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 5915-01-607-4773
NSN 5835-00-958-6231
NSN 6620-01-222-2063
NSN 6130-01-338-3707
NSN 5965-00-255-3889
NSN 5950-01-020-5999
NSN 5905-01-554-8688
NSN 6685-00-761-2534
NSN 6110-01-443-3395
NSN 5950-00-856-4120
NSN 6620-01-044-3371
NSN 5925-01-359-3869