The Nikon hood for the 18-55 is the HB-45, very low profile and no 'petals'.
Nikon HB-45 Snap-On Lens Hood 4941 B&H Photo Video
There are non-nikon that look the same as the Nikon. That may be a wrong hood for you.
The Nikon hood for the 18-55 is the HB-45
Nikon doesn't really make the right hood for the older version of this lens (which appears not to have a bayonet mount). Nikon recommends the HB-69 for the new version of this lens, which is a petal hood. The OP should be ok with his once oriented right, but may have to loose the filter behind it.
HB-69 Bayonet Lens Hood from Nikon