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 6145-00-290-1759
NSN 6150-01-189-4974
NSN 5895-01-116-3271
NSN 6320-00-284-1524
NSN 5945-01-578-0924
NSN 5915-00-054-6637
NSN 5975-01-245-3528
NSN 5920-01-082-4375
NSN 5920-01-089-3559
NSN 5985-01-583-5597
NSN 5985-01-447-6038
NSN 5985-01-657-1600