1988 "CC" Colt / Junior thru 8 Models Service Repair Manual, P/N 507659, Page 75Get this manual
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Drill Si ze Conversion Chart SHOWING SIZES, FRACTIONAL AND DECIMAL INCH SIZES AND NUMBER DRILL SIZES
NJ mI bf r
Milli Meter
DecEq uiv
Frac Nu tional ber 22 21 20