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 5975-00-069-9324
NSN 6220-00-520-9109
NSN 5985-00-542-0597
NSN 5945-01-337-3848
NSN 5945-00-996-8486
NSN 5975-01-381-7075
NSN 5835-01-343-7516
NSN 6620-00-257-2783
NSN 5965-00-318-6479
NSN 6320-01-498-4954
NSN 5945-00-115-1090
NSN 5975-00-397-7404