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 6150-01-516-0146
NSN 5855-01-188-4049
NSN 6650-00-299-9681
NSN 6145-00-730-3933
NSN 5950-00-597-3661
NSN 6105-01-127-0042
NSN 7035-01-296-4737
NSN 5920-01-163-9257
NSN 6650-01-328-0546
NSN 6320-01-209-0952
NSN 5960-01-460-5516
NSN 5975-01-250-4239