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 6105-01-484-5557
NSN 6320-01-371-3047
NSN 6220-00-111-0921
NSN 5915-00-468-0086
NSN 6135-01-074-8220
NSN 6240-01-011-8126
NSN 5920-01-280-9147
NSN 5855-01-391-9334
NSN 5965-01-198-3256
NSN 5950-01-204-6612
NSN 5996-01-620-7742
NSN 6105-00-769-8020