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 7035-00-631-3782
NSN 5915-00-340-9803
NSN 7035-01-145-5059
NSN 5905-01-208-6429
NSN 6685-01-118-0689
NSN 7035-01-361-8821
NSN 6650-01-513-2644
NSN 5996-01-594-3091
NSN 6650-01-520-6130
NSN 5895-00-735-6444
NSN 5915-00-145-6181
NSN 6105-01-339-7053