Abstract: A tilt steering column mechanism having two brackets, one of which is connected to a cab frame member and the other of which is connected to a steering column and is slideable within the first bracket upon tilting or pivoting of the steering column about a point remote from the second bracket. The first bracket carries a slideable lock bolt, which is spring-biased on opposite ends in opposite axial directions by a plurality of springs of differing magnitude, and has a raised frusto-conical portion thereon which cooperates with any one of a number of uniformly spaced frusto-conical receptacles provided in the second bracket. A handle, fixedly mounted to one end of the lock bolt causes the sliding of the lock bolt through the intermediary of a rotary cam and pin follower, which pin follower, in the raised cam land position, against the bias of the springs, holds the frusto-conical portion in the selected frusto-conical receptacle.