5133-00-224-9103 (315)
NSN 5133-00-224-9103 (NIIN 00-224-9103) is a countersink in Federal Supply Class 5133, Drill Bits, Counterbores, And Countersinks: Hand And Machine — an angular cutting tool, usually made with angular relief, having one or more flutes with specific size angle cutting edges. Manufacturer part number 315; also referenced as GGG-C-613 TY2CLBSZ5/8 (General Services Administration); GGG-C-613 (Federal Specifications Promulgated); 315 5/8 (Mayhew Steel Products Inc).
Key specs: 52 rockwell c minimum and 63 rockwell c maximum hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); export Schedule B 8205.10.0000. Related NSN 5133-00-293-2297.