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 5999-00-314-4508
NSN 6320-01-425-1417
NSN 5910-00-552-9206
NSN 5935-00-647-4020
NSN 6220-01-260-3734
NSN 5905-01-343-4561
NSN 6620-01-531-3250
NSN 6105-00-099-8818
NSN 5935-00-075-3257
NSN 5998-00-081-7305
NSN 6240-00-161-8099
NSN 5996-00-630-4752