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 5910-01-432-0576
NSN 6150-01-467-2892
NSN 6110-01-365-5711
NSN 6220-01-386-3082
NSN 6685-01-613-5270
NSN 7035-00-445-9657
NSN 6220-01-204-8916
NSN 5945-01-108-1490
NSN 6105-01-483-5405
NSN 5930-01-641-1248
NSN 6650-01-483-9191
NSN 5985-01-330-1784