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 6320-01-021-6633
NSN 5998-00-042-5723
NSN 5910-00-241-2877
NSN 5960-01-123-3313
NSN 6135-01-521-0378
NSN 5910-01-031-8094
NSN 6105-01-326-0325
NSN 5930-01-551-2074
NSN 2925-01-463-8856
NSN 5915-01-044-5260
NSN 6150-00-081-9928
NSN 6685-01-544-6067