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 6685-00-118-0594
NSN 6240-01-565-6276
NSN 4140-01-353-2205
NSN 5935-01-416-7352
NSN 5998-01-105-2966
NSN 5990-00-149-8181
NSN 5985-00-324-7526
NSN 6685-01-170-8248
NSN 6685-01-476-6989
NSN 6150-01-452-9626
NSN 4140-00-248-6089
NSN 6110-01-173-8077