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 5925-01-634-0664
NSN 5905-01-408-9854
NSN 5920-00-738-1131
NSN 6620-01-034-4539
NSN 5855-01-027-1571
NSN 5999-00-816-9670
NSN 5925-00-611-4120
NSN 5920-01-334-9848
NSN 5925-00-429-9859
NSN 5915-00-234-9351
NSN 5985-01-352-5696
NSN 5855-01-442-5401