FORD U-MA003-8501 1989 Edition, March 1989
MATERIAL FOR DRILLS, STEP DRILLS, CENTRE DRILLS, COUNTER BORES, CORE DRILLS
AND COUNTER SINKS FOR MODERATE WEAR APPLICATIONS
The materials, treatment and conditions specified in this standard shall apply to the manufacture of drills, step drills, and centre drills of all dimensions for moderate wear applications.