to make this item your going to need the program solid works which if you don't already have your going to have to buy, but the software is very expensive and isn't easy to acquire.
what your going to want to do is first open a sketch on the top plane and draw a circle and scale it to about 1.5 inches. you must then scale a circle of the same diameter 3 inches above the first circle. sweep the two circles and turn the two sketches into a cylinder. then you must make a circle about 2 inches ant the top portion of the cylinder widening it out for looks. take the sketch you just made and turn it into a cylinder .5 inch tall using the extruded boss tool. finally, you make another cylinder with a diameter of .2 directly in the center of the cylinder that is two inches in diameter.( this will later be used to mate two components) with this part done you are 1/3 the way complete.