Screw for easily engaging the internal thread of a tapped hole

Details Screw for easily engaging the internal thread of a tapped hole Screw for easily engaging the internal thread of a tapped hole

1988-04-25

1989-04-18

Wilson, Neill R.

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

Having structure to restrict rotation of threaded, mating...

Comprising a thread lock

411385, 411954, F16B 39284

Patent

active

048222259

ABSTRACT:
The screwed shank (2) of a screw (1) is divided into two halves (4, 5) by a slot (3) running centrally in longitudinal direction and two chamfers (7) running vertically to the slot (3) are provided on both long sides of the screwed shank (2). The screwed shank (2) can be inserted into the tapped hole without being obstructed by the thread parts on the two long sides of the slot (3) and the two halves of the screwed shank (2) move at first to the middle of the shank and then engage their external thread with the internal thread of the tapped hole.

REFERENCES:
patent: 278230 (1883-05-01), Fairlamb
patent: 590912 (1897-09-01), Scarritt
patent: 2266758 (1941-12-01), Holtz
patent: 3202194 (1965-08-01), Jones

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