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 6240-01-005-3456
NSN 6110-00-196-8813
NSN 5855-01-144-4837
NSN 6150-01-188-7317
NSN 6685-01-623-3678
NSN 6685-00-336-3135
NSN 6105-01-168-8335
NSN 5895-00-019-3428
NSN 5895-01-197-7401
NSN 5855-00-466-2309
NSN 5905-00-113-5161
NSN 5996-01-339-2920