Anti-cross threading fastener

Details Anti-cross threading fastener Anti-cross threading fastener

1988-08-22

1990-04-10

Smith, Gary L.

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

411386, F16B 3500

Patent

active

049155601

ABSTRACT:
A threaded fastener for preventing cross threading comprises a head, a cylindrical threaded shank projecting from the head, and a tip section formed on the end of the shank opposite the head. The tip section has a generally circular cross-section and has at least one and preferably two partial threads formed on it. The tip section may be generally cylindrical, conical, frusto-conical or bullet shaped. A method of manufacturing an anti cross thread fastener comprises forming a fastener blank with a shank portion joined to a tip section having a tip threading side and a reduced radius side, and applying threads thereto.

REFERENCES:
patent: 126366 (1972-04-01), Wills
patent: 2167910 (1939-08-01), Rottenburg
patent: 2251495 (1941-08-01), Owen
patent: 3438299 (1969-04-01), Gutshall
patent: 3724315 (1973-04-01), Sygnator
patent: 3835495 (1974-09-01), Synator
patent: 3863526 (1975-02-01), Sygnator
patent: 3978760 (1976-09-01), Muenchinger
patent: 4069730 (1978-01-01), Gutshall
patent: 4179976 (1979-12-01), Sygnator
patent: 4486135 (1984-12-01), Kazino
patent: 4534690 (1983-10-01), Barth
patent: 4630985 (1986-12-01), Simons
patent: 4789288 (1988-12-01), Peterson

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