Relates to splines produced in holes or on shafts of nominal size from ¿¿ to 6 in., for 4, 6, 10 and 16 splines of narrow depth and 6 and 10 splines of deep depth. Dimensions and gauging data are tabulated for bottom fitting (top clearance) and top fitting (bottom clearance) splines in three classes of fit, covering conditions where minimum backlash is necessary, where ease of assembly is required, and where larger positive allowances are acceptable.