The effects of different inner threaded nut parameters on maximum withdrawal resistance (MWR) in radial direction of Catalpa ovata don components under transverse-grain holding test condition were carried out by orthogonal test method. The results show that the threads length, threads interval and threads height had significant effects on MWR while the small diameter of screw had little influence on it. With increment of thread length and height and decrement of thread interval, MWR went upward correspondingly. If the MWR of this type of connec...
