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 5960-01-076-9930
NSN 6150-01-321-3349
NSN 5990-01-416-6009
NSN 5975-01-209-3790
NSN 5996-01-182-1125
NSN 6610-01-141-7014
NSN 2925-01-560-4123
NSN 6130-00-776-6081
NSN 5945-00-003-7809
NSN 6145-00-923-8127
NSN 7035-01-169-6551
NSN 6240-00-889-6753