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 6320-00-116-3658
NSN 5835-00-155-1379
NSN 7035-00-392-5417
NSN 5905-01-282-2458
NSN 5996-00-431-9895
NSN 5985-00-628-4647
NSN 5985-01-377-0145
NSN 6130-00-967-0475
NSN 5855-01-596-9264
NSN 5895-01-142-3440
NSN 5905-00-456-9668
NSN 5998-00-336-2396