Self Locking Nut 24mm Fits: Phoenix Models T10 Rotary Tillers Sicma Models ST Rotary Tillers  

Self-Locking Nut 25 x 1.5, Grooming Mower Spindle Nut Secures Pulley. Spanner Type  Fits: Sicma Model FA/GM Grooming Mowers First Choice Model GM30 Grooming Mowers Kioti® Model

Nut 12mm PF UNI 5587  

Self-Locking Nut M35 x 1.5 Also can use 3514101035 Fits: Sicma Models SF/SD/RD Rotary Tillers Phoenix Models T15-72/80/90-T20-72/80/90 Rotary Tillers