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 5999-01-239-7783
NSN 6620-00-378-3070
NSN 5996-00-683-5176
NSN 6150-01-516-5130
NSN 7035-01-204-7481
NSN 5930-00-177-7228
NSN 5950-00-833-8386
NSN 6150-01-423-8336
NSN 5895-00-179-5210
NSN 6645-01-400-2119
NSN 6110-01-069-4547
NSN 6105-01-003-9162