AN121551 THRU AN121600
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- AN121551 THRU AN121575 (REV. 2) (NOTICE 2)., AIR FORCE – NAVY AERONAUTICAL STANDARD, NUT, PLAIN, CASTELLATED HEXAGON (9 SEP 2001)
- AN121576 THRU AN121600 (REV. 2), AIR FORCE-NAVY AERONAUTICAL STANDARD, NUT-CASTLE, CORROSION RESISTANT STEEL (S/S BY MS9358)
- MS9358C, MILITARY STANDARD, NUT, CASTELLATED, HEXAGON-A-286 (30 SEP 1994) [S/S BY SAE-AS9358]
