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 6320-01-382-9676
NSN 5996-00-730-3971
NSN 5990-01-100-7231
NSN 6240-00-589-4515
NSN 6320-01-429-9871
NSN 5910-01-472-6766
NSN 6650-01-599-5668
NSN 7035-00-205-1932
NSN 6110-00-257-1446
NSN 6105-01-285-5690
NSN 6220-00-564-5120
NSN 5905-01-143-7438