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 5960-00-204-7506
NSN 5999-01-465-7592
NSN 6220-00-179-2653
NSN 5855-01-051-1155
NSN 6645-01-301-3066
NSN 5855-01-388-6837
NSN 5998-01-123-5289
NSN 5835-00-529-6307
NSN 6320-01-544-6447
NSN 5975-00-188-7764
NSN 6220-00-496-8592
NSN 5910-01-451-4905