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 5996-01-237-1615
NSN 5999-01-381-1139
NSN 5990-00-277-3763
NSN 5999-01-447-7855
NSN 5965-01-422-3232
NSN 5855-01-385-8846
NSN 6130-00-790-4771
NSN 5915-01-196-8532
NSN 5965-01-268-7322
NSN 5998-00-477-7928
NSN 6645-00-994-6664
NSN 6620-00-185-1671