Name for replacement part

[Zenith]

Can someone please tell me what this is i need a new part because a thread broke and need a new one. On the end
i need help identifying this part

 

[WVNed]

Did you loose a tooth on the gear of your clutch bell?
https://www.amainhobbies.com/search?s=clutch+bell

 

[Chubaka]

What motor is this on? The threaded parts I know of is some clutchbells are threaded for threaded pinions, or the crank on the engine.

 

[Maximum_Quake_Pro.com]

Let me know what model, number of teeth, and i will mail you one, as long as your in the states