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 6110-01-418-8671
NSN 6150-01-616-6007
NSN 5960-00-026-3142
NSN 5905-01-560-1793
NSN 5910-01-432-7175
NSN 5935-01-654-2320
NSN 6135-01-462-0731
NSN 5985-01-170-3500
NSN 5855-01-356-5284
NSN 2925-01-346-9522
NSN 5895-00-264-5666
NSN 6320-00-583-3104