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 6320-01-228-2380
NSN 6645-01-400-2119
NSN 2925-00-243-6841
NSN 6685-01-426-8929
NSN 6150-01-485-2322
NSN 5925-01-153-0144
NSN 5950-01-264-6978
NSN 5910-00-789-6491
NSN 5930-01-553-4266
NSN 5930-01-411-4980
NSN 5996-01-025-8571
NSN 6610-01-627-0642