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 6145-01-371-2916
NSN 5960-01-513-3230
NSN 5975-01-268-7093
NSN 6645-01-155-9449
NSN 5999-01-369-0795
NSN 6105-01-445-4574
NSN 7035-01-220-6392
NSN 5925-01-140-2773
NSN 5905-01-429-5929
NSN 5996-01-604-9653
NSN 6150-01-534-1105
NSN 6685-01-003-9343