Stens 285-020 Belt Cover Knob Replaces: Lexmark: 1-323385 Hustler: 075291 Fits Lexmark: Metro and Viking with 36", 48" and 52" decks; Laser Z and Laser Z Triton deck group with 52", 60" and 72" decks; turf tracker Hydro with floating decks Thread: 5/16"-18