This is an RC-scale silencer assemble screw supplied under the O.S. Engine OS44825400 designation, sized M4x95 for fastening model exhaust silencers. It is intended as a replacement or spare fastener for radio-controlled model exhaust assemblies that accept M4 threaded hardware, and its role is to secure the silencer to the exhaust flange while keeping alignment for consistent back-pressure and tuning.
Installation notes: start the threaded engagement by hand to avoid cross-threading, confirm the silencer and exhaust pipe are aligned before final tightening, and inspect the fastening after running to ensure there is no loosening or exhaust leakage at the joint. Keep the part described and used strictly as an RC model accessory.
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