This is a 3/8"-24 Extra Long Propeller Adapter Nut from Dave Brown.

This is an Adapter Kit Used To Mount Spinners onto the following engines:

Will fit the following engines:

OS Max 1.08 FSR, FT-240, FT-300 and FR-300, K&B 1.00,

Magnum XL-180AR, Enya VT-240 Twin or any engine with a 3/8"-24 threaded prop shaft.

Features:

Plain black, CNC machined steel construction.

Use with 3-1/4" to 4" spinners.

This prop adapter kit tightens the backplate and propeller onto the

engine, then using a single bolt-on design, holds and centers

each spinner perfectly on its baseplate.

INCLUDES: (1) Propeller Adapter Nut

(1) Propeller Washer

REQUIRES: 1/2" Wrench

Spinner Cone & Bolt

Backplate

Propeller

SPECS: Crankshaft Thread Size: 3/8-24

Spinner End Thread Size: 10-32

Nut Length: 1.625"