Self tapping stud

Details Self tapping stud Self tapping stud

1986-04-07

1987-06-16

Wolfe, Robert 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

10141R, 408222, 411418, F16B 2502

Patent

active

046733230

ABSTRACT:
A self-tapping and/or self-carving stud having two or more right angle elongate grooves of alternate length in the tapered thread or projecting helical ribs. The right angled grooves enable tapping debris to accumulate in the grooves to help lock the threads for fastening the stud, particularly in irregular holes. The alternate length of the grooves helps make this stud design unbreakable, thus unbeatable for special situations especially in exhaust manifold applications.

REFERENCES:
patent: 438754 (1890-10-01), Rogers
patent: 2113600 (1938-04-01), Olson
patent: 2156350 (1939-05-01), Olson
patent: 2165011 (1939-07-01), Rosenberg
patent: 2278377 (1942-03-01), Cook
patent: 2278411 (1942-04-01), Braendel
patent: 2871751 (1959-02-01), Lemke
patent: 2956470 (1960-10-01), Knohl
patent: 3056234 (1962-10-01), Nelsson et al.
patent: 3370501 (1968-02-01), Ansingh
patent: 3965793 (1976-06-01), Roser

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