This part fits your Tiller
Hex jam nut 3/8-24 thd.
Genuine OEM Part - Manufacturer #712-0711
This part fits your Tiller
Hex nut 5/16-18 thd.
Genuine OEM Part - Manufacturer #912-0158
This part fits your Tiller
Hex nut
Genuine OEM Part - Manufacturer #912-0287
This part fits your Tiller
Hex nut, 5/16" 24 thread
Genuine OEM Part - Manufacturer #912-3057