Nut size (A.K.A. diameter) is the size bolt that the nut is used with. The same is true of the thread count. Thus a 1/4"-20 nut fits a 1/4"-20 bolt.
Click on a product # for additional info
Add All Entered
10-32 is a fine thread, but it is listed under coarse thread because it is very common.
A standard six sided nut.
For adding a machine thread to material that otherwise cannot be tapped.