EARTH BOLT

摘要

An earth bolt is electrically connected to a nut and an earth terminal, by being engaged in the nut to position the earth terminal between the bolt and the nut. The bolt has a head and a body, the body extending from the head and having threads of an external thread formed on the body and screw-fastened to an internal thread of the nut. Among the flank surfaces formed on the thread, a convex portion is formed on a head-facing flank surface, the head-facing flank surface facing the head, along a circumference centering a shaft center of the body in such a manner that the convex portion is protruded from the head-facing flank surface. A top surface parallel to the head-facing flank surface is formed on the convex portion in a position where the convex portion interests with a pitch line of the earth bolt.

主权项

1. An earth bolt for coming into electrical contact with a nut by being engaged in the nut, the earth bolt comprising:
a head; and a body extending from the head, the body having threads of an external thread formed on the body and screw-fastened to an internal thread of the nut, wherein flank surfaces are formed on the thread, a convex portion is formed on a head-facing flank surface, the head-facing flank surface facing the head, along a circumference centering a shaft center of the body in such a manner that the convex portion is protruded from the head-facing flank surface, and a top surface parallel to the head-facing flank surface is formed on the convex portion in a position where the convex portion interacts with a pitch line of the earth bolt.