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 6220-01-328-9189
NSN 5895-00-118-7779
NSN 5935-01-495-1317
NSN 5950-00-911-3453
NSN 5950-01-089-6121
NSN 7035-01-461-7742
NSN 6320-01-607-1491
NSN 5960-01-084-0876
NSN 6145-00-657-4755
NSN 6645-01-381-6084
NSN 5895-00-574-0287
NSN 5920-00-167-2700