No. The coarse thread UNC screws will not thread into the fine thread UNF holes. UNC must be used with UNC and UNF with UNF.
threads per inch
UNC stands for "UNIFIED BOLT THREAD COARSE" UNF stands for " UNIFIED BOLT THREAD FINE"
Unified National Fine as opposed to UNC - Unified National Course
A thread gauge is a tool used for identifying the particular thread on a bolt or screw. The gauge will have several blades with saw like teeth of different sizes. You match a particular gauge to the thread which will then tell you what size thread it is. gauges come in various pitches to match different screw threads. UNF, UNC, Whitworth, Metric etc. Each has a different pitch angle and thread per inch or millimetre.An image of a thread gauge can be seen HERE
Universal Noise of F***ing
UNF refers to UnNormalised Form.
No.
unc is coarse, unf is fine pitch
Waves produced in a thread can be traveling waves, where energy is transferred as the wave moves along the thread, or standing waves, where certain points on the thread appear to vibrate in place due to interference of two waves traveling in opposite directions. The type of wave depends on factors like the properties of the thread and the forces acting on it.
I would use an 18mm or 23/32 drill bit, in general, although it does partly depend on the thread type ( UNF, UNC etc) and the material .
As of July 2014, the market cap for Unifirst Corporation (UNF) is $2,021,434,001.94.