Method of making extruded panel and nut assembly

Claim 1

In a method of making a plate metal product having a threaded receptacle projecting integrally from one surface of the product, the steps of providing a metal plate having top and bottom surfaces and a nut having a first surface and a second surface on opposite sides thereof and having a pair of bores of different sizes therethrough, one smaller than the other, said bores meeting coaxially with an intervening shoulder and an annular lip adjacent to the first surface and positioned concentric with said bores and extending radially inward with respect to the larger of said bores, positioning said nut with its first surface in engagement with said bottom surface of said metal plate, extruding from said metal plate a depending tubular sleeve having inner and outer concentric surfaces with said outer surface mechanically bonded to said annular lip of said nut and extending into the larger of said bores of said nut and bonded thereto, roll forming an internal thread first in said tubular sleeve and then in the smaller of said bores of said nut to further cold work said tubular sleeve to increase the mechanical bond between the said tubular sleeve and said nut.