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Tap Drill & Clearance Chart SP-TD-01

SP-TD-01

Tap Drill & Clearance Chart

SizePlate

1/4-20 UNC · tap with

#7 drill

.2010″

5.11 mm · 75% thread

Metric drill: 5.1 mm · .2008
Close fit: F · .2570
Free fit: H · .2660
Full page: 1/4-20 specs →

Unified inch (UNC / UNF)

Thread	Series	Tap drill (75%)		Close fit		Free fit
Thread	Series	Drill	in	Drill	in	Drill	in
#0-80	UNF	3/64	.0469	#52	.0635	#50	.0700
#1-64	UNC	#53	.0595	#48	.0760	#46	.0810
#1-72	UNF	#53	.0595	#48	.0760	#46	.0810
#2-56	UNC	#50	.0700	#43	.0890	#41	.0960
#2-64	UNF	#50	.0700	#43	.0890	#41	.0960
#3-48	UNC	#47	.0785	#37	.1040	#35	.1100
#3-56	UNF	#45	.0820	#37	.1040	#35	.1100
#4-40	UNC	#43	.0890	#32	.1160	#30	.1285
#4-48	UNF	#42	.0935	#32	.1160	#30	.1285
#5-40	UNC	#38	.1015	#30	.1285	#29	.1360
#5-44	UNF	#37	.1040	#30	.1285	#29	.1360
#6-32	UNC	#36	.1065	#27	.1440	#25	.1495
#6-40	UNF	#33	.1130	#27	.1440	#25	.1495
#8-32	UNC	#29	.1360	#18	.1695	#16	.1770
#8-36	UNF	#29	.1360	#18	.1695	#16	.1770
#10-24	UNC	#25	.1495	#9	.1960	#7	.2010
#10-32	UNF	#21	.1590	#9	.1960	#7	.2010
#12-24	UNC	#16	.1770	#2	.2210	#1	.2280
#12-28	UNF	#14	.1820	#2	.2210	#1	.2280
1/4-20	UNC	#7	.2010	F	.2570	H	.2660
1/4-28	UNF	#3	.2130	F	.2570	H	.2660
5/16-18	UNC	F	.2570	P	.3230	Q	.3320
5/16-24	UNF	I	.2720	P	.3230	Q	.3320
3/8-16	UNC	5/16	.3125	W	.3860	X	.3970
3/8-24	UNF	Q	.3320	W	.3860	X	.3970
7/16-14	UNC	U	.3680	29/64	.4531	15/32	.4688
7/16-20	UNF	25/64	.3906	29/64	.4531	15/32	.4688
1/2-13	UNC	27/64	.4219	33/64	.5156	17/32	.5313
1/2-20	UNF	29/64	.4531	33/64	.5156	17/32	.5313
9/16-12	UNC	31/64	.4844	37/64	.5781	19/32	.5938
9/16-18	UNF	33/64	.5156	37/64	.5781	19/32	.5938
5/8-11	UNC	17/32	.5313	41/64	.6406	21/32	.6563
5/8-18	UNF	37/64	.5781	41/64	.6406	21/32	.6563
3/4-10	UNC	21/32	.6563	49/64	.7656	25/32	.7813
3/4-16	UNF	11/16	.6875	49/64	.7656	25/32	.7813
7/8-9	UNC	49/64	.7656	57/64	.8906	29/32	.9063
7/8-14	UNF	13/16	.8125	57/64	.8906	29/32	.9063
1-8	UNC	7/8	.8750	1-1/64	1.0156	1-1/32	1.0313
1-12	UNF	59/64	.9219	1-1/64	1.0156	1-1/32	1.0313

ISO metric

Thread	Tap drill		Clearance (mm)
Thread	mm	in	Close	Normal	Free
M1.6 × 0.35	1.25	.0492	1.7	1.8	2
M2 × 0.4	1.6	.0630	2.2	2.4	2.6
M2.5 × 0.45	2.05	.0807	2.7	2.9	3.1
M3 × 0.5	2.5	.0984	3.2	3.4	3.6
M3 × 0.35	2.65	.1043	3.2	3.4	3.6
M4 × 0.7	3.3	.1299	4.3	4.5	4.8
M4 × 0.5	3.5	.1378	4.3	4.5	4.8
M5 × 0.8	4.2	.1654	5.3	5.5	5.8
M5 × 0.5	4.5	.1772	5.3	5.5	5.8
M6 × 1.0	5	.1969	6.4	6.6	7
M6 × 0.75	5.2	.2047	6.4	6.6	7
M8 × 1.25	6.8	.2677	8.4	9	10
M8 × 1.0	7	.2756	8.4	9	10
M10 × 1.5	8.5	.3346	10.5	11	12
M10 × 1.25	8.8	.3465	10.5	11	12
M10 × 1.0	9	.3543	10.5	11	12
M12 × 1.75	10.2	.4016	13	13.5	14.5
M12 × 1.5	10.5	.4134	13	13.5	14.5
M12 × 1.25	10.8	.4252	13	13.5	14.5
M14 × 2.0	12	.4724	15	15.5	16.5
M14 × 1.5	12.5	.4921	15	15.5	16.5
M16 × 2.0	14	.5512	17	17.5	18.5
M16 × 1.5	14.5	.5709	17	17.5	18.5
M20 × 2.5	17.5	.6890	21	22	24
M20 × 1.5	18.5	.7283	21	22	24
M24 × 3.0	21	.8268	25	26	28
M24 × 2.0	22	.8661	25	26	28

Chart

SP-TD-01

Standard

ASME B1.1 · ISO 261 · ISO 273

Rev

A · Oct 2026

Checked

2 references · sources

Tap drills are for cutting taps in steel and aluminum. Thread-forming (roll) taps need a larger hole. Metric tap drills are major diameter minus pitch, rounded to a stocked drill.

Drill Bit Size Chart SP-DB-01

SP-DB-01

Drill Bit Size Chart

SizePlate

Closest drill to 5.1 mm

#7 drill

5.11 mm

.2010″ · +0.01 mm over

Next smaller: #8 · .1990
Next larger: 13/64 · .2031
Metric drill: 5.1 mm · .2008
Standard for: #10 free fit, 1/4-20 tap

Drill	Type	Decimal in	mm	Standard for
#80	Number	.0135	0.34
#79	Number	.0145	0.37
1/64	Fraction	.0156	0.4
#78	Number	.0160	0.41
#77	Number	.0180	0.46
0.5 mm	Metric	.0197	0.5
#76	Number	.0200	0.51
#75	Number	.0210	0.53
#74	Number	.0225	0.57
0.6 mm	Metric	.0236	0.6
#73	Number	.0240	0.61
#72	Number	.0250	0.64
#71	Number	.0260	0.66
0.7 mm	Metric	.0276	0.7
#70	Number	.0280	0.71
#69	Number	.0292	0.74
#68	Number	.0310	0.79
1/32	Fraction	.0313	0.8
0.8 mm	Metric	.0315	0.8
#67	Number	.0320	0.81
#66	Number	.0330	0.84
#65	Number	.0350	0.89
0.9 mm	Metric	.0354	0.9
#64	Number	.0360	0.91
#63	Number	.0370	0.94
#62	Number	.0380	0.97
#61	Number	.0390	0.99
1 mm	Metric	.0394	1
#60	Number	.0400	1.02
#59	Number	.0410	1.04
#58	Number	.0420	1.07
#57	Number	.0430	1.09
1.1 mm	Metric	.0433	1.1
#56	Number	.0465	1.18
3/64	Fraction	.0469	1.19	#0-80 tap
1.2 mm	Metric	.0472	1.2
1.25 mm	Metric	.0492	1.25	M1.6 × 0.35 tap
1.3 mm	Metric	.0512	1.3
#55	Number	.0520	1.32
#54	Number	.0550	1.4
1.4 mm	Metric	.0551	1.4
1.5 mm	Metric	.0591	1.5
#53	Number	.0595	1.51	#1-64 tap, #1-72 tap
1/16	Fraction	.0625	1.59
1.6 mm	Metric	.0630	1.6	M2 × 0.4 tap
#52	Number	.0635	1.61	#0 close fit
1.7 mm	Metric	.0669	1.7
#51	Number	.0670	1.7
#50	Number	.0700	1.78	#0 free fit, #2-56 tap, #2-64 tap
1.8 mm	Metric	.0709	1.8
#49	Number	.0730	1.85
1.9 mm	Metric	.0748	1.9
#48	Number	.0760	1.93	#1 close fit
5/64	Fraction	.0781	1.98
#47	Number	.0785	1.99	#3-48 tap
2 mm	Metric	.0787	2
2.05 mm	Metric	.0807	2.05	M2.5 × 0.45 tap
#46	Number	.0810	2.06	#1 free fit
#45	Number	.0820	2.08	#3-56 tap
2.1 mm	Metric	.0827	2.1
#44	Number	.0860	2.18
2.2 mm	Metric	.0866	2.2
#43	Number	.0890	2.26	#2 close fit, #4-40 tap
2.3 mm	Metric	.0906	2.3
#42	Number	.0935	2.37	#4-48 tap
3/32	Fraction	.0938	2.38
2.4 mm	Metric	.0945	2.4
#41	Number	.0960	2.44	#2 free fit
#40	Number	.0980	2.49
2.5 mm	Metric	.0984	2.5	M3 × 0.5 tap
#39	Number	.0995	2.53
#38	Number	.1015	2.58	#5-40 tap
2.6 mm	Metric	.1024	2.6
#37	Number	.1040	2.64	#3 close fit, #5-44 tap
2.65 mm	Metric	.1043	2.65	M3 × 0.35 tap
2.7 mm	Metric	.1063	2.7
#36	Number	.1065	2.71	#6-32 tap
7/64	Fraction	.1094	2.78
#35	Number	.1100	2.79	#3 free fit
2.8 mm	Metric	.1102	2.8
#34	Number	.1110	2.82
#33	Number	.1130	2.87	#6-40 tap
2.9 mm	Metric	.1142	2.9
#32	Number	.1160	2.95	#4 close fit
3 mm	Metric	.1181	3
#31	Number	.1200	3.05
3.1 mm	Metric	.1220	3.1
1/8	Fraction	.1250	3.17
3.2 mm	Metric	.1260	3.2
#30	Number	.1285	3.26	#4 free fit, #5 close fit
3.3 mm	Metric	.1299	3.3	M4 × 0.7 tap
3.4 mm	Metric	.1339	3.4
#29	Number	.1360	3.45	#5 free fit, #8-32 tap, #8-36 tap
3.5 mm	Metric	.1378	3.5	M4 × 0.5 tap
#28	Number	.1405	3.57
9/64	Fraction	.1406	3.57
3.6 mm	Metric	.1417	3.6
#27	Number	.1440	3.66	#6 close fit
3.7 mm	Metric	.1457	3.7
#26	Number	.1470	3.73
#25	Number	.1495	3.8	#6 free fit, #10-24 tap
3.8 mm	Metric	.1496	3.8
#24	Number	.1520	3.86
3.9 mm	Metric	.1535	3.9
#23	Number	.1540	3.91
5/32	Fraction	.1563	3.97
#22	Number	.1570	3.99
4 mm	Metric	.1575	4
#21	Number	.1590	4.04	#10-32 tap
#20	Number	.1610	4.09
4.1 mm	Metric	.1614	4.1
4.2 mm	Metric	.1654	4.2	M5 × 0.8 tap
#19	Number	.1660	4.22
4.3 mm	Metric	.1693	4.3
#18	Number	.1695	4.31	#8 close fit
11/64	Fraction	.1719	4.37
#17	Number	.1730	4.39
4.4 mm	Metric	.1732	4.4
#16	Number	.1770	4.5	#8 free fit, #12-24 tap
4.5 mm	Metric	.1772	4.5	M5 × 0.5 tap
#15	Number	.1800	4.57
4.6 mm	Metric	.1811	4.6
#14	Number	.1820	4.62	#12-28 tap
#13	Number	.1850	4.7
4.7 mm	Metric	.1850	4.7
3/16	Fraction	.1875	4.76
4.8 mm	Metric	.1890	4.8
#12	Number	.1890	4.8
#11	Number	.1910	4.85
4.9 mm	Metric	.1929	4.9
#10	Number	.1935	4.91
#9	Number	.1960	4.98	#10 close fit
5 mm	Metric	.1969	5	M6 × 1.0 tap
#8	Number	.1990	5.05
5.1 mm	Metric	.2008	5.1
#7	Number	.2010	5.11	#10 free fit, 1/4-20 tap
13/64	Fraction	.2031	5.16
#6	Number	.2040	5.18
5.2 mm	Metric	.2047	5.2	M6 × 0.75 tap
#5	Number	.2055	5.22
5.3 mm	Metric	.2087	5.3
#4	Number	.2090	5.31
5.4 mm	Metric	.2126	5.4
#3	Number	.2130	5.41	1/4-28 tap
5.5 mm	Metric	.2165	5.5
7/32	Fraction	.2188	5.56
5.6 mm	Metric	.2205	5.6
#2	Number	.2210	5.61	#12 close fit
5.7 mm	Metric	.2244	5.7
#1	Number	.2280	5.79	#12 free fit
5.8 mm	Metric	.2283	5.8
5.9 mm	Metric	.2323	5.9
A	Letter	.2340	5.94
15/64	Fraction	.2344	5.95
6 mm	Metric	.2362	6
B	Letter	.2380	6.05
6.1 mm	Metric	.2402	6.1
C	Letter	.2420	6.15
6.2 mm	Metric	.2441	6.2
D	Letter	.2460	6.25
6.3 mm	Metric	.2480	6.3
1/4	Fraction	.2500	6.35
E	Letter	.2500	6.35
6.4 mm	Metric	.2520	6.4
6.5 mm	Metric	.2559	6.5
F	Letter	.2570	6.53	1/4 close fit, 5/16-18 tap
6.6 mm	Metric	.2598	6.6
G	Letter	.2610	6.63
6.7 mm	Metric	.2638	6.7
17/64	Fraction	.2656	6.75
H	Letter	.2660	6.76	1/4 free fit
6.8 mm	Metric	.2677	6.8	M8 × 1.25 tap
6.9 mm	Metric	.2717	6.9
I	Letter	.2720	6.91	5/16-24 tap
7 mm	Metric	.2756	7	M8 × 1.0 tap
J	Letter	.2770	7.04
7.1 mm	Metric	.2795	7.1
K	Letter	.2810	7.14
9/32	Fraction	.2813	7.15
7.2 mm	Metric	.2835	7.2
7.3 mm	Metric	.2874	7.3
L	Letter	.2900	7.37
7.4 mm	Metric	.2913	7.4
M	Letter	.2950	7.49
7.5 mm	Metric	.2953	7.5
19/64	Fraction	.2969	7.54
7.6 mm	Metric	.2992	7.6
N	Letter	.3020	7.67
7.7 mm	Metric	.3031	7.7
7.8 mm	Metric	.3071	7.8
7.9 mm	Metric	.3110	7.9
5/16	Fraction	.3125	7.94	3/8-16 tap
8 mm	Metric	.3150	8
O	Letter	.3160	8.03
8.1 mm	Metric	.3189	8.1
8.2 mm	Metric	.3228	8.2
P	Letter	.3230	8.2	5/16 close fit
8.3 mm	Metric	.3268	8.3
21/64	Fraction	.3281	8.33
8.4 mm	Metric	.3307	8.4
Q	Letter	.3320	8.43	5/16 free fit, 3/8-24 tap
8.5 mm	Metric	.3346	8.5	M10 × 1.5 tap
8.6 mm	Metric	.3386	8.6
R	Letter	.3390	8.61
8.7 mm	Metric	.3425	8.7
11/32	Fraction	.3438	8.73
8.8 mm	Metric	.3465	8.8	M10 × 1.25 tap
S	Letter	.3480	8.84
8.9 mm	Metric	.3504	8.9
9 mm	Metric	.3543	9	M10 × 1.0 tap
T	Letter	.3580	9.09
9.1 mm	Metric	.3583	9.1
23/64	Fraction	.3594	9.13
9.2 mm	Metric	.3622	9.2
9.3 mm	Metric	.3661	9.3
U	Letter	.3680	9.35	7/16-14 tap
9.4 mm	Metric	.3701	9.4
9.5 mm	Metric	.3740	9.5
3/8	Fraction	.3750	9.52
V	Letter	.3770	9.58
9.6 mm	Metric	.3780	9.6
9.7 mm	Metric	.3819	9.7
9.8 mm	Metric	.3858	9.8
W	Letter	.3860	9.8	3/8 close fit
9.9 mm	Metric	.3898	9.9
25/64	Fraction	.3906	9.92	7/16-20 tap
10 mm	Metric	.3937	10
X	Letter	.3970	10.08	3/8 free fit
10.1 mm	Metric	.3976	10.1
10.2 mm	Metric	.4016	10.2	M12 × 1.75 tap
Y	Letter	.4040	10.26
10.3 mm	Metric	.4055	10.3
13/32	Fraction	.4063	10.32
10.4 mm	Metric	.4094	10.4
Z	Letter	.4130	10.49
10.5 mm	Metric	.4134	10.5	M12 × 1.5 tap
10.6 mm	Metric	.4173	10.6
10.7 mm	Metric	.4213	10.7
27/64	Fraction	.4219	10.72	1/2-13 tap
10.8 mm	Metric	.4252	10.8	M12 × 1.25 tap
10.9 mm	Metric	.4291	10.9
11 mm	Metric	.4331	11
11.1 mm	Metric	.4370	11.1
7/16	Fraction	.4375	11.11
11.2 mm	Metric	.4409	11.2
11.3 mm	Metric	.4449	11.3
11.4 mm	Metric	.4488	11.4
11.5 mm	Metric	.4528	11.5
29/64	Fraction	.4531	11.51	7/16 close fit, 1/2-20 tap
11.6 mm	Metric	.4567	11.6
11.7 mm	Metric	.4606	11.7
11.8 mm	Metric	.4646	11.8
11.9 mm	Metric	.4685	11.9
15/32	Fraction	.4688	11.91	7/16 free fit
12 mm	Metric	.4724	12	M14 × 2.0 tap
12.1 mm	Metric	.4764	12.1
12.2 mm	Metric	.4803	12.2
12.3 mm	Metric	.4843	12.3
31/64	Fraction	.4844	12.3	9/16-12 tap
12.4 mm	Metric	.4882	12.4
12.5 mm	Metric	.4921	12.5	M14 × 1.5 tap
12.6 mm	Metric	.4961	12.6
1/2	Fraction	.5000	12.7
12.7 mm	Metric	.5000	12.7
12.8 mm	Metric	.5039	12.8
12.9 mm	Metric	.5079	12.9
13 mm	Metric	.5118	13
33/64	Fraction	.5156	13.1	1/2 close fit, 9/16-18 tap
17/32	Fraction	.5313	13.5	1/2 free fit, 5/8-11 tap
13.5 mm	Metric	.5315	13.5
35/64	Fraction	.5469	13.89
14 mm	Metric	.5512	14	M16 × 2.0 tap
9/16	Fraction	.5625	14.29
14.5 mm	Metric	.5709	14.5	M16 × 1.5 tap
37/64	Fraction	.5781	14.68	9/16 close fit, 5/8-18 tap
15 mm	Metric	.5906	15
19/32	Fraction	.5938	15.08	9/16 free fit
39/64	Fraction	.6094	15.48
15.5 mm	Metric	.6102	15.5
5/8	Fraction	.6250	15.88
16 mm	Metric	.6299	16
41/64	Fraction	.6406	16.27	5/8 close fit
16.5 mm	Metric	.6496	16.5
21/32	Fraction	.6563	16.67	5/8 free fit, 3/4-10 tap
17 mm	Metric	.6693	17
43/64	Fraction	.6719	17.07
11/16	Fraction	.6875	17.46	3/4-16 tap
17.5 mm	Metric	.6890	17.5	M20 × 2.5 tap
45/64	Fraction	.7031	17.86
18 mm	Metric	.7087	18
23/32	Fraction	.7188	18.26
18.5 mm	Metric	.7283	18.5	M20 × 1.5 tap
47/64	Fraction	.7344	18.65
19 mm	Metric	.7480	19
3/4	Fraction	.7500	19.05
49/64	Fraction	.7656	19.45	3/4 close fit, 7/8-9 tap
19.5 mm	Metric	.7677	19.5
25/32	Fraction	.7813	19.85	3/4 free fit
20 mm	Metric	.7874	20
51/64	Fraction	.7969	20.24
20.5 mm	Metric	.8071	20.5
13/16	Fraction	.8125	20.64	7/8-14 tap
21 mm	Metric	.8268	21	M24 × 3.0 tap
53/64	Fraction	.8281	21.03
27/32	Fraction	.8438	21.43
21.5 mm	Metric	.8465	21.5
55/64	Fraction	.8594	21.83
22 mm	Metric	.8661	22	M24 × 2.0 tap
7/8	Fraction	.8750	22.22	1-8 tap
22.5 mm	Metric	.8858	22.5
57/64	Fraction	.8906	22.62	7/8 close fit
23 mm	Metric	.9055	23
29/32	Fraction	.9063	23.02	7/8 free fit
59/64	Fraction	.9219	23.42	1-12 tap
23.5 mm	Metric	.9252	23.5
15/16	Fraction	.9375	23.81
24 mm	Metric	.9449	24
61/64	Fraction	.9531	24.21
24.5 mm	Metric	.9646	24.5
31/32	Fraction	.9688	24.61
25 mm	Metric	.9843	25
63/64	Fraction	.9844	25
1	Fraction	1.0000	25.4
1-1/64	Fraction	1.0156	25.8	1 close fit
1-1/32	Fraction	1.0313	26.2	1 free fit

Drill	in	mm
#80	.0135	0.34
#79	.0145	0.37
1/64	.0156	0.4
#78	.0160	0.41
#77	.0180	0.46
0.5 mm	.0197	0.5
#76	.0200	0.51
#75	.0210	0.53
#74	.0225	0.57
0.6 mm	.0236	0.6
#73	.0240	0.61
#72	.0250	0.64
#71	.0260	0.66
0.7 mm	.0276	0.7
#70	.0280	0.71
#69	.0292	0.74
#68	.0310	0.79
1/32	.0313	0.8
0.8 mm	.0315	0.8
#67	.0320	0.81
#66	.0330	0.84
#65	.0350	0.89
0.9 mm	.0354	0.9
#64	.0360	0.91
#63	.0370	0.94
#62	.0380	0.97
#61	.0390	0.99
1 mm	.0394	1
#60	.0400	1.02
#59	.0410	1.04
#58	.0420	1.07
#57	.0430	1.09
1.1 mm	.0433	1.1
#56	.0465	1.18
3/64	.0469	1.19
1.2 mm	.0472	1.2
1.25 mm	.0492	1.25
1.3 mm	.0512	1.3
#55	.0520	1.32
#54	.0550	1.4
1.4 mm	.0551	1.4
1.5 mm	.0591	1.5
#53	.0595	1.51
1/16	.0625	1.59
1.6 mm	.0630	1.6
#52	.0635	1.61
1.7 mm	.0669	1.7
#51	.0670	1.7
#50	.0700	1.78
1.8 mm	.0709	1.8
#49	.0730	1.85
1.9 mm	.0748	1.9
#48	.0760	1.93
5/64	.0781	1.98
#47	.0785	1.99
2 mm	.0787	2
2.05 mm	.0807	2.05
#46	.0810	2.06
#45	.0820	2.08
2.1 mm	.0827	2.1
#44	.0860	2.18
2.2 mm	.0866	2.2
#43	.0890	2.26
2.3 mm	.0906	2.3
#42	.0935	2.37
3/32	.0938	2.38
2.4 mm	.0945	2.4
#41	.0960	2.44
#40	.0980	2.49
2.5 mm	.0984	2.5
#39	.0995	2.53
#38	.1015	2.58
2.6 mm	.1024	2.6
#37	.1040	2.64
2.65 mm	.1043	2.65
2.7 mm	.1063	2.7
#36	.1065	2.71
7/64	.1094	2.78
#35	.1100	2.79
2.8 mm	.1102	2.8
#34	.1110	2.82
#33	.1130	2.87
2.9 mm	.1142	2.9
#32	.1160	2.95
3 mm	.1181	3
#31	.1200	3.05
3.1 mm	.1220	3.1
1/8	.1250	3.17
3.2 mm	.1260	3.2
#30	.1285	3.26
3.3 mm	.1299	3.3
3.4 mm	.1339	3.4
#29	.1360	3.45
3.5 mm	.1378	3.5
#28	.1405	3.57
9/64	.1406	3.57
3.6 mm	.1417	3.6
#27	.1440	3.66
3.7 mm	.1457	3.7
#26	.1470	3.73
#25	.1495	3.8
3.8 mm	.1496	3.8
#24	.1520	3.86
3.9 mm	.1535	3.9
#23	.1540	3.91
5/32	.1563	3.97
#22	.1570	3.99
4 mm	.1575	4
#21	.1590	4.04

Drill	in	mm
#20	.1610	4.09
4.1 mm	.1614	4.1
4.2 mm	.1654	4.2
#19	.1660	4.22
4.3 mm	.1693	4.3
#18	.1695	4.31
11/64	.1719	4.37
#17	.1730	4.39
4.4 mm	.1732	4.4
#16	.1770	4.5
4.5 mm	.1772	4.5
#15	.1800	4.57
4.6 mm	.1811	4.6
#14	.1820	4.62
#13	.1850	4.7
4.7 mm	.1850	4.7
3/16	.1875	4.76
4.8 mm	.1890	4.8
#12	.1890	4.8
#11	.1910	4.85
4.9 mm	.1929	4.9
#10	.1935	4.91
#9	.1960	4.98
5 mm	.1969	5
#8	.1990	5.05
5.1 mm	.2008	5.1
#7	.2010	5.11
13/64	.2031	5.16
#6	.2040	5.18
5.2 mm	.2047	5.2
#5	.2055	5.22
5.3 mm	.2087	5.3
#4	.2090	5.31
5.4 mm	.2126	5.4
#3	.2130	5.41
5.5 mm	.2165	5.5
7/32	.2188	5.56
5.6 mm	.2205	5.6
#2	.2210	5.61
5.7 mm	.2244	5.7
#1	.2280	5.79
5.8 mm	.2283	5.8
5.9 mm	.2323	5.9
A	.2340	5.94
15/64	.2344	5.95
6 mm	.2362	6
B	.2380	6.05
6.1 mm	.2402	6.1
C	.2420	6.15
6.2 mm	.2441	6.2
D	.2460	6.25
6.3 mm	.2480	6.3
1/4	.2500	6.35
E	.2500	6.35
6.4 mm	.2520	6.4
6.5 mm	.2559	6.5
F	.2570	6.53
6.6 mm	.2598	6.6
G	.2610	6.63
6.7 mm	.2638	6.7
17/64	.2656	6.75
H	.2660	6.76
6.8 mm	.2677	6.8
6.9 mm	.2717	6.9
I	.2720	6.91
7 mm	.2756	7
J	.2770	7.04
7.1 mm	.2795	7.1
K	.2810	7.14
9/32	.2813	7.15
7.2 mm	.2835	7.2
7.3 mm	.2874	7.3
L	.2900	7.37
7.4 mm	.2913	7.4
M	.2950	7.49
7.5 mm	.2953	7.5
19/64	.2969	7.54
7.6 mm	.2992	7.6
N	.3020	7.67
7.7 mm	.3031	7.7
7.8 mm	.3071	7.8
7.9 mm	.3110	7.9
5/16	.3125	7.94
8 mm	.3150	8
O	.3160	8.03
8.1 mm	.3189	8.1
8.2 mm	.3228	8.2
P	.3230	8.2
8.3 mm	.3268	8.3
21/64	.3281	8.33
8.4 mm	.3307	8.4
Q	.3320	8.43
8.5 mm	.3346	8.5
8.6 mm	.3386	8.6
R	.3390	8.61
8.7 mm	.3425	8.7
11/32	.3438	8.73
8.8 mm	.3465	8.8
S	.3480	8.84
8.9 mm	.3504	8.9
9 mm	.3543	9
T	.3580	9.09
9.1 mm	.3583	9.1
23/64	.3594	9.13
9.2 mm	.3622	9.2
9.3 mm	.3661	9.3
U	.3680	9.35
9.4 mm	.3701	9.4
9.5 mm	.3740	9.5

Drill	in	mm
3/8	.3750	9.52
V	.3770	9.58
9.6 mm	.3780	9.6
9.7 mm	.3819	9.7
9.8 mm	.3858	9.8
W	.3860	9.8
9.9 mm	.3898	9.9
25/64	.3906	9.92
10 mm	.3937	10
X	.3970	10.08
10.1 mm	.3976	10.1
10.2 mm	.4016	10.2
Y	.4040	10.26
10.3 mm	.4055	10.3
13/32	.4063	10.32
10.4 mm	.4094	10.4
Z	.4130	10.49
10.5 mm	.4134	10.5
10.6 mm	.4173	10.6
10.7 mm	.4213	10.7
27/64	.4219	10.72
10.8 mm	.4252	10.8
10.9 mm	.4291	10.9
11 mm	.4331	11
11.1 mm	.4370	11.1
7/16	.4375	11.11
11.2 mm	.4409	11.2
11.3 mm	.4449	11.3
11.4 mm	.4488	11.4
11.5 mm	.4528	11.5
29/64	.4531	11.51
11.6 mm	.4567	11.6
11.7 mm	.4606	11.7
11.8 mm	.4646	11.8
11.9 mm	.4685	11.9
15/32	.4688	11.91
12 mm	.4724	12
12.1 mm	.4764	12.1
12.2 mm	.4803	12.2
12.3 mm	.4843	12.3
31/64	.4844	12.3
12.4 mm	.4882	12.4
12.5 mm	.4921	12.5
12.6 mm	.4961	12.6
1/2	.5000	12.7
12.7 mm	.5000	12.7
12.8 mm	.5039	12.8
12.9 mm	.5079	12.9
13 mm	.5118	13
33/64	.5156	13.1
17/32	.5313	13.5
13.5 mm	.5315	13.5
35/64	.5469	13.89
14 mm	.5512	14
9/16	.5625	14.29
14.5 mm	.5709	14.5
37/64	.5781	14.68
15 mm	.5906	15
19/32	.5938	15.08
39/64	.6094	15.48
15.5 mm	.6102	15.5
5/8	.6250	15.88
16 mm	.6299	16
41/64	.6406	16.27
16.5 mm	.6496	16.5
21/32	.6563	16.67
17 mm	.6693	17
43/64	.6719	17.07
11/16	.6875	17.46
17.5 mm	.6890	17.5
45/64	.7031	17.86
18 mm	.7087	18
23/32	.7188	18.26
18.5 mm	.7283	18.5
47/64	.7344	18.65
19 mm	.7480	19
3/4	.7500	19.05
49/64	.7656	19.45
19.5 mm	.7677	19.5
25/32	.7813	19.85
20 mm	.7874	20
51/64	.7969	20.24
20.5 mm	.8071	20.5
13/16	.8125	20.64
21 mm	.8268	21
53/64	.8281	21.03
27/32	.8438	21.43
21.5 mm	.8465	21.5
55/64	.8594	21.83
22 mm	.8661	22
7/8	.8750	22.22
22.5 mm	.8858	22.5
57/64	.8906	22.62
23 mm	.9055	23
29/32	.9063	23.02
59/64	.9219	23.42
23.5 mm	.9252	23.5
15/16	.9375	23.81
24 mm	.9449	24
61/64	.9531	24.21
24.5 mm	.9646	24.5
31/32	.9688	24.61
25 mm	.9843	25
63/64	.9844	25
1	1.0000	25.4
1-1/64	1.0156	25.8
1-1/32	1.0313	26.2

Chart

SP-DB-01

Standard

ASME B94.11M

Rev

A · Oct 2026

Checked

2 references · sources

Number drills (#80 smallest to #1) and letter drills (A to Z) fill the gaps between fractional sizes. E is exactly 1/4″.

Thread Pitch Chart & Thread Identifier SP-TP-01

SP-TP-01

Thread Pitch Chart & Thread Identifier

SizePlate

Best match

1/4-20 UNC

0.0030″ under nominal: normal for a used bolt.

1/4-20 tap drill, wrench and key sizes →

Unified inch (UNC / UNF)

Size	Major diameter		Threads per inch
Size	in	mm	UNC (coarse)	UNF (fine)
#0	.0600	1.52	—	80
#1	.0730	1.85	64	72
#2	.0860	2.18	56	64
#3	.0990	2.51	48	56
#4	.1120	2.84	40	48
#5	.1250	3.17	40	44
#6	.1380	3.51	32	40
#8	.1640	4.17	32	36
#10	.1900	4.83	24	32
#12	.2160	5.49	24	28
1/4″	.2500	6.35	20	28
5/16″	.3125	7.94	18	24
3/8″	.3750	9.52	16	24
7/16″	.4375	11.11	14	20
1/2″	.5000	12.7	13	20
9/16″	.5625	14.29	12	18
5/8″	.6250	15.88	11	18
3/4″	.7500	19.05	10	16
7/8″	.8750	22.22	9	14
1″	1.0000	25.4	8	12

ISO metric

Size	Pitch (mm)		Tap drill (coarse)
Size	Coarse	Fine	Tap drill (coarse)
M1.6	0.35	—	1.25 mm
M2	0.4	—	1.6 mm
M2.5	0.45	—	2.05 mm
M3	0.5	0.35	2.5 mm
M4	0.7	0.5	3.3 mm
M5	0.8	0.5	4.2 mm
M6	1	0.75	5 mm
M8	1.25	1	6.8 mm
M10	1.5	1.25 · 1	8.5 mm
M12	1.75	1.5 · 1.25	10.2 mm
M14	2	1.5	12 mm
M16	2	1.5	14 mm
M20	2.5	1.5	17.5 mm
M24	3	2	21 mm

Chart

SP-TP-01

Standard

ASME B1.1 · ISO 261

Rev

A · Oct 2026

Checked

2 references · sources

A pitch gauge reads threads per inch on inch bolts and the distance between crests on metric ones. 20 TPI is 1.27 mm, which isn't a standard metric pitch, so the two rarely get confused once you have a gauge on it.

Bolt & Socket Size Chart SP-BS-01

SP-BS-01

Bolt & Socket Size Chart

SizePlate

3/8″ hex bolt · wrench / socket

9/16″

14.29 mm

No metric socket fits well

Hex nut: 9/16″
Cap screw key: 5/16″
Button head key: 7/32″
Threads: 3/8-16 · 3/8-24

SAE (inch)

Bolt	Wrench / socket		Hex key
Bolt	Hex bolt	Hex nut	Socket cap	Button head	Flat head
#4	—	1/4″	3/32″	1/16″	1/16″
#6	—	5/16″	7/64″	5/64″	5/64″
#8	—	11/32″	9/64″	3/32″	3/32″
#10	—	3/8″	5/32″	1/8″	1/8″
1/4″	7/16″	7/16″	3/16″	5/32″	5/32″
5/16″	1/2″	1/2″	1/4″	3/16″	3/16″
3/8″	9/16″	9/16″	5/16″	7/32″	7/32″
7/16″	5/8″	11/16″	3/8″	—	1/4″
1/2″	3/4″	3/4″	3/8″	5/16″	5/16″
9/16″	13/16″	7/8″	—	—	—
5/8″	15/16″	15/16″	1/2″	3/8″	3/8″
3/4″	1-1/8″	1-1/8″	5/8″	—	1/2″
7/8″	1-5/16″	1-5/16″	3/4″	—	—
1″	1-1/2″	1-1/2″	3/4″	—	—

Metric (mm)

Bolt	Hex head wrench		Hex key
Bolt	ISO 4017	DIN 933	Socket cap	Button head	Flat head
M3	5.5	5.5	2.5	2	2
M4	7	7	3	2.5	2.5
M5	8	8	4	3	3
M6	10	10	5	4	4
M8	13	13	6	5	5
M10	16	17	8	6	6
M12	18	19	10	8	8
M14	21	22	12	—	—
M16	24	24	14	10	10
M20	30	30	17	—	—
M24	36	36	19	—	—

Chart

SP-BS-01

Standard

ASME B18.2.1 · B18.3 · ISO 4017

Rev

A · Oct 2026

Checked

2 references · sources

M10, M12 and M14 head sizes changed when ISO 4017 replaced DIN 933. Older and imported hardware often uses the DIN size, so check both when a wrench doesn't fit. A dash means no standard size.

Resistor Color Code Calculator SP-RC-01

SP-RC-01

Resistor Color Code Calculator

SizePlate

Yellow · Violet · Red · Gold

4.7 kΩ

±5%

tolerance

Range: 4.465 kΩ – 4.935 kΩ
Standard value: Yes · E12
Exact: 4,700 Ω

Color code chart

Color	Digit	Multiplier	Tolerance
Black	0	×1	—
Brown	1	×10	±1%
Red	2	×100	±2%
Orange	3	×1k	—
Yellow	4	×10k	—
Green	5	×100k	±0.5%
Blue	6	×1M	±0.25%
Violet	7	×10M	±0.1%
Grey	8	×100M	±0.05%
White	9	×1G	—
Gold	—	×0.1	±5%
Silver	—	×0.01	±10%

Standard values (E12 and E24)

Series	Values (× any power of ten)
E12 · ±10%	1	1.2	1.5	1.8	2.2	2.7	3.3	3.9	4.7	5.6	6.8	8.2
E24 · ±5%	1	1.1	1.2	1.3	1.5	1.6	1.8	2	2.2	2.4	2.7	3
	3.3	3.6	3.9	4.3	4.7	5.1	5.6	6.2	6.8	7.5	8.2	9.1

Chart

SP-RC-01

Standard

IEC 60062 · IEC 60063

Rev

A · Oct 2026

Checked

2 references · sources

Read from the end with the band nearest a lead; the tolerance band, often gold or silver, sits apart at the other end. On a 6-band resistor, read the first five as a 5-band; the sixth is the temperature coefficient and doesn't change the value. Color names are printed next to every swatch, since several bands are hard to tell apart by color alone.

SMD Resistor Code Calculator SP-SR-01

SP-SR-01

SMD Resistor Code Calculator

SizePlate

Code 472 · 3-digit

4.7 kΩ

47 × 10²

two figures, then the number of zeros

Exact: 4,700 Ω
Standard value: Yes · E12
Color bands: Yellow · Violet · Red

EIA-96 codes

Code	Value	Code	Value	Code	Value	Code	Value
01	100	25	178	49	316	73	562
02	102	26	182	50	324	74	576
03	105	27	187	51	332	75	590
04	107	28	191	52	340	76	604
05	110	29	196	53	348	77	619
06	113	30	200	54	357	78	634
07	115	31	205	55	365	79	649
08	118	32	210	56	374	80	665
09	121	33	215	57	383	81	681
10	124	34	221	58	392	82	698
11	127	35	226	59	402	83	715
12	130	36	232	60	412	84	732
13	133	37	237	61	422	85	750
14	137	38	243	62	432	86	768
15	140	39	249	63	442	87	787
16	143	40	255	64	453	88	806
17	147	41	261	65	464	89	825
18	150	42	267	66	475	90	845
19	154	43	274	67	487	91	866
20	158	44	280	68	499	92	887
21	162	45	287	69	511	93	909
22	165	46	294	70	523	94	931
23	169	47	301	71	536	95	953
24	174	48	309	72	549	96	976

EIA-96 multiplier letters

Letter	A	B	C	D	E	F	H	R	S	X	Y	Z
×	1	10	100	1k	10k	100k	10	0.01	0.1	0.1	0.01	0.001

Chart

SP-SR-01

Standard

IEC 60062 · EIA-96

Rev

A · Oct 2026

Checked

2 references · sources

0402 and smaller parts are usually unmarked. A bare "0" or "000" is a zero-ohm jumper.

Code	Value	Code	Value	Code	Value	Code	Value
01	100	25	178	49	316	73	562
02	102	26	182	50	324	74	576
03	105	27	187	51	332	75	590
04	107	28	191	52	340	76	604
05	110	29	196	53	348	77	619
06	113	30	200	54	357	78	634
07	115	31	205	55	365	79	649
08	118	32	210	56	374	80	665
09	121	33	215	57	383	81	681
10	124	34	221	58	392	82	698
11	127	35	226	59	402	83	715
12	130	36	232	60	412	84	732
13	133	37	237	61	422	85	750
14	137	38	243	62	432	86	768
15	140	39	249	63	442	87	787
16	143	40	255	64	453	88	806
17	147	41	261	65	464	89	825
18	150	42	267	66	475	90	845
19	154	43	274	67	487	91	866
20	158	44	280	68	499	92	887
21	162	45	287	69	511	93	909
22	165	46	294	70	523	94	931
23	169	47	301	71	536	95	953
24	174	48	309	72	549	96	976

Code	Value	Code	Value	Code	Value	Code	Value
01	100	25	178	49	316	73	562
02	102	26	182	50	324	74	576
03	105	27	187	51	332	75	590
04	107	28	191	52	340	76	604
05	110	29	196	53	348	77	619
06	113	30	200	54	357	78	634
07	115	31	205	55	365	79	649
08	118	32	210	56	374	80	665
09	121	33	215	57	383	81	681
10	124	34	221	58	392	82	698
11	127	35	226	59	402	83	715
12	130	36	232	60	412	84	732
13	133	37	237	61	422	85	750
14	137	38	243	62	432	86	768
15	140	39	249	63	442	87	787
16	143	40	255	64	453	88	806
17	147	41	261	65	464	89	825
18	150	42	267	66	475	90	845
19	154	43	274	67	487	91	866
20	158	44	280	68	499	92	887
21	162	45	287	69	511	93	909
22	165	46	294	70	523	94	931
23	169	47	301	71	536	95	953
24	174	48	309	72	549	96	976

The Shop Wall Set

Tap Drill & Clearance Chart SP-TD-01

Unified inch (UNC / UNF)

ISO metric

Drill Bit Size Chart SP-DB-01

Thread Pitch Chart & Thread Identifier SP-TP-01

Identify a thread

Unified inch (UNC / UNF)

ISO metric

Bolt & Socket Size Chart SP-BS-01

SAE (inch)

Metric (mm)

Resistor Color Code Calculator SP-RC-01

Color code chart

Standard values (E12 and E24)

SMD Resistor Code Calculator SP-SR-01

EIA-96 codes

EIA-96 multiplier letters

Code	Value	Code	Value	Code	Value	Code	Value
01	100	25	178	49	316	73	562
02	102	26	182	50	324	74	576
03	105	27	187	51	332	75	590
04	107	28	191	52	340	76	604
05	110	29	196	53	348	77	619
06	113	30	200	54	357	78	634
07	115	31	205	55	365	79	649
08	118	32	210	56	374	80	665
09	121	33	215	57	383	81	681
10	124	34	221	58	392	82	698
11	127	35	226	59	402	83	715
12	130	36	232	60	412	84	732
13	133	37	237	61	422	85	750
14	137	38	243	62	432	86	768
15	140	39	249	63	442	87	787
16	143	40	255	64	453	88	806
17	147	41	261	65	464	89	825
18	150	42	267	66	475	90	845
19	154	43	274	67	487	91	866
20	158	44	280	68	499	92	887
21	162	45	287	69	511	93	909
22	165	46	294	70	523	94	931
23	169	47	301	71	536	95	953
24	174	48	309	72	549	96	976