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.
Often referred to as the funny bone, this nerve is not well padded and is easily compressed when your arms are on an armrest or desk. Cubital tunnel syndrome causes numbness, tingling and pain along the pinky-side of the ring finger and the hand, as well as the pinky finger. It is easily distinguished from carpal tunnel syndrome because it affects different fingers.