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 6320-01-160-3730
NSN 4140-00-783-4228
NSN 5999-01-116-2198
NSN 6220-00-115-5842
NSN 5975-01-028-7853
NSN 5910-01-302-4054
NSN 5895-01-448-6120
NSN 5996-01-440-7489
NSN 6135-00-812-9039
NSN 5965-01-059-4028
NSN 6650-01-044-5431
NSN 5996-01-224-7914