Profile board able to remarkable increase measurement speed of API Edison thread taper

Provided is a profile board capable of obviously improving the tapering measuring speed of API round thread, comprising a handle 1, a plate gauge body 2, and screw threads 3, wherein the handle 1 and the plate gauge body 2 are in combination. In the position of the effective length L, two edges of the utility model are respectively designed with screw threads 3 along circumferential direction, and the screw threads 3 are divided into two forms including an inner screw and an outer screw. The utility model has the advantage of convenient and reliable utilization. In measuring time, the only thing needed is to place the profile board on the surfaces of screw connectors, and then the inspectors can directly find the position with the distance of 1 inch without counting screws, thereby saving the time of counting screws and increasing the measuring speed.