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 6150-01-388-3009
NSN 6150-01-529-7368
NSN 5965-01-412-5946
NSN 5930-01-224-8446
NSN 6320-01-272-7072
NSN 5996-00-325-6285
NSN 5960-00-195-6435
NSN 5915-01-562-1366
NSN 5960-01-425-1454
NSN 5960-01-381-2478
NSN 5915-00-468-2568
NSN 5960-00-267-1635