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 5999-00-469-6061
NSN 6685-01-196-2151
NSN 6240-01-586-9243
NSN 6610-01-160-8815
NSN 5990-01-378-7349
NSN 6220-01-067-8142
NSN 5905-00-761-5727
NSN 5996-01-016-2724
NSN 5990-01-250-4198
NSN 6105-01-268-3409
NSN 6145-01-069-5286
NSN 5996-01-422-7365