Tap	Fractional Drill Bit	Number Drill Bit	Letter Drill Bit
#0-80	3/64"	-	-
#1-64	-	53	-
#2-56	-	50	-
#3-48	-	47	-
#4-40	3/32"	43	-
#5-40	-	38	-
#6-32	7/64"	35	-
#8-32	-	29	-
#10-24	5/32"	25	-
#10-32	5/32"	21	-
#12-24	11/64"	16	-
1/4"-20	13/64"	7	-
1/4"-28	7/32"	3	-
5/16"-18	17/64"	-	F
5/16"-24	-	-	I
3/8"-16	5/16"	-	-
3/8"-24	21/64"	-	Q
7/16"-14	23/64"	-	U
7/16"-20	25/64"	-	-
1/2"-13	27/64"	-	-
1/2"-20	29/64"	-	-
9/16"-12	31/64"	-	-
9/16"-18	33/64"	-	-
5/8"-11	17/32"	-	-
5/8"-18	37/64"	-	-
3/4"-10	21/32"	-	-
3/4"-16	11/16"	-	-