Reduced id one end 0.519 in. Dia
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.)
Classification: Nuts of iron or steel
NSN 5930-01-043-9888
NSN 6240-01-206-4809
NSN 5835-01-184-3659
NSN 6135-01-290-1594
NSN 5905-00-876-9752
NSN 6150-00-964-7303
NSN 5895-00-558-9032
NSN 6620-01-323-7620
NSN 6145-00-409-6844
NSN 6145-00-226-9499
NSN 5925-01-359-4814
NSN 5945-01-455-6824