Tapping and Drilling Table – Thelen Tree Farm

Tapping Information

This page contains information regarding tap and clearance drills for American Standard machine screws from 0 to 1 3/4 (0.060 to 1.750 inches)

Here is the Metric Tapping Table

Machine Screw Size		Thds Per Inch	Minor Dia	Tap Drills				Clearance Hole Drills
				Alum, Brass, & Plasitcs 75% Thread		Stainless Steel, Steels & Iron 50% Thread		All Materials
				Alum, Brass, & Plasitcs 75% Thread		Stainless Steel, Steels & Iron 50% Thread		Close Fit		Free Fit
# or Dia	Major Dia			Drill Size	Dec. Equiv.	Drill Size	Decimal Equiv.	Drill Size	Dec. Equiv.	Drill Size	Dec. Equiv.
0	.060	80	.045	3/64	.047	55	.0520	52	.063	50	.070
1	.073	64	.054	53	.059	1/16	.0625	48	.076	46	.081
1	.073	72	.056	53	.059	52	.0635	48	.076	46	.081
2	.086	56	.064	50	.070	49	.0730	43	.089	41	.096
2	.086	64	.067	50	.070	48	.0760	43	.089	41	.096
3	.099	48	.073	47	.078	44	.0860	37	.104	35	.110
3	.099	56	.077	45	.082	43	.0890	37	.104	35	.110
4	.112	40	.081	43	.089	41	.0960	32	.116	30	.128
4	.112	48	.086	42	.093	40	.0980	32	.116	30	.128
5	.125	40	.094	38	.101	7/64	.1094	30	.128	29	.136
5	.125	44	.097	37	.104	35	.1100	30	.128	29	.136
6	.138	32	.100	36	.106	32	.1160	27	.144	25	.149
6	.138	40	.107	33	.113	31	.1200	27	.144	25	.149
8	.164	32	.126	29	.136	27	.1440	18	.169	16	.177
8	.164	36	.1300	29	.136	26	.1470	18	.169	16	.177
10	.190	24	.139	25	.149	20	.1610	9	.196	7	.201
10	.190	32	.152	21	.159	18	.1695	9	.196	7	.201
12	.216	24	.165	16	.177	12	.1890	2	.221	1	.228
		28	.172	14	.182	10	.1935
		32	.178	13	.185	9	.1960
1/4	.250	20	.189	7	.201	7/32	.2188	F	.257	H	.266
		28	.206	3	.213	1	.2280
		32	.212	7/32	.219	1	.2280
5/16	.312	18	.244	F	.257	J	.2770	P	.323	Q	.332
		24	.261	I	.272	9/32	.2812
		32	.274	9/32	.281	L	.2900
3/8	.375	16	.298	5/16	.312	Q	.3320	W	.386	X	.397
		24	.324	Q	.332	S	.3480
		32	.337	11/32	.344	T	.3580
7/16	.437	14	.3500	U	.368	25/64	.3906	29/64	.453	15/32	.469
		20	.376	25/64	.391	13/32	.4062
		28	.394	Y	.404	Z	.4130
1/2	.500	13	.406	27/64	.422	29/64	.4531	33/64	.516	17/32	.531
		20	.439	29/64	.453	15/32	.4688
		28	.456	15/32	.469	15/32	.4688
9/16	.562	12	.460	31/64	.484	33/64	.5156	37/64	.578	19/32	.594
		18	.494	33/64	.516	17/32	.5312
		24	.511	33/64	.516	17/32	.5312
5/8	.625	11	.513	17/32	.531	9/16	.5625	41/64	.641	21/32	.656
		18	.557	37/64	.578	19/32	.5938
		24	.574	37/64	.578	19/32	.5938
11/16	.687	24	.636	41/64	.641	21/32	.6562	45/64	.703	23/32	.656
3/4	.750	10	.627	21/32	.656	11/16	.6875	49/64	.766	25/32	.781
		16	.673	11/16	.687	45/64	.7031
		20	.689	45/64	.703	23/32	.7188
13/16	.812	20	.751	49/64	.766	25/32	.7812	53/64	.828	27/32	.844
7/8	.875	9	.739	49/64	.766	51/64	.7969	57/64	.891	29/32	.906
		14	.787	13/16	.812	53/64	.8281
		20	.814	53/64	.828	27/32	.8438
15/16	.937	20	.876	57/64	.891	29/32	.9062	61/64	.953	31/32	.969
1	1.000	8	.847	7/8	.875	59/64	.9219	1-1/64	1.016	1-1/32	1.031
		12	.898	15/16	.937	61/64	.9531
		20	.939	61/64	.953	31/32	.9688
1-1/16	1.062	18	.994	1.000	1.000	1-1/64	1.0156	1-5/64	1.078	1-3/32	1.0938
1-1/8	1.125	7	.950	63/64	.984	1-1/32	1.0313	1-9/64	1.141	1-5/32	1.156
		12	1.023	1-3/64	1.047	1-5/64	1.0781
		18	1.057	1-1/16	1.062	1-5/64	1.0781
1-3/16	1.187	18	1.119	1-1/8	1.125	1-9/64	1.1406	1-13/64	1.203	1-7/32	1.219
1-1/4	1.250	7	1.075	1-7/64	1.109	1-5/32	1.1562	1-17/64	1.266	1-9/32	1.281
		12	1.148	1-11/64	1.172	1-13/64	1.2031
		18	1.182	1-3/16	1.187	1-13/64	1.2031
1-5/16	1.312	18	1.244	1-1/4	1.250	1-17/64	1.2656	1-21/64	1.328	1-11/32	1.344
1-3/8	1.375	6	1.170	1-7/32	1.219	1-17/64	1.2656	1-25/64	1.391	1-13/32	1.406
		12	1.273	1-19/64	1.297	1-21/64	1.3281
		18	1.307	1-5/16	1.312	1-21/64	1.3281
1-7/16	1.437	18	1.369	1-3/8	1.375	1-25/64	1.3906	1-29/64	1.453	1-15/32	1.469
1-1/2	1.500	6	1.295	1-11/32	1.344	1-25/64	1.3906	1-33/64	1.516	1-17/32	1.531
		12	1.398	1-27/64	1.422	1-7/16	1.4375
		18	1.432	1-7/16	1.437	1-29/64	1.4531
1-9/16	1.562	18	1.494	1-12	1.500	1-33/64	1.5156	1-37/64	1.578	1-19/32	1.594
1-5/8	1.625	18	1.557	1-9/16	1.562	1-37/64	1.5781	1-41/64	1.641	1-21/32	1.656
1-11/16	1.687	18	1.619	1-5/8	1.625	1-41/64	1.6406	1-45/64	1.703	1-23/32	1.719
1-3/4	1.750	5	1.505	1-9/16	1.562	1-5/8	1.6250	1-49/64	1.766	1-25/32	1.781
# or Dia	Major Dia	Thds Per Inch	Minor Dia	Drill Size	Dec. Equiv.	Drill Size	Decimal Equiv.	Drill Size	Dec. Equiv.	Drill Size	Dec. Equiv.
Machine Screw Size				Alum, Brass, & Plasitcs 75% Thread		Stainless Steel, Steels & Iron 50% Thread		Close Fit		Free Fit
				Alum, Brass, & Plasitcs 75% Thread		Stainless Steel, Steels & Iron 50% Thread		All Materials
				Tap Drills				Clearance Hole Drills

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