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 6320-00-174-1362
NSN 5965-01-421-1244
NSN 5855-01-464-3152
NSN 5965-01-510-3456
NSN 5945-01-560-8674
NSN 6645-01-375-5488
NSN 5910-01-541-5490
NSN 5965-01-278-8218
NSN 5985-00-082-3989
NSN 6145-01-424-3364
NSN 5935-00-100-1147
NSN 5965-00-927-4074