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 5905-01-427-3804
NSN 6130-01-004-2911
NSN 6145-01-506-0407
NSN 6650-01-276-4486
NSN 6145-01-220-9158
NSN 6650-01-055-7512
NSN 6150-01-424-0996
NSN 5915-01-515-8454
NSN 6220-01-420-8375
NSN 5985-00-004-7578
NSN 6150-00-452-1086
NSN 6110-01-603-3592