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 5950-01-201-9148
NSN 5965-00-393-1294
NSN 6610-01-020-3764
NSN 6610-00-633-4338
NSN 2925-00-185-1618
NSN 5905-01-524-6667
NSN 6320-01-019-1028
NSN 6610-01-271-7593
NSN 6320-01-328-6575
NSN 6620-00-679-5830
NSN 6150-01-201-9128
NSN 5998-01-398-1725