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 6610-00-905-6780
NSN 5930-00-251-1467
NSN 6145-00-158-8704
NSN 6150-00-008-9794
NSN 5996-01-468-6417
NSN 5990-00-857-4407
NSN 5965-01-592-8748
NSN 6110-00-248-7475
NSN 6645-01-463-2083
NSN 5990-01-014-9383
NSN 5985-01-436-4163
NSN 6610-00-614-7943