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 5990-00-969-6565
NSN 6105-00-275-0826
NSN 6145-01-382-6025
NSN 6320-01-446-8050
NSN 6150-01-189-5943
NSN 6685-00-909-9768
NSN 5930-00-231-3800
NSN 5905-01-355-2411
NSN 5905-01-379-6596
NSN 6130-00-729-8968
NSN 2925-01-112-6822
NSN 5835-00-759-1109