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 6645-00-641-3202
NSN 5855-01-440-9880
NSN 6645-01-051-7447
NSN 6105-01-561-0330
NSN 5855-01-436-7621
NSN 5996-01-212-3066
NSN 6220-01-622-4581
NSN 5945-01-534-7910
NSN 6645-00-580-9605
NSN 5960-01-364-1318
NSN 5930-00-840-8125
NSN 6145-01-358-0379