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 7035-00-358-0470
NSN 6685-00-910-8898
NSN 6105-00-099-8818
NSN 5996-00-994-3986
NSN 2925-01-212-1040
NSN 5960-01-075-7732
NSN 7035-01-162-7452
NSN 5930-00-081-3761
NSN 6150-01-551-0844
NSN 6320-00-779-5923
NSN 5996-01-423-9423
NSN 4140-01-102-7798