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 6645-00-614-5302
NSN 6220-01-601-4748
NSN 6105-00-620-0902
NSN 6145-01-559-1494
NSN 6135-00-134-6648
NSN 5835-00-085-2287
NSN 5990-00-004-4158
NSN 5895-01-632-2862
NSN 5835-01-436-6549
NSN 5950-01-115-5685
NSN 5835-00-089-0588
NSN 5835-01-384-3206