Nut with asymmetric groove means

Brushing – scrubbing – and general cleaning

Patent

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Details

85 32T, 151 21C, F16B 3928

Patent

active

039890821

ABSTRACT:
A free spinning nut is formed with an asymmetric, double size recess in its bearing face. Also, I have discovered flutes in its side faces so as to enhance its holding capacity, particularly when used against softer material.

REFERENCES:
patent: 179577 (1876-07-01), Latham
patent: 1734445 (1929-11-01), Place
patent: 2931410 (1960-04-01), Stoll
patent: 3342236 (1967-09-01), Clark

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