AN121551 THRU AN121575 REV 2 NOTICE 2 9 SEPTEMBER 2001 AIR FORCE NAVY AERONAUTICAL STANDARD NUT, PLAIN, CASTELLATED HEXAGON AN121551 THRU AN121575 REV 2 , dated 10 JUNE 1994, has been reviewed and determined to be valid for use in acquisition. Custodians: Preparing activity: Army - AV DLA-IS Navy - AS Air Force - 99 AMSC N/A FSC 5310 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.INCH-POUND NOTICE OF VALIDATION Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-