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 5910-00-959-5209
NSN 6620-01-380-4882
NSN 6320-01-407-8663
NSN 5999-00-905-1980
NSN 4140-01-362-7174
NSN 5855-00-058-1293
NSN 6645-01-129-6753
NSN 6650-01-514-0240
NSN 5945-01-104-0898
NSN 5915-00-440-7272
NSN 6150-01-416-6926
NSN 6105-01-426-1337