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 6620-01-468-9288
NSN 5960-01-245-6088
NSN 5990-01-185-5346
NSN 5905-01-570-8856
NSN 4140-01-112-4966
NSN 6645-01-521-4383
NSN 5930-01-065-2684
NSN 6320-01-462-3555
NSN 6130-00-702-4570
NSN 5960-00-410-3500
NSN 7035-00-124-9383
NSN 5910-01-469-5514