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 5990-00-461-5372
NSN 5975-01-204-6005
NSN 6105-00-265-7545
NSN 5998-01-399-0615
NSN 6685-01-433-6957
NSN 6110-01-052-5032
NSN 5990-01-147-5225
NSN 5930-00-297-8848
NSN 5935-00-180-4193
NSN 5835-00-466-8544
NSN 5960-01-570-8605
NSN 6220-01-578-2435