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.
go to a doctor. Tingling fingers and pain in the left arm are most probably due to a herniated disc in the cervical region. I have herniated disc between C5 through C7 and experience tremendous hand tingling as well as numbness in my left arm with pain. I also have heart disease and this discomfort is totally different.