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 5950-00-624-4935
NSN 5835-01-475-5714
NSN 6685-01-535-9332
NSN 2925-01-353-3928
NSN 5910-01-507-2360
NSN 5999-01-590-2257
NSN 6130-01-517-1815
NSN 6610-00-722-7472
NSN 6645-00-115-5160
NSN 5925-01-278-2857
NSN 4140-01-169-9592
NSN 6610-01-406-6696