propel nut abuts bottom surface 106 of the substrate 101 the top of the nut 109 a abuts flange 107 of the propel nut 104 leveler 109 is integral with nut 109 a and bottom surface 109 b rests upon a surface not shown the threaded stud is able to move in an up and down translational direction by rotating the nut 109 a which enables the threaded stud to move relative to propel nut 104 the movement of the threaded stud 103 a with respect to the propel nut is limited by the position of the nut 109 a on the outside of the bore 102 and the position of the end cap 301 in the bore 102 of the substrate 101 end cap 301 is diametrically larger than the threaded stud 103 a end cap 301 has a snug fit within bore 102 and is rotationally movable as the end cap 301 passes along the cylindrical bore 102 when the threaded stud 103 a rotates with respect to the interior threads of the propel nut 104 the height of the substrate and leveling device is adjustable based on the length of the threads 103 of the threaded stud 103 a as shown in fig6 b the leveler is illustrated in a second position fully inserted into and through the propel nut this second position provides the shortest possible leg height adjustment at the lowest height adjustment position of the leveling device the.