UNF (Unified Fine Thread) Unified Fine (UNF) and Unified Coarse (UNC). American threads consist of two common and easily obtained thread patterns known as U. N.F and U.N.C. U.N.F [national fine] is exactly the same as the old S.A.E [standard american engineers] that existed before threads were unified.
Numbness in pinky finger may also be caused by damage to the nerve on the injured side of the finger. There are small nerves, which measure only about two to three millimeters in diameter, in the finger that run along each side. Damage to the finger's nerves may occur due to cuts or a serious hand injury.
The digit(s) then turn blue because of prolonged lack of oxygen. Finally, the blood vessels reopen, causing a local flushing phenomenon, which turns the digit(s) red. 1  Vibration white finger of VWF is a form of Reynaud's disease can cause the finger tips to become numb and turn white especially in the cold.