This F-6 diagram displays the required parts for the Nt400 Bros 1989 (k) Japan Nc25-105 F-6.
The Bolt,flange,10x40 is the cheapest item from this partsfiche.
Some items from this specific schematic: Stem Comp.,strg., Seal,head Dust, Dust Seal,strg.hd, Thread Comp.,top.