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 6105-01-270-3170
NSN 6145-01-090-8706
NSN 6220-01-045-6265
NSN 6620-01-380-4882
NSN 6645-01-537-1066
NSN 6130-00-900-4758
NSN 5999-01-055-9305
NSN 6650-00-882-3576
NSN 6240-01-020-3440
NSN 5998-00-707-5781
NSN 6110-00-043-4553
NSN 7035-01-491-3981