Starrett Inch/Metric Tap Drill Sizes & Decimal Equivalents

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INCH/METRIC TAP DRILL SIZES & DECIMAL EQUIVALENTS

		IIU IAI	DINLL	UI		Q DLUI
DRILL SIZE	DECIMAL EQUIVALENT	TAP SIZE	DRILL SIZE		DECIMAL EQUIVALENT	TAP SIZE
90				10
80 79	.0135 .0145			10 9	.1935 .1960
ŕ	.0156			8	.1990
64 78			49	7	.2010	1/4 - 20
77	.0180		13 64		.2031
76			U -T	6	.2040
75 74				5	.2055
74 73				4 3	.2090	1/4 - 28
73 72			7		.2130 .2188	1/4 - 20
71	.0260		32	2	.2210
70	.0280			1	.2280
69	.0292		15	A	.2340
1 68			15 64		.2344
32	.0312			В	.2380
67 66	.0320			C	.2420
65			1	D E-	.2460 .2500
64	.0360		4	F	.2570	⁵ /16 - 18
63			47	G	.2610	/10 10
62			17 64		.2656
61	.0390		U .	H	.2660
60	.0400				.2720	⁵ /16 - 24
59 58	.0410 .0420			J K	.2770
57	.0430		9		.2810 .2812
EC.			32	L	.2900
64	.0469	0 - 80	40	M	.2950
33			19 64		.2969
54		4 04 70	5	N	.3020
1 53		1 - 64, 72	16		.3125	³ /8 - 16
16 52	0625 .0635			O P	.3160
51	.0670		21 64	P	.3230 .3281
50	.0700	2 - 56, 64	64	Q	.3320	³ /8 - 24
49	.0730	Í	11	Ř	.3390	, , , , , , ,
5 48			11 32		.3438
5 64	.0781	2 40	52	S	.3480
47 46	.0785 .0810	3 - 48	23	Т	.3580
45		3 - 56	23 64	U	.3594	⁷ /16 - 14
44			3		.3680 .3750	1/16 - 14
43		4 - 40	8	V	.3770
3 42		4 - 48	25	W	.3860
3 42	.0938		25 64		.3906	⁷ /16 - 20
41			•	X	.3970
40 39	.0980 .0995		13	Y	.4040
40 39 38 37 36	.1015	5 - 40	13 32	Z	.4062 .4130
37	.1040	5 - 44	27 7		.4219	1/2 - 13
7 36		6 - 32			.4375	/2 10
64	.1094		29 16 64 15		.4531	¹ /2 - 20
35 34	.1100 .1110		31 32		.4688
33	.1130	6 - 40	64 1		.4844	⁹ /16 - 12
33 32	.1160	0 - 40	33 2		.5000	0,4
31	.1200		33 2 64 17		.5156	⁹ /16 - 18
8 20	.1250		35 32		.5312	⁵ /8 - 11
30	.1285	0 00 00	64 9		.5469 .5625
29 28	.1360	8 - 32, 36	37 16 64 19		.5781	⁵ /8 - 18
9 64 27	.1405 .1406		64 19		.5938	, 5
21	.1440		39 32 64 5		.6094
26	.1470				.6250
25	.1495	10 - 24	41 8 64 21 _		.6406	21 10
24 23	.1520				.6562	³ /4 - 10
5 23			43 32 64 11		.6719	³ /4 - 16
5 32 22	.1562 .1570		45 16 64 23		. 6875 .7031	74 - 10
21	.1590	10 - 32			.7188
20	.1610		47 32 64 3		.7344
19	.1660				.7500
11 18			49 4 64 25		.7656	⁷ /8 - 9
11 10 10 10 10 10 10 10 10 10 10 10 10 1	.1719				.7812
17 16	.1730 .1770	12 24			.7969	71- 44
15		12 - 24			.8125 8281	⁷ /8 - 14
14	.1820	12 - 28	53 16 64 27		.8281 .8438
₂ 13			55 32 64 7		.8594
3	.1875				.8750	1 - 8
12	.1890		57 64 20		.8906
11	.1910		57 8 64 29 32		.9062

DRILL SIZE	DECIMAL EQUIVALENT	TAP SIZE
59 64 61 64 31 63 32 64 1 1 ³ / ₆₄ 1 ⁷ / ₆₄ 1 ¹ / ₈ 1 ¹ / ₈ 1 ¹ / ₄ 1 ¹ / ₃₂ 1 ³ / ₈ 1 ²⁷ / ₆₄ 1 ¹ / ₂	.9219 .9375 .9531 .9688 .9844 1.0000 1.0469 1.1094 1.1250 1.1719 1.2188 1.2500 1.2969 1.3438 1.3750 1.4219 1.5000	1 - 12 1 - 14 $1^{1}/8 - 7$ $1^{1}/8 - 12$ $1^{1}/4 - 7$ $1^{1}/4 - 12$ $1^{3}/8 - 6$ $1^{3}/8 - 12$ $1^{1}/2 - 6$ $1^{1}/2 - 12$

METRIC TAP DRILL SIZES METRIC TAP TAP DRILL (mm) DECIMAL (inch) M1.6 x 0.35 1.25 .0492 M1.8 x 0.35 1.45 .0571 M2 x 0.4 1.60 .0630 M2.2 x 0.45 1.75 .0689 M2.5 x 0.45 2.05 .0807 M3 x 0.5 2.50 .0984 M3.5 x 0.6 2.90 .1142 M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M39 x 3 36.00 1.4173	1 / 2
METRIC TAP TAP DRILL (mm) DECIMAL (inch) M1.6 x 0.35 1.25 .0492 M1.8 x 0.35 1.45 .0571 M2 x 0.4 1.60 .0630 M2.2 x 0.45 1.75 .0689 M2.5 x 0.45 2.05 .0807 M3 x 0.5 2.50 .0984 M3.5 x 0.6 2.90 .1142 M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 <
M1.6 x 0.35 1.25 .0492 M1.8 x 0.35 1.45 .0571 M2 x 0.4 1.60 .0630 M2.2 x 0.45 1.75 .0689 M2.5 x 0.45 2.05 .0807 M3 x 0.5 2.50 .0984 M3.5 x 0.6 2.90 .1142 M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.50 .5709 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M22 x 2.5 19.50 .7677	METRIC	C TAP DRILL SIZ	ZES
M1.8 x 0.35 1.45 .0571 M2 x 0.4 1.60 .0630 M2.2 x 0.45 1.75 .0689 M2.5 x 0.45 2.05 .0807 M3 x 0.5 2.50 .0984 M3.5 x 0.6 2.90 .1142 M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.5 8.50 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8061	METRIC TAP	TAP DRILL (mm)	DECIMAL (Inch)
M2 x 0.4 1.60 .0630 M2.2 x 0.45 1.75 .0689 M2.5 x 0.45 2.05 .0807 M3 x 0.5 2.50 .0984 M3.5 x 0.6 2.90 .1142 M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M22 x 2.5 19.50 .7677	$M1.6 \times 0.35$	1.25	.0492
M2.2 x 0.45 1.75 .0689 M2.5 x 0.45 2.05 .0807 M3 x 0.5 2.50 .0984 M3.5 x 0.6 2.90 .1142 M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M18 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6496 M20 x 2.5 17.50 .6890 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661	$M1.8 \times 0.35$	1.45	.0571
M2.2 x 0.45 1.75 .0689 M2.5 x 0.45 2.05 .0807 M3 x 0.5 2.50 .0984 M3.5 x 0.6 2.90 .1142 M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M18 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6496 M20 x 2.5 17.50 .6890 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661	$M2 \times 0.4$	1.60	.0630
M2.5 x 0.45 2.05 .0807 M3 x 0.5 2.50 .0984 M3.5 x 0.6 2.90 .1142 M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 2.5 17.50 .6890 M22 x 1.5 20.50 .8661 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449	$M2.2 \times 0.45$
M3 x 0.5 2.50 .0984 M3.5 x 0.6 2.90 .1142 M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 <	111212 11 01 10
M3.5 x 0.6 2.90 .1142 M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 <
M4 x 0.7 3.30 .1299 M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8061 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 2 28.00 1.1614	1110 11 010
M4.5 x 0.75 3.70 .1457 M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433			—
M5 x 0.8 4.20 .1654 M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 2.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 1.0433 M30 x 3.5 26.50 1.0433	M4 x 0.7	3.30	.1299
M6 x 1 5.00 .1968 M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 2 31.00 1.2598 <	$M4.5 \times 0.75$	3.70	.1457
M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 2 31.00 1.2598 M36 x 4 32.00 1.2598	$M5 \times 0.8$	4.20	.1654
M7 x 1 6.00 .2362 M8 x 1.25 6.70 .2638 M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 2 31.00 1.2598 M36 x 4 32.00 1.2598	M6 x 1	5.00	.1968
M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6890 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 2 25.00 .9449 M27 x 2 25.00 1.0433 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2598 M36 x 4 32.00 1.2598<	M7 x 1
M8 x 1 7.00 .2756 M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2598 M36 x 4 32.00 1.2598 M39 x 4 35.00 1.3780
M10 x 1.5 8.50 .3346 M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2598 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.259
M10 x 1.25 8.70 .3425 M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2598 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.378
M12 x 1.75 10.20 .4016 M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2598 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M12 x 1.25 10.80 .4252 M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2598 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780	M10 x 1.25	8.70	.3425
M14 x 2 12.00 .4724 M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780	M12 x 1.75	10.20	.4016
M14 x 1.5 12.50 .4921 M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780	M12 x 1.25	10.80	.4252
M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780	M14 x 2	12.00	.4724
M16 x 2 14.00 .5512 M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780	M14 x 1.5	12.50	.4921
M16 x 1.5 14.50 .5709 M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2598 M36 x 4 32.00 1.2598 M39 x 4 35.00 1.3780	M16 v 2	14 00	5512
M18 x 2.5 15.50 .6102 M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2598 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M18 x 1.5 16.50 .6496 M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M20 x 2.5 17.50 .6890 M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M20 x 1.5 18.50 .7283 M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M22 x 2.5 19.50 .7677 M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780		17.50	.6890
M22 x 1.5 20.50 .8071 M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780	M20 x 1.5		.7283
M24 x 3 21.00 .8268 M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780	M22 x 2.5	19.50	.7677
M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780	M22 x 1.5	20.50	.8071
M24 x 2 22.00 .8661 M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780	M24 x 3	21.00	-8268
M27 x 3 24.00 .9449 M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M27 x 2 25.00 .9843 M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M30 x 3.5 26.50 1.0433 M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M30 x 2 28.00 1.1024 M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M33 x 3.5 29.50 1.1614 M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M33 x 2 31.00 1.2205 M36 x 4 32.00 1.2598 M36 x 3 33.00 1.2992 M39 x 4 35.00 1.3780
M36 x 4 M36 x 3 M39 x 4 32.00 33.00 1.2992 35.00 1.3780
M36 x 3 M39 x 4 33.00 1.2992 1.3780	M33 x 2	31.00	1.2205
M36 x 3 M39 x 4 33.00 1.2992 1.3780	M36 x 4	32.00	1.2598
M39 x 4 35.00 1.3780

11100 A 0 00100 11T170

PIPE THREAD SIZES (NPSC)
THREAD	DRILL	THREAD	DRILL
¹ /8 – 27	11/32	$1^{1/2} - 11^{1/2}$	1 ³ / ₄
¹ /4 – 18	⁷ /16	2 - 11 ¹ / ₂	2 ⁷ /32
³ /8 – 18	37/64	$2^{1/2} - 8$	2 ²¹ / ₃₂
¹ /2 – 14	23/32	3 – 8	31/4
³ /4 – 14	59/64	$3^{1/2} - 8$	33/4
$1 - 11^{1/2}$	1 ⁵ /32	4 – 8	41/4
$1^{1/4} - 11^{1/2}$	11/2

Bulletin 1214-5M/S 05/10 starrett.com