Inventors:
Ollney B. Terrell - Jamestown NC
Larry J. Arnold - Statesville NC
Assignee:
Farley Metals, Inc. - Chicago IL
International Classification:
F16B 39282
Abstract:
This disclosure concerns a light gauge self-tapping sheet metal screw having a threaded shank and cap-type head, which head has a tool-engaging surface. Between the cupped recess of the head and the shank are a plurality of pyramidal ribs that extend partway around the shank for deforming the edge of the holes in the sheet metal up against the recessed surface of the cup of the head to increase the stripping and backout torque of the screw.