A method for slidably mounting a slide assembly to a computer server unit rack. Front and rear brackets of the slide assembly include a plurality of dual-diameter mounting pins and a pair of spring elements having different lengths. The mounting pins are positioned within holes in the rack columns and one of the spring elements snaps behind the rack column to hold the slide assembly to the rack. If the holes in the rack columns have one diameter, then the mounting pins extend partially through the holes, and the shorter spring element snaps behind the rack column. For a larger diameter or square rack column hole, the mounting pins extend completely through the holes where the longer spring element snaps behind the rack column.