121-4318 – Toro Hex Head Shoulder Bolt (1U) (Genuine OEM Part) Stihl BGA 300 915102 – 2040 ZT

915102 – 2040 ZT

Zero-turn and riding mower electrical assemblies

Cylinder)HS 81 T (Crankcase

or internal deposits

07100914 – Tire 13×6

121-4318 – Toro Hex Head Shoulder Bolt (1U) (Genuine OEM Part) Stihl BGA 300 915102 – 2040 ZT121 4318 Toro Hex Head Shoulder Bolt (1U) (Genuine OEM Part) The Toro 121 4318 Hex Head Shoulder Bolt (1U) is a genuine OEM fastener used in the cutter head and grinder head assemblies on select Toro STX 38 stump grinders. This shoulder bolt is engineered to provide precise spacing, secure retention, and controlled pivot or mounting support in high load, high vibration grinding applications. Manufactured to Toro specifications, this bolt ensures