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 5835-01-055-6859
NSN 5965-00-362-2158
NSN 5930-01-394-5916
NSN 5945-01-406-3497
NSN 6685-00-761-0711
NSN 6150-01-077-3225
NSN 6110-00-256-3150
NSN 5855-01-105-7793
NSN 5975-01-428-6574
NSN 5935-00-466-7379
NSN 6645-00-144-4868
NSN 6105-00-919-0017