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 5895-00-424-6296
NSN 6610-01-462-9439
NSN 7035-01-265-0216
NSN 6150-00-661-0184
NSN 6620-01-342-0470
NSN 6220-00-411-3544
NSN 6645-00-119-6221
NSN 5998-01-613-9814
NSN 6130-01-563-0031
NSN 5960-01-073-6043
NSN 5910-01-380-0086
NSN 5960-01-469-7484