5 HSS 60Deg TiN Coated Combined Drill Countersink, Sowa High Performance Cutting Tools, Mfr#: 121925$47.99+
5x4 HSS 60Deg Long Combined Drill Countersink, Sowa High Performance Cutting Tools, Mfr#: 121935$50.45+
Drill/Tap/Countersink, Thread Size #10-24, 2 1/32 in Overall Length, Greenlee, Mfr#: DTAP10-24$11.59+