Fastener having an axially and radially undulating flange

Details Fastener having an axially and radially undulating flange Fastener having an axially and radially undulating flange

1983-06-08

1984-12-25

Holko, Thomas J.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Threaded fastener locked to a discreet structure

Nut, and means to engage substructure on its opposite faces...

411188, 411332, 411545, F16B 3102

Patent

active

044900821

ABSTRACT:
A screw adapted for use with thin sheet metal. The screw has a threaded shank and a head with an integral flange. The flange has both radial and axial undulations which increase the amount of torque required to strip the screw. The undulations are formed at the outer edge of the flange and on the under surface of the flange and are adapted to engage a workpiece upon threaded advancement of the screw.

REFERENCES:
patent: 388000 (1888-08-01), Rider
patent: 1825419 (1931-09-01), Plym
patent: 2135637 (1938-11-01), Gade
patent: 2289066 (1942-07-01), Olson
patent: 2959204 (1960-11-01), Rigot
patent: 3295580 (1967-01-01), Waltermire
patent: 3661046 (1972-05-01), Waud et al.
patent: 3812639 (1974-05-01), Sygnator
patent: 4223711 (1980-09-01), Tabor
patent: 4293256 (1981-10-01), Pamer

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