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 5925-00-100-0102
NSN 6610-01-330-1895
NSN 6645-01-443-1103
NSN 5935-01-335-2770
NSN 2925-01-317-4543
NSN 5920-01-315-8080
NSN 5985-00-479-8612
NSN 6150-00-647-3285
NSN 2925-01-345-9439
NSN 5910-00-490-3943
NSN 6320-00-450-7014
NSN 6145-00-891-6779