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 5855-01-266-1645
NSN 5855-01-133-3587
NSN 6130-01-267-0652
NSN 6105-00-951-4520
NSN 5895-01-100-3472
NSN 5996-00-141-3945
NSN 6645-00-879-3867
NSN 5985-00-665-3998
NSN 5965-00-822-8549
NSN 6685-01-429-4735
NSN 5990-01-092-1963
NSN 5965-01-005-0341