This is the 3/8-24 Jam Nut (Long) Adapter Kit from Tru-Turn.|
Tapped 10-32 for cone screw.
Used to mount Tru-Turn aluminum spinners onto the following engines:
O.S. Max 1.60 FX Any O.S. Max 2.40-3.00 twin
O.S. Max FR5-300 O.S. Max BGX-1 3500
One adapter nut
9/16" end wrench to tighten
Tru-Turn aluminum spinner
Crankshaft thread size: 3/8" - 24
Spinner mounting bolt thread size: 10-32
The steel adapter nut screws onto the crankshaft with a second jam
nut, locking the spinner backplate and prop into place. The
spinner is then attached by a spinner mounting bolt ("Cone Screw")
which screws into the adapter.