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 5905-00-804-1905
NSN 5975-01-527-1086
NSN 6220-01-441-8662
NSN 5905-01-085-6362
NSN 6620-01-481-1358
NSN 5960-01-632-6576
NSN 5895-01-485-9821
NSN 5905-01-339-7765
NSN 5960-01-584-9452
NSN 5945-00-252-1055
NSN 4140-00-606-9453
NSN 5920-01-555-3597