METRIC THREAD - Drill & Tap Chart (ISO)

Fine Thread Sizes

Tap (Thread) Size	Drill Size(mm)
M4 x 0.35	3.60
M4 x 0.5	3.50
M5 x 0.5	4.50
M6 x .5	5.50
M6 x .75	5.25
M7 x .75	6.25
M8 x .5	7.00
M8 x .75	7.25
M8 x 1	7.50
M9 x 1	8.00
M10 x 0.75	9.25
M10 x 1	9.0
M10 x 1.25	8.8
M11 x 1	10.0
M12 x .75	11.25
M12 x 1	11.0
M12 x 1.5	10.5
M14 x 1	13.0
M14 x 1.25	12.8
M14 x 1.5	12.5
M16 x 1	15.0
M16 x 1.5	15.0
M18 x 1	17.0
M18 x 2	16.0
M20 x 1	19.0
M20 x 1.5	18.5
M20 x 2	18.0
M22 x 1	21.0
M22 x 1.5	20.5
M22 x 2	20.0
M24 x 1.5	22.5
M24 x 2	22.0
M26 x 1.5	24.5
M27 x 1.5	25.5
M27 x 2	25.0
M28 x 1.5	26.5
M30 x 1.5	28.5
M30 x 2	28.0
M33 x 2	31.0
M36 x 3	36.0

Course Thread Sizes

Tap (Thread) Size	Drill Size(mm)
M1 x 0.25	0.75
M1.1 x 0.25	0.85
M1.2 x 0.25	0.95
M1.4 x 0.3	1.10
M1.6 x 0.35	1.25
M1.8 x 0.35	1.45
M2 x 0.4	1.60
M2.2 x 0.45	1.75
M2.5 x 0.45	2.05
M3 x 0.5	2.50
M3.5 x 0.6	2.90
M4 x 0.7	3.30
M4.5 x 0.75	3.70
M5 x 0.8	4.20
M6 x 1	5.00
M7 x 1	6.00
M8 x 1.25	6.80
M9 x 1.25	7.80
M10 x 1.5	8.50
M11 x 1.5	9.50
M12 x 1.75	10.20
M14 x 2	12.00
M16 x 2	14.00
M18 x 2.5	15.50
M20 x 2.5	17.50
M22 x 2.5	19.50
M24 x 3	21.00
M27 x 3	24.00
M30 x 3.5	26.50
M33 x 3.5	29.50
M36 x 4	32.00
M39 x 4	35.00
M42 x 4.5	37.50
M45 x 4.5	40.50
M48 x 5	43.00
M52 x 5	47.00
M56 x 5.5	50.50
M60 x 5.5	54.50
M64 x 6	58.00
M68 x 6	62.00

Tap (Thread) Size - Nominal Dia x Pitch [p] in mm

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Imperial Tap Drill Chart
Machine Screw Size		Number of Threads Per Inch	Minor Dia.	Tap Drills				Clearance Hole Drills
				Aluminum, Brass & Plastics 75% Thread		Stainless Steel, Steels & Iron 50% Thread		All Materials
								Close Fit		Free Fit
No. or Dia.	Major Dia.			Drill Size	Decimal Equiv.	Drill Size	Decimal Equiv.	Drill Size	Decimal Equiv.	Drill Size	Decimal Equiv.
0	.0600	80	.0447	3/64	.0469	55	.0520	52	.0635	50	.0700
1	.0730	64	.0538	53	.0595	1/16	.0625	48	.0760	46	.0810
		72	.0560	53	.0595	52	.0635
2	.0860	56	.0641	50	.0700	49	.0730	43	.0890	41	.0960
		64	.0668	50	.0700	48	.0760
3	.0990	48	.0734	47	.0785	44	.0860	37	.1040	35	.1100
		56	.0771	45	.0820	43	.0890
4	.1120	40	.0813	43	.0890	41	.0960	32	.1160	30	.1285
		48	.0864	42	.0935	40	.0980
5	.1250	40	.0943	38	.1015	7/64	.1094	30	.1285	29	.1360
		44	.0971	37	.1040	35	.1100
6	.1380	32	.0997	36	.1065	32	.1160	27	.1440	25	.1495
		40	.1073	33	.1130	31	.1200
8	.1640	32	.1257	29	.1360	27	.1440	18	.1695	16	.1770
		36	.1299	29	.1360	26	.1470
10	.1900	24	.1389	25	.1495	20	.1610	9	.1960	7	.2010
		32	.1517	21	.1590	18	.1695
12	.2160	24	.1649	16	.1770	12	.1890	2	.2210	1	.2280
		28	.1722	14	.1820	10	.1935
		32	.1777	13	.1850	9	.1960
1/4	.2500	20	.1887	7	.2010	7/32	.2188	F	.2570	H	.2660
		28	.2062	3	.2130	1	.2280
		32	.2117	7/32	.2188	1	.2280
5/16	.3125	18	.2443	F	.2570	J	.2770	P	.3230	Q	.3320
		24	.2614	I	.2720	9/32	.2812
		32	.2742	9/32	.2812	L	.2900
3/8	.3750	16	.2983	5/16	.3125	Q	.3320	W	.3860	X	.3970
		24	.3239	Q	.3320	S	.3480
		32	.3367	11/32	.3438	T	.3580
7/16	.4375	14	.3499	U	.3680	25/64	.3906	29/64	.4531	15/32	.4687
		20	.3762	25/64	.3906	13/32	.4062
		28	.3937	Y	.4040	Z	.4130
1/2	.5000	13	.4056	27/64	.4219	29/64	.4531	33/64	.5156	17/32	.5312
		20	.4387	29/64	.4531	15/32	.4688
		28	.4562	15/32	.4688	15/32	.4688
9/16	.5625	12	.4603	31/64	.4844	33/64	.5156	37/64	.5781	19/32	.5938
		18	.4943	33/64	.5156	17/32	.5312
		24	.5114	33/64	.5156	17/32	.5312
5/8	.6250	11	.5135	17/32	.5312	9/16	.5625	41/64	.6406	21/32	.6562
		18	.5568	37/64	.5781	19/32	.5938
		24	.5739	37/64	.5781	19/32	.5938
11/16	.6875	24	.6364	41/64	.6406	21/32	.6562	45/64	.7031	23/32	.6562
3/4	.7500	10	.6273	21/32	.6562	11/16	.6875	49/64	.7656	25/32	.7812
		16	.6733	11/16	.6875	45/64	.7031
		20	.6887	45/64	.7031	23/32	.7188
13/16	.8125	20	.7512	49/64	.7656	25/32	.7812	53/64	.8281	27/32	.8438
7/8	.8750	9	.7387	49/64	.7656	51/64	.7969	57/64	.8906	29/32	.9062
		14	.7874	13/16	.8125	53/64	.8281
		20	.8137	53/64	.8281	27/32	.8438
15/16	.9375	20	.8762	57/64	.8906	29/32	.9062	61/64	.9531	31/32	.9688
1	1.000	8	.8466	7/8	.8750	59/64	.9219	1-1/64	1.0156	1-1/32	1.0313
		12	.8978	15/16	.9375	61/64	.9531
		20	.9387	61/64	.9531	31/32	.9688
1-1/16	1.0625	18	.9943	1.000	1.000	1-1/64	1.0156	1-5/64	1.0781	1-3/32	1.0938
1-1/8	1.1250	7	.9497	63/64	.9844	1-1/32	1.0313	1-9/64	1.1406	1-5/32	1.1562
		12	1.0228	1-3/64	1.0469	1-5/64	1.0781
		18	1.0568	1-1/16	1.0625	1-5/64	1.0781
1-3/16	1.1875	18	1.1193	1-1/8	1.1250	1-9/64	1.1406	1-13/64	1.2031	1-7/32	1.2188
1-1/4	1.2500	7	1.0747	1-7/64	1.1094	1-5/32	1.1562	1-17/64	1.2656	1-9/32	1.2812
		12	1.1478	1-11/64	1.1719	1-13/64	1.2031
		18	1.1818	1-3/16	1.1875	1-13/64	1.2031
1-5/16	1.3125	18	1.2443	1-1/4	1.2500	1-17/64	1.2656	1-21/64	1.3281	1-11/32	1.3438
1-3/8	1.3750	6	1.1705	1-7/32	1.2187	1-17/64	1.2656	1-25/64	1.3906	1-13/32	1.4062
		12	1.2728	1-19/64	1.2969	1-21/64	1.3281
		18	1.3068	1-5/16	1.3125	1-21/64	1.3281
1-7/16	1.4375	18	1.3693	1-3/8	1.3750	1-25/64	1.3906	1-29/64	1.4531	1-15/32	1.4688
1-1/2	1.500	6	1.2955	1-11/32	1.3437	1-25/64	1.3906	1-33/64	1.5156	1-17/32	1.5312
		12	1.3978	1-27/64	1.4219	1-7/16	1.4375
		18	1.4318	1-7/16	1.4375	1-29/64	1.4531
1-9/16	1.5625	18	1.4943	1-12	1.500	1-33/64	1.5156	1-37/64	1.5781	1-19/32	1.5938
1-5/8	1.625	18	1.5568	1-9/16	1.5625	1-37/64	1.5781	1-41/64	1.6406	1-21/32	1.6562
1-11/16	1.6875	18	1.6193	1-5/8	1.6250	1-41/64	1.6406	1-45/64	1.7031	1-23/32	1.7188
1-3/4	1.750	5	1.5046	1-9/16	1.5625	1-5/8	1.6250	1-49/64	1.7659	1-25/32	1.7812

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Metric Tap Drill Chart
Tap size	Major Dia (mm)	Threads per	Tap Drill (mm)	Tap Drill (inch)	Clearance (mm)	Clearance (inch)
M1.6x0.35	1.6	0.35	1.25	#55	1.8	#49
M2x0.4	2.0	0.40	1.60	#52	2.4	#41
M2.5x0.45	2.5	0.45	2.05	#46	2.9	#32
M3x.05	3.0	0.50	2.50	#39	3.4	#29
M3.5x0.6	3.5	0.60	2.90	#32	3.9	#23
M4x0.7	4.0	0.70	3.30	#30	4.5	#16
M5x0.8	5.0	0.80	4.20	#19	5.5	7/32
M6x1	6.0	1.00	5.0	#8	6.6	G
M8x1.25	8.0	1.25	6.8	H	9.0	T
M8x1	8.0	1.00	7.0	J	9.0	T
M10x1.5	10.0	1.50	8.5>	R	12.0	31/64
M10x1.25	10.0	1.25	8.8	11/32	12.0	31/64
M12x1.75	12.0	1.75	10.2	13/32	14.0	35/64
M12x1.25	12.0	1.25	10.8	27/64	14.0	35/64
M14x2	14.0	2.00	12.0	15/32	16.0	5/8
M14x1.5	14.0	1.5	12.5	1/2	16.0	5/8
M16x2	16.0	2.00	14.0	35/64	18.0	45/64
M16x1.5	16.0	1.50	14.5	37/64	18.0	45/64
M18x2.5	18.0	2.50	15.5	39/64	20.0	51/64
M18x1.5	18.0	1.50	16.5	21/32	20.0	51/64
M20x2.5	20.0	2.50	17.5	11/16	22.0	7/8
M20x1.5	20.0	1.50	18.5	47/64	22.0	7/8
M22x2.5	22.0	2.50	19.5	49/64	25.0	1
M22x1.5	22.0	1.50	20.5	13/16	25.0	1
M24x3	24.0	3.00	21.0	53/64	27.0	1-5/64
M24x2	24.0	2.00	22.0	7/8	27.0	1-5/64
M27x3	27.0	3.00	24.0	15/16	30.0	1-3/16
M27x2	27.0	2.0	25.0	1	30.0	1-3/16

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Pipe Threads
-	American Standard			British Standard
Nominal OD	Threads per inch	NPT	NPS	Threads per inch	Drill size
1/16	27	D	1/4	28	G
1/8	27	R	S	28	11/32
1/4	18	7/16	29/64	19	15/32
3/8	18	37/64	19/32	19	39/64
1/2	14	23/32	47/64	14	3/4
5/8	-	-	-	14	53/64
3/4	14	59/64	15/16	14	31/32
7/8	-	-	-	14	1-7/64
1	11.5	1-5/32	1-3/16	11	1-7/32

Kostal Group of Germany has signed an MOU with NTTF - (Jan 27 2008)

The KOSTAL GROUP which is providing employment to approximately 11,000 people and generated a consolidated turnover of 1.3 Billion Euro with its operations in 26 locations, situated in 14 countries on 4 continents is collaborated with Indian Company NTTF Industries Ltd. to bring unique features in automotive electrical devices.

These features are in the form of Column mounted switches, Power window switches, Steering position sensors instrument, Panel Mounted switches, Pinch Protection Devices, Power Window Regulator etc. which will increase the driving pleasures immensely.

Generally, if any one keeps their hand while closing the car window, the glass will crush the hand. But, with the self sensor devises like Pinch Protection Device and Power Window Regulator etc. the glass will stop to avoid the glass pinch. The Kostal Company is also bringing integrated multiple applications in the steering with Column mounted switches, Steering position sensors instrument, Panel Mounted switches which will enable to control the Up-Down of seats and main lights operations of the car.    

Kostal Group of Germany bringing their technologically advanced electronic & electromechanical (mechatronic) products in Asia for the first time.

NTTFIL (Nettur Technical Training Foundation)  is known for high quality Tooling, Dies, Jigs Fixtures, Moulds, Stamped and Moulded components, and Industrial components, as well as Electrical Switches and Controls for automotive OEM's. NTTF also has a joint venture company with Aisin Seiki Ltd of Japan, for supply of Door Latch, Window Regulator, Hinge assembly, Doorframe, etc. to Toyota's(TKML) Indian Operations. NTTF is a leader in the field of Technical Education, Vocational Training, Company-wide Skill Improvement Training, and Personality Development Programmes. Corporate houses like, TATA's, NOKIA, OEN, KELTRON, MARUTI, TKML(Toyota) and others have partnered with NTTF for their training needs.

The Automotive Industry in India is showing sustaining growth over the last few years and combined with the success of well established Automotive manufactures, newly located OEM transplants and the TATA’s innovative 1 Lakh car has added more to this, further market potential is expected as the overall ekonomy continues to grow strongly.

KOSTAL GROUP and NTTF are agreed upon a Memorandum of Understanding with the intention to have an operational Joint Venture to supply the rapidly growing Indian automotive market by the middle of this year 2008.

Speaking to reporter at the press conference held in the capital the MDs of the both the Kostal Group and NTTF express their pleasure. Mr. Ludger Laufenberg- MD Kostal Group said that they have already supplied 10 million units of Pinch Protection Devices, Power Window Regulator in the world market so far. It will be a great pleasure of us to work with company like NTTF, which is supplying high quality products to the customers in India and abroad.

The intention of the new Joint venture between KOSTAL GROUP and NTTFIL is that, through the synergy of local capabilities & skills and the international competences of KOSTAL GROUP, the joint venture can fully support the increasing demands of the car manufactures and their customers with world class products.