD): 91.36 mm (3.597 in)
• Height / Thickness: 1.25 mm (0.049 in)

Features

• Prevents O-ring extrusion under high pressure
• Spiral-cut design allows easy installation over shafts and into grooves
• Low friction and chemically resistant material
• Compatible with aerospace hydraulic fluids
• Commonly used in aircraft actuators, valves, pumps, and hydraulic assemblies