Abstract: A drill bit for drilling holes in a work surface including a hard wear-resistant insert and a metal body including a top working surface of an irregular surface configuration having a slot for retaining the hard wear-resistant insert. The body having a metal grain structure substantially parallel with the contour of the body. In a preferred embodiment the body is formed by cold-heading.

Abstract: A sucker rod assembly is disclosed for use in oil well pumping apparatus. The assembly is constructed of a rod and a steel rod-end fitting. A unitary threaded head at the end of the rod is screwed into a socket in the rod-end fitting. The threaded head is of enlarged diameter and a tapered shoulder is provided at the juncture of the rod in the head. The fitting has a cylindrical socket with a threaded portion at the bottom and an unthreaded flange adjacent the outer end. After the head is screwed into the socket the flange is extruded into surface engagement with the tapered shoulder to provide a mechanical interlock between the rod and the fitting.

Abstract: A sucker rod assembly is disclosed for use in oil well pumping apparatus. The assembly comprises a rod with roll-formed threads on the end thereof and a rod-end fitting with a threaded socket for receiving the threaded rod. An unthreaded portion on the outer end of the socket is extruded into surface engagement with the unthreaded surface of the rod to seal and mechanically interlock the rod and fitting.