Nut has 3 round indentations equally spaced around the flats
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.)
Classification: Nuts of iron or steel
NSN 7035-01-129-7834
NSN 6645-01-507-0208
NSN 6620-00-834-9430
NSN 5960-00-682-3598
NSN 5960-01-004-3994
NSN 5945-01-508-4344
NSN 5895-01-427-3727
NSN 6105-01-111-6235
NSN 5915-00-134-2974
NSN 6135-00-182-7008
NSN 6620-00-613-3023
NSN 5910-01-156-7383