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 6240-00-968-9274
NSN 5950-01-634-0677
NSN 5965-01-605-8821
NSN 5975-00-064-5565
NSN 5835-01-034-1255
NSN 5930-01-443-3096
NSN 6105-01-097-3166
NSN 5998-01-500-2114
NSN 6145-01-502-5489
NSN 7035-00-978-7837
NSN 5990-00-827-0684
NSN 5965-01-361-9760