On this parts fiche the Nut,spring 4mm is the most specified component.
The Nvs501sh Today 2004 (4) Japan Af61-120 F-7 consists of eleven pieces with the Step,floo*nh158r* being the most expensive.
Some items from this specific schematic: Cover,floor Under, Band B,battery, Screw,4x12, Screw 5x12.