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 6105-01-390-3114
NSN 5855-01-506-2016
NSN 6135-01-475-1040
NSN 6220-00-825-1808
NSN 5855-00-896-4047
NSN 5925-01-420-6924
NSN 5895-00-850-6399
NSN 5930-01-209-8517
NSN 5975-01-261-2995
NSN 6220-00-282-7916
NSN 6150-00-097-1391
NSN 5950-01-322-8557