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 6645-00-179-8676
NSN 6130-00-955-9148
NSN 6685-01-114-7364
NSN 5990-01-437-4876
NSN 2925-01-583-5619
NSN 5930-01-422-1702
NSN 6105-01-100-3129
NSN 5835-01-126-9358
NSN 5985-00-042-8955
NSN 6685-00-935-6961
NSN 5965-01-065-5544
NSN 6320-00-370-7944