examples of nails
finishing nail 
The head, scarcely wider than the shank, can easily be hammered in and concealed; it is ideal for finishing work and moldings.
masonry nail 
Made of hardened steel, it can be hammered into masonry without breaking or bending.
cut nail 
The flat shank and head do not harm fibers; it is used especially for laying wood flooring.
common nail 
Sturdy wide-headed nail, used for general woodwork and carpentry.
spiral nail 
Turns like a screw as it is hammered in; it reduces cracking and is hard to pull out.
tack 
Small wide-headed nail often used to affix carpets, fabric and other thin materials.