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SAE TAP & DRILL CHART
THREAD SIZE	DRILL DIAMETER	TAP DRILL SIZE
0-80	.0469	3/64
1-64	.0595	No. 53
1-72	.0595	No. 53
2-56	.0700	No. 50
2-64	.0700	No. 50
3-48	.0785	No. 47
3-56	.0820	No. 45
4-40	.0890	No. 43
4-48	.0935	No. 42
5-40	.1015	No. 38
5-44	.1040	No. 37
6-32	.1065	No. 36
6-40	.1130	No. 33
8-32	.1360	No. 29
8-36	.1360	No. 29
10-24	.1495	No. 25
10-32	.1590	No. 21
12-24	.1770	No. 16
12-28	.1820	No. 14
1/4-20	.2010	No. 7
1/4-28	.2130	No. 3
5/16-18	.2570	F (17/64)
5/16-24	.2720	I (9/32)
3/8-16	.3125	5/16
3/8-24	.3320	Q
7/16-14	.3680	U
7/16-20	.3906	W (25/64)
1/2-13	.4219	27/64
1/2-20	.4531	29/64
9/16-12	.4844	31/64

METRIC TAP & DRILL CHART
THREAD SIZE	TAP DRILL SIZE MM	DRILL DIAMITER	TAP DRILL SIZE US
M1.6 X 0.35	1.23	.0492	No. 53 (3/64)
M1.8 X 0.35	1.45	.0571	No. 54
M2.0 X 0.40	1.60	.0630	1/16
M2.2 X 0.45	1.75	.0689	No. 51
M2.5 X 0.45	2.05	.0807	No. 47 (5/64)
M3.0 X 0.50	2.50	.0984	No. 40
M3.5 X 0.60	2.90	.1142	No. 33
M4.0 X 0.70	3.30	.1299	No. 30 (1/8)
M4.5 X 0.75	3.70	.1457	No. 27
M5.0 X 0.80	4.20	.1654	No. 19 (11/64)
M6.0 X 1.00	5.00	.1968	No. 9 (13/64)
M7.0 X 1.00	6.00	.2362	15/64
M8.0 X 1.25	6.70	.2638	G (17/64)
M8.0 X 1.00	7.00	.2656	I (17/64)
M10 X 1.50	8.50	.3346	Q (11/32)
M10 X 1.25	8.70	.3425	S (11/32)
M12 X 1.75	10.20	.4016	X (13/32)
M12 X 1.25	10.80	.4252	27/64
M14 X 2.00	12.00	.4724	15/32
M14 X 1.50	12.50	.4921	31/64

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