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 6240-00-603-6662
NSN 7035-00-834-2090
NSN 6135-01-502-8771
NSN 6220-01-470-0023
NSN 6135-00-777-5562
NSN 6610-00-716-5248
NSN 5999-01-131-3852
NSN 5945-01-008-8333
NSN 6685-01-110-8353
NSN 5998-01-555-8124
NSN 6130-01-509-3637
NSN 6105-01-339-1220