Abstract: The present invention relates to an improvement in the construction of a snatch block hook bolt assembly which supports the trunnion or becket to which a hook may be attached. A snatch block having a first fixed side plate having a first aperture and a second side swinging side plate having a second aperture and a sheave rotatably held between the first fixed side plate and the second swinging side plate, comprising a spool with a passage there through and an alignment means for positioning said spool concentrically with said first aperture of said first fixed side plate; a threaded nut with an alignment means for positioning said nut concentrically with said second aperture of said second side swinging side plate; and a threaded bolt having a length extendable through said first aperture in said first fixed side plate, through said spool passage, and threadably communicating with said threaded nut.