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 5855-00-337-3679
NSN 6320-01-478-9351
NSN 5965-01-258-5662
NSN 5855-00-466-2309
NSN 5945-01-205-0000
NSN 6685-01-438-5113
NSN 6130-01-163-2886
NSN 6130-00-419-3642
NSN 5835-00-929-6623
NSN 6150-00-054-3518
NSN 6610-00-652-8543
NSN 5960-00-014-3445