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 5990-01-311-7491
NSN 5935-01-386-6367
NSN 6610-01-074-8158
NSN 5960-00-059-9750
NSN 6320-00-036-3688
NSN 5925-00-059-4991
NSN 5905-00-141-3882
NSN 5905-00-526-0753
NSN 5996-01-580-0582
NSN 5910-00-612-8464
NSN 5965-01-605-4703
NSN 6145-00-688-5697