O.S. Engine OS22826131 Adaptor Fixing Screw CSM3X8 No.4  [OS22826131]

Adaptor fixing screw for RC engine adaptors

This O.S. Engine OS22826131 adaptor fixing screw is an RC-scale replacement fastener intended for securing adaptor assemblies on nitro or glow model engines. The product name includes the CSM3X8 designation which identifies the screw form used by adaptor fittings and mounting flanges.

The part acts as a small but necessary component when servicing or rebuilding engine adaptor interfaces, helping maintain correct alignment between the adaptor and engine output. Because it is a purpose-made fixing screw, it is typically used wherever the original adaptor hardware requires a CSM3X8 type fastener.

When replacing worn or lost hardware, confirm the screw matches thread engagement and seating depth for your specific adaptor and crankcase interface before final installation. Routine inspection during engine maintenance helps prevent loosening and maintains reliable adaptor alignment during use.