There are so many different types of nails out there, but when installing your treads and risers you will want to go with the Finish Nails. Using a 16 or 18 gauge finish nail will sure get the job done and the nail hole will barely be noticeable! 
Below is the drawing of the nails and the specs!
Comments
Cool post... which nail is which?
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See our revised post with the specs included on each nail drawing!