James Donald Threatt, 46, Big Rock, died Sunday, June 8, 1986, at his home after a brief illness.  The funeral will be at 10 a.m. today at Anglin Memorial Chapel, Dover, with the Rev. Morris Lee officiating.  Burial will be in the Wyatt Chapel Cemetery.  Threatt was born in Stewart County on June 6, 1940, son of Lester and Ida Lee Shelby Threatt, Big Rock.  He was employed at Acme Boot Co., Inc., Clarksville.  Survivors, in addition to his parents, include a son, James L. Threatt, Dover; two brothers, Stanley and Dale Threatt, both of Big Rock; and a sister, Carolyn Blosmore, Big Rock.  Pallbearers will be Jackie Threatt, Randolph Rittenberry, Paul Shelby, William Shelby, Russell Carte and Randy Carte.