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.
Stroke: Brain damage caused by a mini stroke or stroke can also cause finger numbness. Such numbness is often felt on one side of the body, especially in the arms, hands, and fingers. Apart from numbness, a stroke can cause symptoms, like dizziness, sudden headache, vision problems, difficulty in walking, weakness, etc. Nerve Tumor: Tumors on the nerves in the neck, arms or wrists may also cause numbness and tingling sensation in the fingers.