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 5925-01-347-4315
NSN 6110-01-155-7004
NSN 6110-01-130-2975
NSN 6620-01-568-3960
NSN 5965-01-265-6814
NSN 5920-00-895-3270
NSN 5920-01-113-9040
NSN 5915-01-396-4609
NSN 5920-01-044-5621
NSN 6320-01-227-2648
NSN 6610-01-193-8861
NSN 6645-01-330-4251