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 6150-01-605-1730
NSN 5855-01-504-6080
NSN 5835-01-245-8077
NSN 5835-00-286-5432
NSN 5975-00-066-3581
NSN 6145-00-078-9917
NSN 4140-00-456-0902
NSN 5930-00-036-8721
NSN 4140-01-181-3307
NSN 5855-00-361-0167
NSN 5835-01-104-8914
NSN 6320-01-247-0898