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 5835-01-422-2399
NSN 6105-01-543-3650
NSN 6135-00-107-6662
NSN 5998-01-287-8546
NSN 5935-00-205-9443
NSN 5996-01-487-3733
NSN 6135-00-191-6444
NSN 6110-01-610-1214
NSN 5905-01-438-0237
NSN 6135-01-540-2403
NSN 5998-01-156-1525
NSN 5990-01-253-7647