Hello Mayur
The way to do this is not to try and model a nozzle. The build order for this nozzle in the bottom head is as follows:
1 first model the flange (if there is one at the end of the nozzle)
2 then model a cylinder which acts as the nozzle
3 then model the cone
That is about the only way you can accomplish this.
_________________________
Sincerely,
Ray Delaforce
CADWorx & Analysis Solutions
Hexagon PPM