The 629004 retainer ring is an OEM Continental engine retaining component used to secure internal parts within engine assemblies such as accessory cases, shafts, gears, or bearing structures. It functions as a locking element that holds components in position under vibration, thermal expansion, and continuous rotational loads in aircraft piston engine operation.

It is a precision-formed steel ring designed for tight fitment in machined grooves to prevent axial movement of critical engine parts.

Key features include:

OEM Continental retainer ring
Precision-formed steel construction
Secures internal engine components in fixed position
Designed for high-vibration aviation environments
Fits into machined grooves for axial retention
Maintains alignment of gears, shafts, or bearings (application dependent)
Resistant to deformation under thermal cycling
Used in accessory case and internal engine assemblies
Compatible with Continental piston engine configurations (IPC-dependent use)
Used in certified engine maintenance and overhaul procedures