A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 6105-01-190-0200
NSN 6320-01-215-0456
NSN 2925-01-327-3069
NSN 4140-01-281-3456
NSN 5999-01-414-9823
NSN 6620-01-314-3635
NSN 6610-01-224-7247
NSN 5910-01-345-4157
NSN 5855-00-944-0949
NSN 6135-00-900-2139
NSN 5855-00-288-1408
NSN 5985-00-401-7230