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 5835-00-660-4523
NSN 5985-01-381-2544
NSN 5965-01-016-9933
NSN 5945-01-427-3790
NSN 6145-00-481-0325
NSN 6685-01-647-3756
NSN 7035-00-679-9027
NSN 5950-00-901-5859
NSN 6220-01-551-1681
NSN 5895-00-222-8555
NSN 6105-01-420-6541
NSN 5915-01-286-2095