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 5945-00-472-3558
NSN 6135-00-299-6918
NSN 6110-01-254-1562
NSN 7035-01-265-0216
NSN 5990-01-265-8082
NSN 6650-00-945-3098
NSN 7035-01-181-2705
NSN 6145-00-679-3142
NSN 5925-01-025-9612
NSN 5920-00-725-6710
NSN 5996-01-147-6054
NSN 6610-01-079-6729