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 7035-01-322-8180
NSN 5835-01-566-5462
NSN 4140-01-076-1352
NSN 6145-01-374-7599
NSN 6650-01-242-8086
NSN 6135-01-156-4627
NSN 5855-01-385-8846
NSN 5990-01-517-7848
NSN 6685-01-553-0431
NSN 5835-01-310-3846
NSN 5945-01-236-9217
NSN 6610-00-111-3159