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 5905-01-558-6705
NSN 5910-01-285-1072
NSN 5915-01-093-0007
NSN 5990-01-004-6343
NSN 5975-01-211-6594
NSN 5998-01-057-2786
NSN 5910-01-076-4454
NSN 6135-01-592-4139
NSN 6150-01-521-5167
NSN 5985-00-763-6169
NSN 6240-00-225-1627
NSN 4140-01-502-0553