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 5999-00-226-7859
NSN 5998-01-080-0352
NSN 6130-01-356-6263
NSN 5996-01-588-2770
NSN 6130-00-168-4251
NSN 7035-00-111-4389
NSN 5945-00-006-3533
NSN 6150-01-441-0823
NSN 5965-01-295-9842
NSN 6620-01-116-3983
NSN 5835-01-558-9444
NSN 5985-01-484-9342