MUGEN MRX5 7075 HARD spring adjust nut by Arrowmax AM-MRX5-H0755  [AM-MRX5-H0755]

Spring adjust nut for MRX5

This RC-scale spring adjust nut is intended for use with MUGEN MRX-5 shock assemblies and spare parts where threaded spring preload adjustment is used. The part name specifies 7075 HARD as the material class, which identifies it as a high-strength aluminium option for replacement or upgrade of the stock adjuster.

Installation follows standard shock maintenance procedures: remove the shock cap or spring retainer, swap the adjust nut with the stock component, and verify smooth thread engagement before final assembly. No special tools beyond common hobby hex drivers are required, but check fit against your MRX-5 shock top to confirm thread compatibility.

In tuning practice this adjust nut serves only to set spring preload and wheel height increments on MRX-5 setups; it does not alter spring rate or damping by itself, but it provides a robust contact point for repeatable preload adjustments during track tuning or routine maintenance.