Patent ID: 6220805
Filing Date: 2001-04-24
Classification: B21K,F16B

Abstract:
A headless screw having an axis with an axial length and a plurality of threads formed along the axial length, said screw having opposite headless end portions, one of said headless end portions being a driving end formed with a slot to receive a wedge shaped end portion of a screwdriver for driving rotation of the screw, the other headless end portion being without a slot such that rotation of said driving end portion directs the other headless end portion without a slot into and out of a complementary shaped threaded opening, and wherein said slot is formed by a forging operation prior to formation of said threads, and said slot has opposite end sections extending laterally away from the axis of said screw and a middle section between the opposite end sections, the middle section of said slot being of uniform width and the opposite end sections of said slot being wider than the middle section.