O.S. Prop Locknut FS-120

Tower Stock# OSMG7928  •  Manufacturer Stock# 45510100
O.S. Prop Locknut FS-120 (large view)
Notes from our tech department:
This is a replacement locknut and washer set for the FS90 and 120surpass and
the 120 surpass w/o pump. .

Features: This helps keep the propellor stay on the engine in the case of
backfire or detonation.

The inner nut screws into the outer and locks it in place.

1- inner prop nut 5/16-24 thread
1- outer prop nut 5/16-24 thread
1- prop washer I.D. 12.5mm O.D. 32mm



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