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 5996-01-563-8300
NSN 6105-01-261-0460
NSN 6145-00-866-8994
NSN 6130-01-448-9717
NSN 6240-01-216-4060
NSN 6320-01-583-6809
NSN 5990-01-083-9013
NSN 6685-01-359-5732
NSN 6150-01-594-0020
NSN 5915-00-204-7925
NSN 5950-00-258-0220
NSN 6650-00-801-0547