This International Standard tabulates IS0 inch screw threads (except for pipe threads) having the basic profile for triangular screw threads specified in IS0 68, /SO general purpose screw threads - Basic profile. It comprises both a general plan of the IS0 inch screw threads and the IS0 inch screw threads for screws, bolts and nuts, the latter being a selection from the former. It contains sizes in the diameter range 0.06 to 6 in, comprising a number of series of diameter/pitch combinations, together with a system of thread designations. It remains for each industry to choose for itself, by means of selection among the screw threads of this International Standard, the diameter/pitch combinations appropriate to its own needs.