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 5985-01-080-0550
NSN 5990-01-605-4769
NSN 6130-00-841-8917
NSN 5960-01-506-7039
NSN 5999-01-487-8343
NSN 6240-00-960-8458
NSN 6105-01-237-2507
NSN 6320-01-243-2276
NSN 5998-01-447-2952
NSN 6145-01-208-3678
NSN 5895-01-040-8524
NSN 6240-00-989-4398