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 6685-00-269-6444
NSN 5965-00-338-6955
NSN 6150-00-448-2357
NSN 5905-01-139-4377
NSN 5895-01-348-0598
NSN 6620-01-386-5914
NSN 6110-00-887-1923
NSN 2925-01-387-0870
NSN 5996-00-405-4509
NSN 6145-01-621-2952
NSN 7035-00-535-8109
NSN 6220-00-424-1504