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 5990-01-372-1642
NSN 5895-00-441-1870
NSN 6620-00-025-1889
NSN 6320-01-393-7022
NSN 5930-01-481-3569
NSN 2925-01-446-6523
NSN 5935-00-276-9413
NSN 6320-01-292-6635
NSN 5945-00-931-0811
NSN 4140-01-237-3390
NSN 6620-01-382-2445
NSN 5915-00-855-7771