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 6650-01-090-0719
NSN 5985-00-614-2744
NSN 5930-00-334-7596
NSN 5965-00-246-5612
NSN 5855-01-362-7066
NSN 6135-01-433-2062
NSN 6105-01-167-7651
NSN 4140-01-031-0286
NSN 5996-00-683-4118
NSN 5950-00-276-8584
NSN 5835-01-391-4556
NSN 6320-01-627-1594