Electrical box with laterally open polygonal bore

Details Electrical box with laterally open polygonal bore Electrical box with laterally open polygonal bore

F - Mech Eng,Light,Heat,Weapons

16

B

347/12

F16B 39/00 (2006.01) F16B 37/00 (2006.01) H02G 3/14 (2006.01)

Patent

CA 1282855

ELECTRICAL BOX WITH LATERALLY OPEN POLYGONAL BORE Abstract of the Disclosure An electrical outlet box formed of metallic material has an integral boss that angularly aligns, engages and retains wiring device mounting screws. The boss has a bore for receiving the screw comprising in sequence a cylindrical surface having a diameter slightly larger than the crest diameter of the mounting screw threads, and a self-tapping surface defining generally a regular hexagon in transverse cross section. The hexagon has a diameter across its corners slightly larger than the crest diameter of the screw threads, and a diameter across its flat sides slightly larger than the root diameter of the screw threads and slightly smaller than the crest diameter of the screw threads. A slot extends laterally from the bore and into the boss.

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