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 6645-01-210-0036
NSN 7035-01-481-2110
NSN 5905-01-211-6643
NSN 6105-00-226-1828
NSN 6105-01-182-0436
NSN 5998-01-342-4247
NSN 5835-01-234-7039
NSN 5965-01-529-0579
NSN 5920-00-294-0753
NSN 5950-01-163-4040
NSN 5998-01-502-8633
NSN 5915-01-435-2549