This is a possiable match to your Nils August, I found this emigration record on the Emibas CD which covers about 75% of the people who left their parish to emigrate to a foriegn country.
Here is that record:
Post 323106
Nilsson, Nils August
Dräng (unmarried man)
b. 6/15/1863 in Döderhult, Kalmar län (Småland)
Emigrated 11/28/1890
from Kroxtorp, Misterhult, Kalmar län (Småland)
to Nordamerika
Source: Household Examination Roll, p. 327
Emibas migration file ID: Misterhult H 1890 092
I have searched the church records on Genline and found this man's family, the names seem to fit so I've made a screen print of the CLERICAL SURVEY (HOUSEHOLD EXAMINATION) HFL 1882-1887 AI:13A Misterhult, Kalmar.
Here is that screen print:
Hope this will be of some help!
Have a nice day!
Don