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 5990-01-221-6361
NSN 5925-00-199-5858
NSN 6150-01-381-2521
NSN 5905-01-351-7922
NSN 6685-01-012-2597
NSN 5915-00-193-6850
NSN 5920-01-249-2708
NSN 5965-00-698-0433
NSN 4140-01-458-2743
NSN 5920-01-381-9310
NSN 7035-01-003-9142
NSN 6130-00-494-7332