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 5990-01-380-0650
NSN 5998-00-517-9170
NSN 5999-01-013-9236
NSN 6320-00-405-2348
NSN 6220-01-610-6565
NSN 5996-01-141-8821
NSN 6220-01-548-3692
NSN 6150-01-128-9078
NSN 5990-00-081-3937
NSN 5905-01-576-2338
NSN 6110-01-364-9779
NSN 5855-01-088-8700