3460-00-254-3060 (A-A-51129)
NSN 3460-00-254-3060 (NIIN 00-254-3060) is a solid machine mandrel in Federal Supply Class 3460, Machine Tool Accessories — a cylindrical-shaped tool with a slight taper on the over-all length, centered on each end with a flat milled on the ends for a holder. Manufacturer part number A-A-51129 (Federal Commercial Item Description, CAGE 58536); also referenced as A-A-51129 TY 1 SIZE 15 (Federal Commercial Item Description); 00M251 (Federal Specifications Promulgated).
Key specs: hardened (heat treated) finish, ground finish; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); unit of issue EA (each), $22.65 gov standard price; export Schedule B 8466.93.3050; ships at 0.38 lb / 0.012 cu ft.