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 5985-01-336-3137
NSN 5835-01-125-2558
NSN 6620-01-004-7072
NSN 5920-01-117-0522
NSN 5990-01-442-3520
NSN 6685-00-111-1123
NSN 5950-00-200-1110
NSN 6645-01-620-4837
NSN 5990-01-116-2181
NSN 5985-00-508-7162
NSN 6685-01-525-9684
NSN 7035-00-003-7518