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 6110-01-154-9172
NSN 5935-00-687-2335
NSN 6610-01-423-9219
NSN 5930-01-377-7908
NSN 5985-01-101-3489
NSN 5835-00-368-4182
NSN 6145-01-284-6989
NSN 6320-00-513-8376
NSN 6130-01-048-4109
NSN 5985-00-519-8372
NSN 6220-01-483-1269
NSN 5835-01-593-3239