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.
Cubital Tunnel Syndrome. Numbness and tingling in your hand can be the result of a number of problems. A common cause of tingling and numbness in the ring and small finger is cubital tunnel syndrome. Cubital tunnel syndrome refers to a problem related to compression of the ulnar nerve at the level of the elbow in the cubital tunnel region.