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 5915-00-279-2973
NSN 5935-01-190-1333
NSN 5999-01-422-0240
NSN 5910-00-567-3285
NSN 5990-00-772-9277
NSN 5905-01-429-7665
NSN 6220-01-153-1275
NSN 5950-00-566-9501
NSN 5975-01-527-8732
NSN 5935-00-111-2417
NSN 6150-01-498-1412
NSN 5925-01-309-7360