DRILL SIZE CHART
	FRACTION	DECIMAL	NUMBER	METRIC	Notes
	(in.)	(in.)	LETTER	(mm)
		.0098		0.25
		.0118		0.30
		.0135	80
		.0138		0.35
		.0145	79
	1/64	.0156
		.0157		0.40
		.0160	78
		.0177		0.45
		.0180	77
		.0197		0.50
		.0200	76
		.0210	75
		.0217		0.55
		.0225	74
		.0236		0.60
		.0240	73
		.0250	72
		.0256		0.65
		.0260	71
		.0276		0.70
		.0280	70
		.0292	69
		.0295		0.75
		.0310	68
	1/32	.0313
		.0315		0.80
		.0320	67
		.0330	66
		.0335		0.85
		.0350	65
		.0354		0.90
		.0360	64
		.0370	63
		.0374		0.95
		.0380	62
		.0390	61
		.0394		1.00
		.0400	60
		.0410	59
		.0420	58
		.0430	57
		.0433		1.10
		.0465	56
	3/64	.0469
		.0472		1.20
		.0512		1.30
		.0520	55
		.0550	54
		.0551		1.40
		.0591		1.50
		.0595	53
	1/16	.0625			Common holes for safety wire
		.0630		1.60
		.0635	52
		.0669		1.70
		.0670	51
		.0700	50
		.0709		1.80
		.0730	49
		.0748		1.90
		.0760	48
	5/64	.0781
		.0785	47
		.0787		2.00
		.0810	46
		.0820	45
		.0827		2.10
		.0860	44
		.0866		2.20
		.0890	43
		.0906		2.30
		.0935	42
	3/32	.0938			Pilot holes before reaming to #40
		.0945		2.40
		.0960	41
		.0980	40		3/32" rivet
		.0984		2.50
		.0995	39
		.1015	38
		.1024		2.60
		.1040	37
		.1063		2.70
		.1065	36
	7/64	.1094
		.1100	35
		.1102		2.80
		.1110	34
		.1130	33
		.1142		2.90
		.1160	32		#4 screw close hole
		.1181		3.00
		.1200	31
	1/8	.1250			Pilot holes before reaming to #30
		.1285	30		1/8" rivet
		.1360	29
		.1378		3.50
		.1405	28
	9/64	.1406
		.1440	27		#6 screw close hole
		.1470	26
		.1495	25
		.1520	24
		.1540	23
	5/32	.1563			Pilot holes before reaming to #21
		.1570	22
		.1575		4.00
		.1590	21		5/32" rivet
		.1610	20
		.1660	19		#8 screw close hole
		.1695	18
	11/64	.1719
		.1730	17
		.1770	16
		.1772		4.50
		.1800	15
		.1820	14
		.1850	13
	3/16	.1875			Pilot holes before reaming to #12 or #10
		.1890	12		3/16" rivet and close hole for #10-32 bolts
		.1910	11
		.1935	10		Holes for 3/16" bolts in UHMW plastic
		.1960	9		#10-24 bolt close hole
		.1968		5.00
		.1990	8
		.2010	7
	13/64	.2031
		.2040	6
		.2055	5
		.2090	4
		.2130	3
		.2165		5.50
	7/32	.2188
		.2210	2
		.2280	1
		.2340	A
	15/64	.2344
		.2362		6.00
		.2380	B
		.2420	C
		.2460	D
	1/4	.2500	E
		.2559		6.50
		.2570	F		1/4-28 bolt close hole
		.2610	G
	17/64	.2656
		.2660	H
		.2720	I
		.2756		7.00
		.2770	J
		.2810	K
	9/32	.2813
		.2900	L
		.2950	M
		.2953		7.50
	19/64	.2969
		.3020	N
	5/16	.3125
		.3150		8.00
		.3160	O
		.3230	P		5/16 bolt close hole
	21/64	.3281
		.3320	Q
		.3346		8.50
		.3390	R
	11/32	.3438
		.3480	S
		.3543		9.00
		.3580	T
	23/64	.3594
		.3680	U
		.3740		9.50
	3/8	.3750
		.3770	V
		.3860	W
	25/64	.3906
		.3937		10.00
		.3970	X
		.4040	Y
	13/32	.4063
		.4130	Z
		.4134		10.50
	27/64	.4219
		.4331		11.00
	7/16	.4375
		.4528		11.50
	29/64	.4531
	15/32	.4688
		.4724		12.00
	31/64	.4844
		.4921		12.50
	1/2	.5000
		.5118		13.00
	33/64	.5156
	17/32	.5313
		.5315		13.50
	35/64	.5469
		.5512		14.00
	9/16	.5625
		.5709		14.50
	37/64	.5781
		.5905		15.00
	19/32	.5938
	39/64	.6094
		.6102		15.50
	5/8	.6250
		.6299		16.00
	41/64	.6406
		.6496		16.50
	21/32	.6563
		.6693		17.00
	43/64	.6719
	11/16	.6875
		.6890		17.50
	45/64	.7031
		.7087		18.00
	23/32	.7188
		.7283		18.50
	47/64	.7344
		.7480		19.00
	3/4	.7500
	49/64	.7656
		.7677		19.50
	25/32	.7813
		.7874		20.00
	51/64	.7969
		.8071		20.50
	13/16	.8125
		.8268		21.00
	53/64	.8281
	27/32	.8438
		.8465		21.50
	55/64	.8594
		.8661		22.00
	7/8	.8750
		.8858		22.50
	57/64	.8906
		.9055		23.00
	29/32	.9063
	59/64	.9219
		.9252		23.50
	15/16	.9375
		.9449		24.00
	61/64	.9531
		.9646		24.50
	31/32	.9688
		.9842		25.00
	63/64	.9844
	1	1.0000
	end