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 5915-01-293-1069
NSN 5835-01-555-4262
NSN 6320-00-242-3300
NSN 7035-00-803-3056
NSN 6145-00-009-0619
NSN 6620-00-841-0346
NSN 6650-00-917-0436
NSN 5998-01-448-6535
NSN 5930-01-074-8849
NSN 6150-01-546-6097
NSN 5835-00-783-6620
NSN 6320-01-422-1212