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 6650-00-486-7924
NSN 6240-01-141-3625
NSN 5975-01-323-1191
NSN 7035-00-902-8995
NSN 5999-01-616-5665
NSN 2925-00-073-9375
NSN 6650-00-952-4500
NSN 5915-01-630-5696
NSN 6240-00-758-6392
NSN 2925-01-127-0167
NSN 6610-00-867-2592
NSN 6135-00-444-1402