The tap drill sizes shown are reference values and may have to be altered to meet specific tapping requirements. EMUGE shall have no liability or responsibility of any kind resulting from the selection of a tap drill size from this chart. Values printed are correct at the time of printing and subject to change without notice.

Inch-Wire mm	Decimal Inch	Inch-Wire mm	Decimal Inch	Inch-Wire mm	Decimal Inch	Inch-Wire mm	Decimal Inch	Inch-Wire mm	Decimal Inch
0.1 mm	0.0039	1/16	0.0625	21	0.1590	9/32	0.2812	37/16	0.5781
0.2 mm	0.0079	52	0.0635	20	0.1610	L	0.2900	15.0 mm	0.5906
0.3 mm	0.0118	51	0.0670	19	0.1660	M	0.2950	19/32	0.5938
80	0.0135	50	0.0700	18	0.1695	19/64	0.2969	39/64	0.6094
79	0.0145	49	0.0730	11/64	0.1719	N	0.3020	5/8	0.6250
1/64	0.0156	48	0.0760	17	0.1730	5/16	0.3125	16.0 mm	0.6299
0.4 mm	0.0517	5/64	0.0781	16	0.1770	8.0 mm	0.3150	41/64	0.6406
78	0.0160	47	0.0785	15	0.1800	O	0.3160	21/32	0.6562
77	0.0180	2.0 mm	0.0787	14	0.1820	P	0.3230	17.0 mm	0.6693
0.5 mm	0.0197	46	0.0810	13	0.1850	21/64	0.3281	43/64	0.6719
76	0.0200	45	0.0820	3/16	0.1875	Q	0.3320	11/16	0.6875
75	0.0210	44	0.0860	12	0.1890	R	0.3390	45/64	0.7031
74	0.0225	43	0.0890	11	0.1910	11/32	0.3438	18.0 mm	0.7087
0.6 mm	0.0236	42	0.0935	10	0.1935	S	0.3480	23/32	0.7188
73	0.0240	3/32	0.0938	9	0.1960	9.0 mm	0.3543	47/64	0.7344
72	0.0250	41	0.0960	5.0 mm	0.1968	T	0.3580	19.0 mm	0.7480
71	0.0260	40	0.0980	8	0.1990	23/64	0.3594	3/4	0.7500
0.7 mm	0.0276	39	0.0995	7	0.2010	U	0.3680	49/64	0.7656
70	0.0280	38	0.1015	13/64	0.2031	3/8	0.3750	25/32	0.7812
69	0.0292	37	0.1040	6	0.2440	V	0.3770	20.0 mm	0.7874
68	0.0310	36	0.1065	5	0.2055	W	0.3860	51/64	0.7969
1/32	0.0312	7/64	0.1094	4	0.2090	25/64	0.3906	13/16	0.8125
0.8 mm	0.0315	35	0.1100	3	0.2130	10.0 mm	0.3937	21.0 mm	0.8268
67	0.0320	34	0.1110	7/32	0.2188	X	0.3970	53/64	0.8281
66	0.0330	33	0.1130	2	0.2210	Y	0.4040	27/32	0.8438
65	0.0350	32	0.1160	1	0.2280	12/32	0.4062	55/64	0.8594
0.9 mm	0.0354	3.0 mm	0.1181	A	0.2349	Z	0.4130	22.0 mm	0.8661
64	0.0360	31	0.1200	15/64	0.2344	27/64	0.4219	7/8	0.8750
63	0.0370	1/8	0.1250	6.0 mm	0.2362	11.0 mm	0.4331	57/64	0.8906
62	0.0380	30	0.1285	B	0.2380	7/16	0.4375	23.0 mm	0.9055
61	0.0390	29	0.1360	C	0.2420	29/64	0.4531	29/32	0.9062
1.0 mm	0.0394	28	0.1405	D	0.2460	15/32	0.4688	59/64	0.9219
60	0.400	9/64	0.1406	1/4	0.2500	12.0 mm	0.4724	15/16	0.9375
59	0.0410	27	0.1440	F	0.2570	31/64	0.4844	24.0 mm	0.9449
58	0.0420	26	0.1470	G	0.2610	1/2	0.5000	61/64	0.9531
57	0.0430	25	0.1495	17/64	0.2656	13.0 mm	0.5118	31/32	0.9688
56	0.0465	24	0.1520	H	0.2660	33/64	0.5156	25.0 mm	0.9842
3/64	0.0469	23	0.1540	I	0.2720	17/32	0.5312	63/64	0.9844
55	0.0520	5/32	0.1562	7.0 mm	0.2756	35/64	0.5469	1	1.000
54	0.0550	22	0.1570	J	0.2770	14.0 mm	0.5512
53	0.0595	4.0 mm	0.1575	K	0.2810	9/16	0.5625