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 6145-00-898-0219
NSN 6685-01-013-6485
NSN 6685-01-599-8093
NSN 5905-01-421-4157
NSN 5960-01-328-8248
NSN 6150-00-758-1530
NSN 5930-00-979-0270
NSN 7035-01-026-1171
NSN 5855-00-586-6255
NSN 5950-01-280-4762
NSN 5920-01-579-3754
NSN 5835-00-863-0959