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 6645-01-368-7109
NSN 6645-00-881-9978
NSN 5895-01-431-1427
NSN 6650-01-017-0980
NSN 5935-01-545-1003
NSN 6320-01-441-2438
NSN 6320-00-070-4544
NSN 6135-00-635-9187
NSN 5905-00-081-2355
NSN 2925-00-707-6770
NSN 6145-00-625-0714
NSN 2925-01-067-4446