Metric Threads

The charts below gives the dimensions for Metric Coarse Thread and Metric Fine Threads.

The size of a metric fastener (screw, bolt, etc.) is generally specified as diameter, pitch and length, all in millimeters (mm). Metric fasteners are usually classified as either coarse or fine, referring to their thread pitch, although some sizes are available in an extra fine thread. Coarse is the most common metric thread and is assumed when pitch isn't specified.

Dimensions shown are in mm, if you wish to convert to Inches, please use our universal converter.

METRIC COARSE THREAD CHART

Angle of thread sides is 60 degrees.

Nom Diameter (D) Size	Thread		Bolt Diameters
Nom Diameter (D) Size	Major Dia (D)	Pitch	Minor Dia Male THD (d3)	Minor Dia Female THD (D1)	Pitch Diameter (d2=D2)	Thread Height Male THD (h3)	Thread Height Female THD (H1)	Root Radius (r)	Tapping Drill Size
M1.0	1.00	0.25	0.693	0.729	0.838	0.153	0.135	0.036	0.75
M1.1	1.10	0.25	0.793	0.829	0.938	0.153	0.135	0.036	0.85
M1.2	1.20	0.25	0.893	0.929	1.038	0.153	0.135	0.036	0.95
M1.4	1.40	0.3	1.032	1.075	1.205	0.184	0.162	0.043	1.10
M1.6	1.60	0.35	1.171	1.221	1.373	0.215	0.189	0.051	1.25
M1.8	1.80	0.35	1.371	1.421	1.573	0.215	0.189	0.051	1.45
M2	2.00	0.40	1.509	1.567	1.740	0.245	0.217	0.058	1.60
M2.2	2.20	0.45	1.648	1.713	1.908	0.276	0.244	0.065	1.75
M2.5	2.50	0.45	1.948	2.013	2.208	0.276	0.244	0.065	2.05
M3	3.00	0.50	2.387	2.459	2.675	0.307	0.271	0.072	2.50
M3.5	3.50	0.60	2.764	2.850	3.110	0.368	0.325	0.087	2.90
M4	4.00	0.70	3.141	3.242	3.545	0.429	0.379	0.101	3.30
M4.5	4.50	0.75	3.580	3.688	4.013	0.460	0.406	0.108	3.80
M5	5.00	0.80	4.019	4.134	4.480	0.491	0.433	0.115	4.20
M6	6.00	1.00	4.773	4.917	5.350	0.613	0.541	0.144	5.00
M7	7.00	1.00	5.773	5.917	6.350	0.613	0.541	0.144	6.00
M8	8.00	1.25	6.466	6.647	7.188	0.767	0.677	0.18	6.80
M9	9.00	1.25	7.466	7.647	8.188	0.767	0.677	0.18	7.80
M10	10.00	1.50	8.160	8.376	9.026	0.920	0.812	0.217	8.50
M11	11.00	1.50	9.160	9.376	10.026	0.920	0.812	0.217	9.50
M12	12.00	1.75	9.853	10.106	10.863	1.074	0.947	0.253	10.20
M14	14.00	2.00	11.546	11.835	12.701	1.227	1.083	0.289	12.00
M16	16.00	2.00	13.546	13.835	14.701	1.227	1.083	0.289	14.00
M18	18.00	2.50	14.933	15.394	16.376	1.534	1.353	0.361	15.50
M20	20.00	2.50	16.933	17.294	18.376	1.534	1.353	0.361	17.50
M22	22.00	2.50	18.933	19.294	20.376	1.534	1.353	0.361	19.50
M24	24.00	3.00	20.319	20.752	22.051	1.840	1.624	0.433	21.00
M27	27.00	3.00	23.319	23.752	25.051	1.840	1.624	0.433	24.00
M30	30.00	3.50	25.706	26.211	27.727	2.147	1.894	0.505	26.50
M33	33.00	3.50	28.706	29.211	30.727	2.147	1.894	0.505	29.50
M36	36.00	4.00	31.093	31.670	33.402	2.454	2.165	0.577	32.00
M39	39.00	4.00	34.093	34.670	36.402	2.454	2.165	0.577	35.00
M42	42.00	4.50	36.479	37.129	39.077	2.760	2.436	0.65	37.50
M45	45.00	4.50	39.479	40.129	42.077	2.760	2.436	0.65	40.50
M48	48.00	5.00	41.866	42.857	44.752	3.067	2.706	0.722	43.00
M52	52.00	5.00	45.866	46.587	48.752	3.067	2.706	0.722	47.00
M56	56.00	5.50	49.252	50.046	52.428	3.374	2.977	0.794	50.50
M60	60.00	5.50	53.252	24.046	56.428	3.374	2.977	0.794	54.50
M64	64.00	6.00	56.639	57.505	60.103	3.681	3.248	0.866	58.00
M68	68.00	6.00	60.639	61.505	64.103	3.681	3.248	0.866	62.00

METRIC FINE THREAD CHART

Angle of thread sides is 60 degrees.

Nom Diameter (D) Size	Thread		Bolt Diameters
Nom Diameter (D) Size	Major Dia (D)	Pitch	Minor Dia Male THD (d3)	Minor Dia Female THD (D1)	Pitch Diameter (d2=D2)	Thread Height Male THD (h3)	Thread Height Female THD (H1)	Root Radius (r)	Tapping Drill Size
M1.0x0.2	1.00	0.2	0.755	0.783	0.870	0.123	0.108	0.029	0.80
M1.1x0.2	1.10	0.2	0.755	0.783	0.870	0.123	0.108	0.029	0.80
M1.2x0.2	1.20	0.2	0.955	0.983	1.070	0.123	0.108	0.029	1.00
M1.4x0.2	1.40	0.2	1.155	1.183	1.270	0.123	0.108	0.029	1.20
M1.6x0.2	1.60	0.20	1.355	1.383	1.470	0.123	0.108	0.029	1.40
M1.8x0.2	1.80	0.20	1.555	1.583	1.670	0.123	0.108	0.029	1.60
M2x0.25	2.00	0.25	1.693	1.729	1.838	0.153	0.135	0.036	1.75
M2.2x0.25	2.20	0.25	1.893	1.929	2.038	0.153	0.135	0.036	1.95
M2.5x0.35	2.50	0.35	2.071	2.121	2.273	0.215	0.189	0.051	2.15
M3x0.35	3.00	0.35	2.571	2.621	2.773	0.215	0.189	0.051	2.65
M3.5x0.35	3.50	0.35	3.071	3.121	3.273	0.215	0.189	0.051	3.15
M4x0.5	4.00	0.50	3.387	3.459	3.675	0.307	0.271	0.072	3.50
M4.5x0.5	4.50	0.50	3.887	3.959	4.175	0.307	0.271	0.072	4.00
M5x0.5	5.00	0.50	4.387	4.459	4.675	0.307	0.271	0.072	4.50
M5.5x0.5	5.50	0.50	4.887	4.959	5.175	0.307	0.271	0.072	5.00
M6x0.75	6.00	0.75	5.080	5.188	5.513	0.460	0.406	0.108	5.25
M7x0.75	7.00	0.75	6.080	6.188	6.513	0.460	0.406	0.108	6.25
M8x0.75	8.00	0.75	7.080	7.188	7.513	0.460	0.406	0.108	7.25
M8x1.0	8.00	1.00	6.773	6.917	7.350	0.613	0.541	0.144	7.00
M9x1.0	9.00	1.00	8.080	8.188	8.513	0.460	0.406	0.108	8.25
M9x1.0	9.00	1.00	7.773	7.917	8.350	0.613	0.541	0.144	8.00
M10x0.75	10.00	0.75	9.080	9.188	9.513	0.460	0.406	0.108	9.25
M10x1.0	10.00	1.00	8.773	8.917	9.350	0.613	0.541	0.144	9.00
M10x1.25	10.00	1.25	8.466	8.647	9.188	0.767	0.677	0.180	8.75
M11x0.75	11.00	0.75	10.080	10.188	10.513	0.460	0.406	0.108	10.25
M11x1	11.00	1.00	9.773	9.917	10.350	0.613	0.541	0.144	10.00
M12x1	12.00	1.00	10.773	10.917	11.350	0.613	0.541	0.144	11.00
M12x1.25	12.00	1.25	10.466	10.647	11.188	0.767	0.677	0.217	10.50
M12x1.5	12.00	1.50	10.160	10.376	11.026	0.920	0.812	0.144	10.50
M14X1.0	14.00	1.00	12.773	12.917	13.350	0.613	0.541	0.144	13.00
M14x1.25	14.00	1.25	12.466	12.647	13.188	0.767	0.677	0.217	12.75
M14x1.5	14.00	1.50	12.160	12.376	13.026	0.920	0.812	0.217	12.50
M15x1.0	15.00	1.00	13.773	13.917	14.350	0.613	0.541	0.144	14.00
M15x1.5	15.00	1.50	13.160	13.376	14.026	0.920	0.812	0.217	13.50
M16x1	16.00	1.00	14.773	14.917	15.350	0.613	0.541	0.144	15.00
M16x1.5	16.00	1.50	14.160	14.376	15.026	0.920	0.812	0.217	14.50
M17x1.0	17.00	1.00	15.773	15.917	16.350	0.613	0.541	0.144	16.00
M17x1.5	17.00	1.50	15.160	15.376	16.026	0.920	0.812	0.217	15.50
M18x1.0	18.00	1.00	16.773	16.917	17.350	0.613	0.541	0.144	17.00
M18x1.5	18.00	1.50	16.160	16.376	17.026	0.920	0.812	0.217	16.50
M18x2.0	18.00	2.00	15.546	15.835	16.701	1.227	1.083	0.289	16.00
M20x1.0	20.00	1.00	18.773	18.917	19.350	0.613	0.541	0.144	19.00
M20x1.5	20.00	1.50	18.160	18.376	19.026	0.920	0.812	0.217	18.50
M20x2.0	20.00	2.00	17.546	17.835	19.351	1.227	1.083	0.289	18.00
M22x1.0	22.00	1.00	20.773	20.917	21.350	0.613	0.541	0.144	20.50
M22x1.5	22.00	1.50	20.160	20.376	21.026	0.920	0.812	0.217	20.50
M22x2.0	22.00	2.00	19.546	19.835	20.701	1.227	1.083	0.289	20.00
M24x1.0	24.00	1.00	22.773	22.917	23.026	0.613	0.541	0.144	23.00
M24x1.5	24.00	1.50	22.160	22.376	23.026	0.920	0.812	0.217	22.50
M24x2.0	24.00	2.00	21.546	21.835	22.701	1.227	1.083	0.289	22.00
M25x1.0	25.00	1.00	23.773	23.917	24.350	0.613	0.541	0.144	23.50
M25x1.5	25.00	1.50	23.160	23.376	24.026	0.920	0.812	0.217	23.50
M25x2.0	25.00	2.00	22.546	22.917	24.350	1.227	1.083	0.289	23.00
M27x1.0	27.00	1.00	25.773	25.917	26.350	0.613	0.541	0.144	26.00
M27x1.5	27.00	1.50	25.160	25.376	26.026	0.920	0.812	0.217	25.50
M27x2.0	27.00	2.00	24.546	24.835	25.701	1.227	1.083	0.289	25.00
M28x1.0	28.00	1.00	26.773	26.917	27.350	0.613	0.541	0.144	27.00
M28x1.5	28.00	1.50	26.160	26.376	27.026	0.920	0.812	0.217	26.50
M28x2.0	28.00	2.00	25.546	25.835	27.701	1.227	1.083	0.289	26.00
M30x1.0	30.00	1.00	28.773	28.917	29.350	0.613	0.541	0.144	29.00
M30x1.5	30.00	1.50	28.160	28.376	29.026	0.920	0.812	0.217	28.50
M30x2.0	30.00	2.00	27.546	27.835	28.701	1.227	1.083	0.289	28.00
M32x1.5	32.00	1.50	30.160	30.376	31.026	0.920	0.812	0.217	30.50
M32x2.0	32.00	2.00	29.546	29.835	31.026	1.227	1.083	0.289	30.00
M33x1.5	33.00	1.50	31.160	31.376	32.026	0.920	0.812	0.217	31.50
M33x2.0	33.00	2.00	30.546	30.835	31.701	1.227	1.083	0.289	31.00
M33x3.0	33.00	3.00	29.319	29.752	31.051	1.840	1.624	0.433	30.00
M35x1.5	35.00	1.50	33.160	33.376	34.026	0.920	0.812	0.217	33.50
M35x2.0	35.00	2.00	32.546	32.835	33.701	1.227	1.083	0.289	33.00
M36x1.5	36.00	1.50	34.160	34.376	35.026	0.920	0.812	0.217	34.00
M36x2.0	36.00	2.00	33.546	33.835	34.701	1.227	1.083	0.289	34.00
M36x3.0	36.00	3.00	32.319	32.752	34.051	1.840	1.624	0.433	33.00
M39x1.5	39.00	1.50	37.160	37.376	38.026	0.920	0.812	0.217	37.50
M39x2.0	39.00	2.00	36.546	36.835	37.701	1.227	1.083	0.289	37.00
M39x3.0	39.00	3.00	35.319	35.752	37.051	1.840	1.624	0.433	36.00
M40x1.5	40.00	1.50	38.160	38.376	39.026	0.920	0.812	0.217	38.50
M40x2.0	40.00	2.00	37.546	37.835	38.701	1.227	1.083	0.289	38.00
M40x3.0	40.00	3.00	36.319	36.752	38.051	1.840	1.624	0.433	37.00
M42x1.5	42.00	1.50	40.160	40.376	41.026	0.920	0.812	0.217	40.50
M42x2.0	42.00	2.00	39.546	39.835	40.701	1.227	1.083	0.289	40.00
M42x3.0	42.00	3.00	38.319	38.752	40.051	1.840	1.624	0.433	39.00
M45x1.5	45.00	1.50	43.160	43.376	44.026	0.920	0.812	0.217	43.50
M45x2.0	45.00	2.00	42.546	42.835	43.701	1.227	1.083	0.289	43.00
M45x3.0	45.00	3.00	41.319	41.752	43.051	1.840	1.624	0.433	42.00
M45x4.0	45.00	4.00	40.093	40.670	42.402	2.454	2.165	0.577	41.00
M48x1.5	48.00	1.50	46.160	46.376	47.026	0.920	0.812	0.217	46.50
M48x2.0	48.00	2.00	45.546	45.835	47.026	1.227	1.083	0.289	46.00
M48x3.0	48.00	3.00	44.319	44.752	46.051	1.840	1.624	0.433	45.00
M48x4.0	48.00	4.00	43.093	43.670	45.402	2.454	2.165	0.577	44.00
M50x1.5	50.00	1.50	48.160	48.376	49.026	0.920	0.812	0.217	48.50
M50x2.0	50.00	2.00	47.546	47.835	48.701	1.227	1.083	0.289	48.00
M50x3.0	50.00	3.00	46.319	46.752	48.051	1.840	1.624	0.433	47.00
M52x1.5	52.00	1.50	50.160	50.376	51.026	0.920	0.812	0.217	50.50
M52x2.0	52.00	2.00	49.546	49.835	50.701	1.227	1.083	0.289	50.00
M52x3.0	52.00	3.00	48.319	48.752	50.051	1.840	1.624	0.433	49.00
M52x4.0	52.00	4.00	47.093	47.670	49.402	2.454	2.165	0.577	48.00
M55x1.5	55.00	1.50	53.160	53.376	54.026	0.920	0.812	0.217	53.50
M55x2.0	55.00	2.00	52.546	52.835	53.701	1.227	1.083	0.289	53.00
M55x3.0	55.00	3.00	51.319	51.752	53.051	1.840	1.624	0.433	52.00
M55x4.0	55.00	4.00	50.093	50.670	52.402	2.454	2.165	0.577	51.00
M56x1.5	56.00	1.50	54.160	54.376	55.026	0.920	0.812	0.217	54.50
M56x2.0	56.00	2.00	53.546	53.835	54.701	1.227	1.083	0.289	54.00
M56x3.0	56.00	3.00	52.319	52.752	54.051	1.840	1.624	0.433	53.00
M56x4.0	56.00	4.00	51.093	51.670	53.402	2.454	2.165	0.577	52.00
M58x1.5	58.00	1.50	56.160	56.376	57.026	0.920	0.812	0.217	56.50
M58x2.0	58.00	2.00	55.546	55.835	56.701	1.227	1.083	0.289	56.00
M58x3.0	58.00	3.00	54.319	54.752	56.051	1.840	1.624	0.433	55.00
M58x4.0	58.00	4.00	53.093	53.670	55.402	2.454	2.165	0.577	54.00
M60x1.5	60.00	1.50	58.160	58.376	59.026	0.920	0.812	0.217	58.50
M60x2.0	60.00	2.00	57.546	57.835	58.701	1.227	1.083	0.289	58.00
M60x3.0	60.00	3.00	56.319	56.752	58.051	1.840	1.624	0.433	57.00
M60x4.0	60.00	4.00	55.093	55.670	57.402	2.454	2.165	0.577	56.00
M62x1.5	62.00	1.50	60.160	60.376	61.026	0.920	0.812	0.217	60.50
M62x2.0	62.00	2.00	59.546	59.835	60.701	1.227	1.083	0.289	60.00
M62x3.0	62.00	3.00	58.319	58.752	60.051	1.840	1.624	0.433	59.00
M62x4.0	62.00	4.00	57.093	57.670	59.402	2.454	2.165	0.577	58.00
M64x1.5	64.00	1.50	62.160	62.376	63.026	0.920	0.812	0.217	62.50
M64x2.0	64.00	2.00	61.546	61.835	62.701	1.227	1.083	0.289	62.00
M64x3.0	64.00	3.00	60.319	60.752	62.051	1.840	1.624	0.433	61.00
M64x4.0	64.00	4.00	59.093	59.670	61.402	2.454	2.165	0.577	60.00
M65x1.5	65.00	1.50	63.160	63.376	64.026	0.920	0.812	0.217	63.50
M65x2.0	65.00	2.00	62.546	62.835	63.701	1.227	1.083	0.289	63.00
M65x3.0	65.00	3.00	61.319	61.752	63.051	1.840	1.624	0.433	62.00
M65x4.0	65.00	4.00	60.093	60.670	62.402	2.454	2.165	0.577	61.00
M68x1.5	68.00	1.50	66.160	66.376	67.026	0.920	0.812	0.217	66.50
M68x2.0	68.00	2.00	65.546	65.835	66.701	1.227	1.083	0.289	66.00
M68x3.0	68.00	3.00	64.319	64.752	66.051	1.840	1.624	0.433	65.00
M68x4.0	68.00	4.00	63.093	63.670	65.402	2.454	2.165	0.577	64.00
M70x1.5	70.00	1.50	68.160	68.376	69.026	0.920	0.812	0.217	68.50
M70x2.0	70.00	2.00	67.546	67.835	68.701	1.227	1.083	0.289	68.00
M70x3.0	70.00	3.00	66.319	66.752	68.051	1.840	1.624	0.433	67.00
M70x4.0	70.00	4.00	65.093	65.670	67.402	2.454	2.165	0.577	66.00
M72x1.5	72.00	1.50	70.160	70.376	71.026	0.920	0.812	0.217	70.50
M72x2.0	72.00	2.00	69.546	69.835	70.701	1.227	1.083	0.289	70.00
M72x3.0	72.00	3.00	68.319	68.752	70.051	1.840	1.624	0.433	69.00
M72x4.0	72.00	4.00	64.639	65.505	66.103	3.681	3.248	0.866	66.00
M75x1.5	75.00	1.50	73.160	73.376	74.026	0.920	0.812	0.217	73.50
M75x2.0	75.00	2.00	72.546	72.835	73.701	1.227	1.083	0.289	73.00
M75x3.0	75.00	3.00	71.319	71.752	73.051	1.840	1.624	0.433	72.00
M75x4.0	75.00	4.00	70.093	70.670	72.402	2.454	2.165	0.577	71.00
M75x6.0	75.00	6.00	67.639	68.505	71.103	3.681	3.248	0.866	69.00
M76x1.5	76.00	1.50	74.160	74.376	75.026	0.920	0.812	0.217	74.50
M76x2.0	76.00	2.00	73.546	73.835	74.701	1.227	1.083	0.289	74.00
M76x3.0	76.00	3.00	72.319	72.752	74.051	1.840	1.624	0.433	73.00
M76x6.0	76.00	6.00	68.639	69.505	72.103	3.681	3.248	0.866	70.00
M80x1.5	80.00	1.50	78.160	78.376	79.026	0.920	0.812	0.217	78.50
M80x2.0	80.00	2.00	77.546	77.835	78.701	1.227	1.083	0.289	78.00
M80x3.0	80.00	3.00	76.319	76.752	78.051	1.840	1.624	0.433	77.00
M80x4.0	80.00	4.00	75.093	75.670	77.402	2.454	2.165	0.577	76.00
M80x6.0	80.00	6.00	72.639	73.505	76.103	3.681	3.248	0.866	74.00
M85x2.0	85.00	2.00	82.546	82.835	83.701	1.227	1.083	0.289	83.00
M85x3.0	85.00	3.00	81.319	81.752	83.051	1.840	1.624	0.433	82.00
M85x4.0	85.00	4.00	80.093	80.670	82.402	2.454	2.165	0.577	81.00
M85x6.0	85.00	6.00	77.639	78.505	81.103	3.681	3.248	0.866	79.00
M90x2.0	90.00	2.00	87.546	87.835	88.701	1.227	1.083	0.289	88.00
M90x3.0	90.00	3.00	86.319	86.752	88.051	1.840	1.624	0.433	87.00
M90x4.0	90.00	4.00	85.093	85.670	87.402	2.454	2.165	0.577	86.00
M90x6.0	90.00	6.00	82.639	83.505	86.103	3.681	3.248	0.866	84.00
M95x2.0	95.00	2.00	92.546	92.835	93.701	1.227	1.083	0.289	93.00
M95x3.0	95.00	3.00	91.319	91.752	93.051	1.840	1.624	0.433	92.00
M95x4.0	95.00	4.00	90.093	90.670	92.402	2.454	2.165	0.577	91.00
M95x6.0	95.00	6.00	87.639	88.505	92.103	3.681	3.248	0.866	89.00
M100x2.0	100.00	2.00	97.546	97.835	98.701	1.227	1.083	0.289	98.00
M100x3.0	100.00	3.00	96.319	96.752	98.051	1.840	1.624	0.433	97.00
M100x4.0	100.00	4.00	95.093	95.670	97.402	2.454	2.165	0.577	94.00
M100x6.0	100.00	6.00	92.639	93.505	96.103	3.681	3.248	0.866	94.00

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