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 5895-01-496-4228
NSN 6220-01-275-8548
NSN 5999-01-250-9571
NSN 5930-01-535-0280
NSN 5990-00-320-2779
NSN 6130-01-198-8838
NSN 6110-01-032-2899
NSN 5965-01-296-8991
NSN 5855-00-610-4052
NSN 5975-01-195-6760
NSN 5855-01-423-1768
NSN 4140-01-607-2170