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 5835-01-278-4683
NSN 5975-01-258-5807
NSN 5990-01-168-6797
NSN 6645-00-466-0685
NSN 6240-01-285-4417
NSN 6610-00-248-1559
NSN 5925-01-451-5700
NSN 6610-00-881-5060
NSN 6610-01-439-2651
NSN 5996-01-072-1028
NSN 6645-00-754-4108
NSN 5998-01-015-4179