Mugen MTX-5 spring steel Engine Nut by Arrowmax AM-MTX-H0704  [AM-MTX-H0704]

Engine nut for MTX-5

This Arrowmax AM-MTX-H0704 engine nut is a small-scale RC replacement part intended for Mugen MTX-5 applications, manufactured from spring steel to preserve clamping force under vibration. It serves the specific role of securing a nitro engine to the chassis flange and is described here strictly as an RC accessory.

Fit and compatibility: the part is suitable for MTX-5 style engine mounts where a captive or mating nut is required, and is intended to work with matching Mugen Seiki threaded interfaces. Before assembly, verify thread condition and seating face on both engine and chassis to ensure correct alignment.

Installation and tuning role: install the nut by aligning the engine flange and advancing the nut until a firm preload is achieved, then set final retention to the usual RC engine mounting practice for your setup. The spring steel construction helps maintain clamping under thermal cycles and vibration, which aids repeatable engine positioning during tuning and track use.