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 5945-01-521-2216
NSN 5960-01-017-0989
NSN 5950-01-269-1829
NSN 2925-01-323-9835
NSN 7035-00-623-4744
NSN 7035-01-128-7431
NSN 6685-01-086-4715
NSN 5975-01-448-2098
NSN 5960-00-306-4177
NSN 6645-01-435-8356
NSN 6130-01-056-5251
NSN 6130-00-695-9046