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 6145-01-537-2748
NSN 5950-01-328-8215
NSN 6240-01-376-3697
NSN 5998-00-913-7282
NSN 6105-01-470-9956
NSN 5960-01-210-0879
NSN 6130-00-969-5804
NSN 2925-00-408-9829
NSN 5920-00-828-7904
NSN 6645-01-350-3138
NSN 5895-01-163-4231
NSN 6220-01-156-4564