Anti-cross threading screw

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Pilot end having means enhancing fastening or installation

Patent

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Details

411417, 411426, F16B 3500

Patent

active

047892889

ABSTRACT:
A screw having a tapered and offset tip with a partial thread prevents cross-threading of the screw when inserted into a nut. The offset tip is a section of a conical frustum. The axis of the conical frustum section is offset from the axis of the shank of the screw. The conical frustum section is defined by those portions of a conical frustum contained within the outer radius of the screw shank. The partial thread is located on the side of the tip facing the direction of offset of the tip.

REFERENCES:
patent: 126366 (1872-04-01), Wills
patent: 3438299 (1969-04-01), Gutshall
patent: 3724315 (1973-04-01), Sygnator
patent: 4486135 (1984-12-01), Kazino
patent: 4534690 (1985-08-01), Barth
patent: 4630985 (1986-12-01), Simons

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