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 5835-00-572-7445
NSN 5950-01-128-2127
NSN 5920-01-138-3572
NSN 5998-01-157-9353
NSN 5910-01-633-9963
NSN 5999-00-498-4837
NSN 6145-00-158-8704
NSN 5920-01-608-5278
NSN 5925-01-478-2040
NSN 6320-00-098-2858
NSN 5915-00-491-7309
NSN 5965-01-564-4066