404557 Socket Nut M40x1.5 Vaderstad

404557 socket nut (crown / slotted nut) M40×1.5 is a heavy‑duty locking fastener for Vaderstad seed drills and tillage machines. Fine‑pitch M40×1.5 thread allows precise preload adjustment for tapered roller bearings and wheel‑axle assemblies. The slotted crown design enables installation of split cotter pin to prevent nut loosening under heavy vibration in field conditions. Manufactured from high‑grade treated steel for high mechanical strength and thread stability. Strict OEM dimensional tolerance ensures direct‑fit replacement for worn or damaged original nuts on Vaderstad Rapid, Tempo, Carrier and Spirit series equipment。