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 5925-00-159-1544
NSN 5960-01-212-4227
NSN 6320-01-322-8340
NSN 5920-01-217-4025
NSN 7035-01-041-2754
NSN 6610-00-933-1380
NSN 5935-01-194-7398
NSN 6110-01-067-3741
NSN 5990-01-176-2724
NSN 5996-00-262-5094
NSN 6150-00-528-4175
NSN 5910-01-411-3545