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.
Tingling in the pinky finger can be caused by a disorder of the neck spine, anatomical abnormality around the clavicle (cervical rib, anomalous muscles resulting in thoracic outlet syndrome), disorders of the elbow (cubital tunnel syndrome), wrist (Guyon's canal syndrome), hand (hammer hand syndrome) or the pinky finger itself (injury).
One possible cause of numbness in the finger tips is lack of blood flow. This can be caused by something called Raynaud's phenomenon. Raynaud's phenomenon is a symptom that is seen in some disease such as lupus where blood flow doesn't reach the tips of the fingers, especially in cold weather. Another common cause of numbness in the finger tips is uncontrolled diabetes. High blood sugars caused by diabetes damage nerves in the finger tips and toes. If you also have nerve problems in your feet, then this could be an explanation. I suggest that you schedule an appointment with your primary care physician.