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 5945-00-619-0765
NSN 6220-01-574-2165
NSN 5998-00-280-5651
NSN 5895-00-910-8431
NSN 5965-00-275-0491
NSN 4140-01-469-1579
NSN 5925-01-459-7882
NSN 5998-01-449-1180
NSN 5920-01-139-5368
NSN 6645-01-437-9017
NSN 6320-00-456-2092
NSN 5915-00-716-1821