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 5998-01-552-7006
NSN 5998-01-579-3405
NSN 6685-00-451-6941
NSN 5920-00-493-8307
NSN 6220-01-108-1113
NSN 4140-01-133-4562
NSN 5910-01-459-6928
NSN 5975-00-193-8925
NSN 6150-01-050-7528
NSN 5998-01-517-5855
NSN 5915-00-430-2582
NSN 6135-01-445-6589