Threaded fastener with longitudinal grooves

Details Threaded fastener with longitudinal grooves Threaded fastener with longitudinal grooves

1996-08-30

1998-06-09

Wilson, Neill R.

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

Externally threaded fastener element, e.g., bolt, screw, etc.

Head driving structure

411410, 411919, F16B 2300, F16B 3506

Patent

active

057624577

ABSTRACT:
A threaded fastener having an elongated threaded shaft portion, an enlarged head portion connected in axial alignment to said shaft portion, and a plurality of longitudinal grooves positioned circumferentially around said head portion. The fastener has a longitudinal axis, and the grooves are positioned parallel to this axis. The grooves engage the shaft portion adjacent the head, such that the grooves extend completely from the free end of the head to the point where the shaft is connected to the head. The grooves preferably extend radially toward the longitudinal axis to a depth equal to the outer diameter of the threaded shaft.

REFERENCES:
patent: 1865346 (1932-06-01), Wells
patent: 2451747 (1948-10-01), Kindt
patent: 3236141 (1966-02-01), Smith
patent: 5575602 (1996-11-01), Savage et al.

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