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 6130-01-487-3158
NSN 6135-01-377-5729
NSN 5835-01-378-6804
NSN 5930-01-570-0431
NSN 6135-01-659-5393
NSN 5998-00-079-0199
NSN 5835-01-381-2683
NSN 4140-00-454-3786
NSN 5895-00-219-6078
NSN 6620-01-621-0719
NSN 5965-01-092-2698
NSN 5855-00-245-8461