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 6320-00-343-1798
NSN 5960-01-507-9112
NSN 5895-00-244-6750
NSN 5996-01-079-3651
NSN 5985-01-325-4457
NSN 6645-01-430-7124
NSN 5920-01-278-9952
NSN 7035-01-467-9030
NSN 6645-01-609-7365
NSN 5905-01-551-0441
NSN 5915-00-050-1307
NSN 5999-01-241-5976