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 5950-01-115-4323
NSN 5910-00-035-5534
NSN 6650-01-386-6711
NSN 6650-01-216-2707
NSN 5915-01-408-9909
NSN 6650-01-463-8405
NSN 6320-01-204-2922
NSN 6150-00-953-2370
NSN 6650-00-372-6035
NSN 5985-01-588-0571
NSN 5935-01-096-8914
NSN 4140-01-408-7760