5133-00-245-2553 (GGG-D-751)
NSN 5133-00-245-2553 (NIIN 00-245-2553) is a twist drill in Federal Supply Class 5133, Drill Bits, Counterbores, And Countersinks: Hand And Machine — an end cutting tool having two or more cutting edges, and having helical flutes or grooves adjacent thereto for the admission of coolant and the ejection. Manufacturer part number GGG-D-751 (Federal Specifications Promulgated, CAGE 81348); also referenced as GGG-D-751 TYACL1 (General Services Administration).
Key specs: 40 rockwell c minimum and 53 rockwell c maximum hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); export Schedule B 8205.10.0000.