A nut, flat on top and bottom, having 4 flat sides. 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 5905-01-658-1092
NSN 6610-01-146-8061
NSN 5996-00-407-7103
NSN 6130-01-229-5291
NSN 5925-01-634-0664
NSN 6610-00-825-5774
NSN 5960-01-229-5052
NSN 5905-01-388-1451
NSN 6105-01-330-9482
NSN 6610-01-391-5092
NSN 6320-00-400-8042
NSN 5960-00-960-6805