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 7035-01-576-8995
NSN 5945-01-417-5986
NSN 6105-01-397-8711
NSN 5975-01-098-9735
NSN 5930-01-046-1770
NSN 6685-01-361-5195
NSN 5999-01-353-2989
NSN 5925-01-241-1541
NSN 4140-01-012-3996
NSN 5855-01-068-3683
NSN 5930-00-504-7848
NSN 5920-01-005-0161