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.
Numbness in your pinky and/or ring finger is related to the nerve in your elbow (tennis elbow). Press firmly on the part of your arm that is in line with the back of your hand, near your elbow. If it makes the numbness change then you know that is the problem and can ask another doctor (an orthopedist) what exercises or therapy you can do at home for it.