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 5895-00-363-9370
NSN 6135-01-166-5042
NSN 6240-01-567-2376
NSN 5855-01-154-3871
NSN 6320-01-547-2743
NSN 5985-00-216-7057
NSN 5985-01-461-8575
NSN 4140-01-516-0129
NSN 6150-00-369-0376
NSN 5950-01-334-1987
NSN 6620-01-078-6372
NSN 7035-00-470-4977