DRILL SELECTION CHART
size 0.10 to 1.99
size 2.00 to 3.99
size 4.00 to 5.95
size 6.00 to 9.92
size 10.00 to 19.84
size 20.00 to 25.40
DRILL AND TAPPING CHART
BSW Whitworth
UNC UNS*
UNF UNS*
Metric ISO Course
Metric ISO Fine
BSF
BA
Metric Conduit
BSPT (Taper Pipe)
NPT (Taper Pipe)
NPS (Parallel Pipe)
BSPF (Parallel Pipe)
Brass
Spark Plug
BS Conduit
