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.
Damage to one of these nerves can cause numbness in your pinkie --affecting half of the finger -- on the side where the injury occurred. Digital nerve injuries are typically caused by lacerations or traumatic hand injuries, and surgery is usually required to repair the nerve and restore feeling in your finger.lthough rare, compression of the ulnar nerve in your hand can cause numbness in your pinkie finger. Tumors, cysts, blood vessel disease and arthritis can increase pressure on the ulnar nerve in the Guyon canal. In addition, the ulnar nerve can be damaged with trauma to this area of your hand.