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 6240-01-262-9590
NSN 2925-00-706-5902
NSN 2925-01-426-3410
NSN 6105-01-207-2729
NSN 5910-01-132-5772
NSN 5990-01-433-7886
NSN 5920-00-655-1154
NSN 5985-01-584-3770
NSN 6685-01-242-1030
NSN 5895-00-981-0732
NSN 5960-01-343-5912
NSN 6130-01-119-2723