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 6150-00-740-0813
NSN 5990-00-121-2134
NSN 5905-01-272-0040
NSN 6110-01-128-3050
NSN 6240-01-224-6941
NSN 5915-00-441-0923
NSN 5950-01-059-2876
NSN 5998-00-932-2043
NSN 6620-01-140-4405
NSN 5950-00-446-9287
NSN 2925-01-329-3665
NSN 5920-00-887-6514