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 7035-00-185-8683
NSN 6685-00-922-3918
NSN 6130-00-753-0293
NSN 5920-00-981-5821
NSN 6135-01-215-1245
NSN 5950-00-771-9441
NSN 5996-01-518-9868
NSN 6105-01-459-7902
NSN 6130-00-356-1702
NSN 2925-01-432-8452
NSN 5920-01-608-8543
NSN 5910-01-651-1894