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 5985-01-023-1568
NSN 5998-01-371-5869
NSN 6220-01-179-6242
NSN 6220-01-171-9557
NSN 6620-01-322-5576
NSN 6620-01-415-1622
NSN 6150-01-578-6786
NSN 6645-00-911-2999
NSN 6220-01-154-5436
NSN 5835-00-725-2087
NSN 5950-01-371-3688
NSN 5855-01-020-7982