SCREW FASTENING COMPONENT MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To position a specified part of one side component at a specified direction of other component when fastening two components by engaging a screw threadedly.SOLUTION: After processing a lower hole of a female screw 11 and a first seating surface 12 to a first member 1, the position of the first seating surface 12 in a female screw axial line direction is measured, and the female screw 11 is processed so that a valley or a thread of the female screw 11 is positioned as apart from the first seating surface 12 by a first specified distance in the female screw axial line direction and positioning in a female screw reference diameter direction. And, after processing a second seating surface 212 to a second member, the position of the second seating surface 212 in a male screw axial line direction is measured, and a male screw 211 is processed so that a thread or a valley of the male screw 211 is positioned as apart from the second seating surface 212 by a second specified distance in the male screw axial line direction and positioning in a male screw reference diameter direction.