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 5945-00-553-9963
NSN 5960-01-025-2526
NSN 6620-00-193-9503
NSN 5998-01-085-9603
NSN 6685-01-423-8076
NSN 5960-00-021-5618
NSN 5905-00-528-4058
NSN 5950-01-565-4682
NSN 6150-00-201-9583
NSN 6105-01-067-3690
NSN 6610-01-129-7097
NSN 6135-01-623-9063