NUT AND LIQUID SUPPLY DEVICE WITH IT

摘要

PROBLEM TO BE SOLVED: To provide a nut easy to fasten even by manual labor, allowing tool fastening similarly to a conventional hexagonal nut. SOLUTION: A shape of this nut in a cross section perpendicular to a central axis has six apexes 164 disposed at nearly 60 deg. intervals through recessed parts 165, and the six apexes 164 are respectively radially projected.