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.
Hyperventilation, or rapid breathing, which can cause tingling in the fingers and around the mouth by lowering the level of carbon dioxide in the blood stream. This is usually associated with an anxious or panicky feeling. Vitamin B-12 is essential to normal nerve function, so low levels of this can cause tingling.