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 5915-01-330-4052
NSN 7035-01-300-8409
NSN 5910-01-485-3397
NSN 6240-01-040-5530
NSN 6135-01-557-9656
NSN 6240-01-452-0019
NSN 5910-00-112-4543
NSN 5945-00-784-7994
NSN 5999-00-285-2987
NSN 5855-00-237-4088
NSN 6320-01-458-1853
NSN 6685-00-518-4237