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 6610-00-943-3136
NSN 5935-00-846-2181
NSN 5910-01-165-1107
NSN 5855-01-028-8387
NSN 5915-01-093-0801
NSN 5855-01-607-5982
NSN 6620-00-758-0797
NSN 6650-01-352-0424
NSN 5960-00-320-3093
NSN 5950-01-067-7948
NSN 5930-00-199-7633
NSN 6685-01-523-3394