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 6620-00-901-7848
NSN 5998-00-484-8211
NSN 5975-01-350-3425
NSN 5935-01-213-2857
NSN 5915-01-018-8112
NSN 5985-00-732-9071
NSN 5965-00-539-7778
NSN 7035-00-679-9027
NSN 5935-01-328-1758
NSN 5998-00-193-8380
NSN 5945-01-530-1867
NSN 6320-01-036-2598