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 5925-01-066-3758
NSN 6145-01-278-8563
NSN 5915-01-244-3616
NSN 5998-01-094-7241
NSN 5975-01-231-9549
NSN 5920-00-732-6763
NSN 7035-00-631-3782
NSN 6685-01-117-0892
NSN 5975-00-933-5920
NSN 6620-00-932-1207
NSN 6650-01-369-6536
NSN 5985-00-064-3958