UnoClean Conversion Tables - Standard Drill Sizes

Standard Drill Sizes

All Standard Drill Size Bushings Are indicated in Red

Drill	Decimal	Drill	Decimal	Drill	Decimal	Drill	Decimal	Drill	Decimal
80	.0135"	70	.0280"	60	.0400"	51	.0670"	3/32	.0938"
79	.0145"	69	.0292"	59	.0410"	50	.0700"	41	.0960"
1/64	.0156"	68	.0310"	58	.0420"	49	.0730"	40	.0980"
78	.0160"	1/32	.0313"	57	.0430"	48	.0760"	39	.0995"
77	.0180"	67	.0320"	56	.0465"	5/64	.0781"	38	.1015"
76	.0200"	66	.0330"	3/64	.0469"	47	.0785"	37	.1040"
75	.0210"	65	.0350"	55	.0520"	46	.0810"	36	.1065"
74	.0225"	64	.0360"	54	.0550"	45	.0820"	7/64	.1094"
73	.0240"	63	.0370"	53	.0595"	44	.0860"	35	.1100"
72	.0250"	62	.0380"	1/16	.0625"	43	.0890"	34	.1110"
71	.0260"	61	.0390"	52	.0635"	42	.0935"	33	.1130"

Drill

Decimal

Drill

Decimal

Drill

Decimal

Drill

Decimal

Drill

Decimal

.1160"

.1540"

.1820"

.2055"

.2500"

.1200"

5/32

.1562"

.1850"

.2090"

1/4

.2500"

1/8

.1250"

.1570"

3/16

.1875"

.2130"

.2570"

.1285"

.1590"

.1890"

7/32

.2188"

.2610"

.1360"

.1610"

.1910"

.2210"

17/64

.2656"

.1405"

.1660"

.1935"

.2280"

.2660"

9/64

.1406"

.1695"

.1960"

.2340"

.2720"

.1440"

11/64

.1719"

.1990"

15/64

.2344"

.2770"

.1470"

.1730"

.2010"

.2380"

.2810"

.1495"

.1770"

13/64

.2031"

.2420"

9/32

.2812"

.1520"

.1800"

.2040"

.2460"

.2900"

Drill

Decimal

Drill

Decimal

Drill

Decimal

Drill

Decimal

Drill

Decimal

.2950"

23/64

.3594"

29/64

.4531"

41/64

.6406"

53/64

.8281"

19/64

.2969"

.3680"

15/32

.4688"

21/32

.6562"

27/32

.8438"

.3020"

3/8

.3750"

31/64

.4844"

43/64

.6719"

55/64

.8594"

5/16

.3125"

.3770"

1/2

.5000"

11/16

.6875"

7/8

.8750"

.3160"

.3860"

33/64

.5156"

45/64

.7031"

57/64

.8906"

.3230"

25/64

.3906"

17/32

.5313"

23/32

.7188"

29/32

.9062"

21/64

.3281"

.3970"

35/64

.5469"

47/64

.7344"

59/64

.9219"

.3320"

.4040"

9/16

.5625"

3/4

.7500"

15/16

.9375"

.3390"

13/32

.4062"

37/64

.5781"

49/64

.7656"

61/64

.9531"

11/32

.3438"

.4130

19/32

.5938"

25/32

.7812"

31/32

.9688"

.3480"

27/64

.4219"

39/64

.6094"

51/64

.7969"

63/64

.9844"

.3580"

7/16

.4375"

5/8

.6250"

13/16

.8125"

1.000"

Thread Size/ Tap Drill Size
*Indicates Size of drill to be used before tapping

American Standard Thread		ISO Metric Thread
Thread Size	Tap Drill Size (in.)*	Thread Size	Tap Drill Size(mm)*
0-80	3/64	M1 x 0.25	0.75
1-64	53	M1.1 x 0.25	0.85
1-72	53	M1.2 x 0.25	0.95
2-56	51	M1.4 x 0.3	1.10
2-64	50	M1.6 x 0.35	1.25
3-48	5/64	M1.8 x 0.35	1.45
3-56	46	M2 x 0.4	1.60
4-40	43	M2.2 x 0.45	1.75
4-48	42	M2.5 x 0.45	2.05
5-40	39	M3 x 0.5	2.50

American Standard Thread		ISO Metric Thread
Thread Size	Tap Drill Size (in.)*	Thread Size	Tap Drill Size(mm)*
5-44	37	M3.5 x 0.6	2.90
6-32	36	M4 x 0.7	3.30
6-40	33	M4.5 x 0.75	3.70
8-32	29	M5 x 0.8	4.20
8-36	29	M6 x 1	5.00
10-24	25	M7 x 1	6.00
10-32	21	M8 x 1.25	6.80
12-24	17	M9 x 1.25	7.80
12-28	15	M10 x 1.5	8.50
1/4-20	7	M11 x 1.5	9.50

American Standard Thread		ISO Metric Thread
Thread Size	Tap Drill Size (in.)*	Thread Size	Tap Drill Size(mm)*
1/4-28	3	M12 x 1.75	10.20
5/16-18	F	M14 x 2	12.00
5/16-24	I	M16 x 2	14.00
3/8-16	5/16	M18 x 2.5	15.50
3/8-24	Q	M20 x 2.5	17.50
7/16-14	U	M22 x 2.5	19.50
7/16-20	W	M24 x 3	21.00
1/2-13	27/64	M27 x 3	24.00
1/2-20	29/64	M30 x 3.5	26.50
9/16-12	31/64	M33 x 3.5	29.50

American Standard Thread		ISO Metric Thread
Thread Size	Tap Drill Size (in.)*	Thread Size	Tap Drill Size(mm)*
9/16-18	33/64	M36 x 4	32.00
5/8-11	17/32	M39 x 4	35.00
5/8-18	37/64	M42 x 4.5	37.50
3/4-10	21/32	M45 x 4.5	40.50
3/4-16	11/16	M48 x 5	43.00
7/8-9	49/64	M52 x 5	47.00
7/8-14	13/16	M56 x 5.5	50.50
1"-8	7/8	M60 x 5.5	54.50
1"-14	15/18	M64 x 6	58.00
		M68 x 6	62.00

TERMS

Coupon Code copied

Standard Drill Sizes