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 5975-00-149-7647
NSN 5945-01-474-2813
NSN 5999-00-484-4800
NSN 6110-01-246-7177
NSN 6650-01-484-7095
NSN 5855-01-508-6916
NSN 6320-00-905-0543
NSN 6610-01-033-1748
NSN 5999-00-890-3044
NSN 6105-01-394-5305
NSN 5950-01-492-9908
NSN 6645-01-505-5772