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 5960-01-522-0391
NSN 6240-01-645-6782
NSN 5999-01-392-9563
NSN 5998-00-463-5237
NSN 5960-01-487-6436
NSN 5960-01-281-2872
NSN 5998-01-348-5332
NSN 6220-00-887-2637
NSN 6685-01-499-1995
NSN 5895-01-391-5682
NSN 5975-01-629-2033
NSN 5950-01-384-3834