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 5960-01-122-2686
NSN 5996-00-401-8063
NSN 5990-01-287-1682
NSN 5975-00-468-3978
NSN 6645-00-810-7229
NSN 5930-01-617-8408
NSN 7035-00-312-3055
NSN 7035-00-803-3056
NSN 6110-01-534-9885
NSN 6645-00-960-6594
NSN 5835-01-068-6679
NSN 6220-00-998-2169