This is a Spinner Adapter Kit by Great Planes.FEATURESAdapter kit for aluminum spinnersThis steel adapter kit tightens the backplate & propeller onto the engine, then using a single bolt-on design, holds & centers each spinner perfectly on its baseplate.Machined for accuracyInstallation instructions provided on the header cardThis spinner adapter kit will fit the following engines:O.S. FS 26-52 SurpassO.S. FS-70 UltimateINCLUDES(1) Propeller Nut(1) Propeller Jam Nut(1) Propeller Washer(1) Aluminum Backplate BushingREQUIREMENTS12mm Wrench To Tighten Propeller NutAluminum Spinner w/Center Mounting Hole10-32 BoltSPECIFICATIONSShaft Size: 1/4-28Jam Nut Length: 15/16" (24mm)Backplate Bushing Inner Diameter: 1/4"Outer Diameter: 3/8"COMMENTSThis adapter fits the FS-70 Ultimate not the regular FS-70.
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