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 4140-00-152-7092
NSN 7035-01-307-2560
NSN 5935-01-249-0783
NSN 6650-01-359-5385
NSN 5835-01-572-1284
NSN 5960-00-557-6951
NSN 5930-01-538-3888
NSN 6240-00-017-9006
NSN 5996-01-268-1625
NSN 5996-01-190-9982
NSN 6685-01-312-7483
NSN 6145-01-041-3057