O.S. Engine OS44925300 M4X110 Silencer Screw for F-5040 and FSa-110  [OS44925300]

Mounting screw specifications

This item, O.S. Engine OS44925300, is an M4X110 threaded silencer assemble screw intended for silencers referenced as F-5040 and FSa-110 on RC models. It is the attachment point between the engine outlet and the muffler, designed to cope with the vibration levels typical of nitro setups.

When installing, always hand-start the thread to ensure correct engagement and alignment. Prevent cross-threading by taking care during initial turns, tighten until seated securely but avoid excessive torque, and visually inspect the connection for gaps or misalignment after the first operating session.

Keeping the exhaust components correctly positioned reduces undue load on the silencer and the manifold, and helps maintain consistent engine behavior by preserving intended exhaust routing and backpressure characteristics.