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 6110-01-274-1610
NSN 5996-01-578-6162
NSN 5895-01-232-3718
NSN 6150-01-095-5214
NSN 4140-01-189-2589
NSN 6685-00-242-6722
NSN 6135-00-309-0074
NSN 5998-00-975-5431
NSN 6650-00-539-7298
NSN 5945-01-422-2000
NSN 6240-01-164-5019
NSN 6150-00-374-9318