Auxiliary Systems Tap Drill Chart

Machinist Tap / Drill Chart

For Printable Machinist Tap Drill Chart PDF File Click Here!



	ANSI Standard Machinist American Screw Thread Tap / Drill Size Chart
	Screw Size NC			Screw Size Fine
	TAP SIZE	DRILL SIZE		TAP SIZE	DRILL SIZE
	#0-80	3/64"		#1-72	#53
	#1-64	#53		#2-64	#50
	#2-56	#51		#3-56	#46
	#3-48	5/64"		#4-48	#42
	#4-40	#43		#5-44	#37
	#5-40	#39		#6-40	#33
	#6-32	#36		#8-36	#29
	#8-32	#29		#10-32	#21
	#10-24	#25		#12-28	#15
	#12-24	#17		1/4-28	#3
	1/4-20	#7		5/16-24	I
	5/16-18	F		3/8-24	Q
	3/8-16	5/16		7/16-20	W
	7/16-14	U		1/2-20	29/64
	1/2-13	27/64		9/16-18	33/64
	9/16-12	31/64		5/8-18	37/64
	5/8-11	17/32		3/4-16	11/16
	3/4-10	21/32		7/8-14	13/16
	7/8-9	49/64		1"-12	15/16
	1"-8	7/8		1-1/8-12	1-3/64
	1-1/8-7	63/64		1-1/4-12	1-11/64
	1-1/4-7	1-7/64		1-1/2-12	1-27/64
	1-1/2-6	1-11/32		1-3/4-12	1-43/64
	1-3/4-5	1-35/64		2"-12	1-59/64
	2"-4-1/2	1-25/32


	Machinist Metric Screw Thread Tap / Drill Size Chart
	METRIC SCREW COARSE SIZES			METRIC SCREW FINE SIZES
	TAP SIZE	DRILL SIZE		TAP SIZE	DRILL SIZE
	1mm x .25	75mm		4 mm x .35	3.6mm
	1.1 x .25	0.85		4 x .5	3.5
	1.2 x .25	0.95		5 x .5	4.5
	1.4 x .3	1.1		6 x .5	5.5
	1.6 x .35	1.25		6 x .75	5.25
	1.7 x .35	1.3		7 x .75	6.25
	1.8 x .35	1.45		8 x .5	7.5
	2 x .4	1.6		8 x .75	7.25
	2.2 x .45	1.75		8 x 1	7
	2.5 x .45	2.05		9 x 1	8
	3 x .5	2.5		10 x .75	9.25
	3.5 x .6	2.9		10 x 1	9
	4 x .7	3.3		10 x 1.25	8.8
	4.5 x .75	3.7		11 x 1	10
	5 x .8	4.2		12 x .75	11.25
	6 x 1	5		12 x 1	11
	7 x 1	6		12 x 1.5	10.5
	8 x 1.25	6.8		14 x 1	13
	9 x 1.25	7.8		14 x 1.25	12.8
	10 x 1.5	8.5		14 x 1.5	12.5
	11 x 1.5	9.5		16 x 1	15
	12 x 1.75	10.2		16 x 1.5	14.5
	14 x 2	12		18 x 1	17
	16 x 2	14		18 x 2	16
	18 x 2.5	15.5		20 x 1	19
	20 x 2.5	17.5		20 x 1.5	18.5
	22 x 2.5	19.5		20 x 2	18
	24 x 3	21		22 x 1	21
	27 x 3	24		22 x 1.5	20.5
30 x 3.5	26.5	22 x 2		20
33 x 3.5	29.5	24 x 1.5		22.5
36 x 4	32	24 x 2		22
39 x 4	35	26 x 1.5		24.5
		27 x 1.5		25.5
		27 x 2		25
		28 x 1.5		26.5
		30 x 1.5		28.5
		30 x 2		28
		33 x 2		31
		36 x 3		33
		39 x 3		36


Machinist Pipe Thread Tap / Drill Size Chart
TAPER PIPE SIZES - NPT			STRAIGHT PIPE SIZES - NPS
TAP SIZE	DRILL SIZE		TAP SIZE	DRILL SIZE

1/8-27	R		1/8-27	S
1/4-18	7/16		1/4-18	29/64
3/8-18	37/64		3/8-18	19/32
1/2-14	23/32		1/2-14	47/64
3/4-14	59/64		3/4-14	15/16
1"-11-1/2	1-5/32		1"-11-1/2	1-3/16
1-1/4-11-1/2	1-1/2		1-1/4-11-1/2	1-33/64
1-1/2-11-1/2	1-47/64		1-1/2-11-1/2	1-3/4
2"-11-1/2	2-7/32		2"-11-1/2	2-7/32
2-1/2-8	2-5/8		2-1/2-8	2-21/32
3"-8	3-1/4		3"-8	3-9/32
3-1/2-8	3-3/4		3-1/2-8	3-25/32
4"-8	4-1/4		4"-8	4-9/32

Auxiliary Systems Inc

Saturday, May 19, 2012

Machinist Tap / Drill Chart