Threaded nut resistant to removal

Details Threaded nut resistant to removal Threaded nut resistant to removal

1986-02-04

1988-07-12

Wilson, Neill

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

Torque responsive nut or bolt driving connection

Frangible connection

411430, 411432, 411910, F16B 3100, F16B 4100

Patent

active

047566523

ABSTRACT:
A security fastener has a threaded body with tool engaging surfaces. It is surrounded by a freely rotatable spinner. When the fastener is tightened down the tool engaging surfaces are removed so there is nothing on the fastener to be engaged by a tool. The side of the fastener is shielded by the rotatable spinner.

REFERENCES:
patent: 1696523 (1928-12-01), Cochran
patent: 2823725 (1958-02-01), Trinca
patent: 3444775 (1969-05-01), Hills
patent: 3561820 (1971-02-01), Chaivre
patent: 3978761 (1976-09-01), Sosinski
patent: 4225165 (1980-09-01), Kesselman
patent: 4302137 (1981-11-01), Hart
patent: 4521146 (1985-06-01), Wharton

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