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 5920-01-566-0665
NSN 5996-01-535-6443
NSN 5935-01-089-4772
NSN 5998-00-257-8053
NSN 4140-01-076-7481
NSN 5950-01-293-4205
NSN 6135-01-285-8807
NSN 6685-00-038-7886
NSN 5930-01-296-5431
NSN 5999-01-354-7824
NSN 6240-00-865-7447
NSN 5975-01-441-2623