A chassis rail stabilizer that may be used to securely support a rack mount rail in a server rack, in particular during transportation of the server rack. The chassis rail stabilizer includes a first body with a front face and a back face, and four rail supporting sides. The stabilizer further includes a second body extending off of the front face of the first body and an offset threaded through hole that extends through the first and second bodies. The offset nature of the through hole is such that the stabilizer may be secured to a vertical mounting post in a server rack in one of four orientations. Each orientation causes one of the rail supporting sides to extend downward a different distance to support a top surface of the rail beneath.