Internal Metric Thread and Fastener Sizes M50

Internal Metric Thread Table Chart Fastener Sizes M52 - M72

ISO Metric Hardware Engineering Data
Fastener and Screw / Bolt Design, Formula and Calculations

The following table chart are standard metric internal thread sizes M 52 - M 72 per. ANSI/ASME B1.13M-1995. These thread sizes and classes represent bolts and screws, as well, as other standard internal threads. Do not use these values for standard metric external thread design. All units in mm.

Metric Internal and External threads

Where:

H = P ( 3^1/2 / 2 ) = 0.866025 P
or
0.125H = 0.108253P

ISO Metric Thread Designation	Pitch	Metric Internal Threads Specification Table
		Tolerance Class	Minor Dia		Pitch Dia		Major Dia		Tap Drill
		Tolerance Class	Min	Max	Min	Max	Min	Max	Basic
M52x5	5	6H	46.587	47.297	48.752	49.067	52.000	53.037	47.000
M52x4	4	6H	47.670	48.270	49.402	49.717	52.000	52.892	48.000
M52x3	3	6H	48.752	49.252	50.051	50.331	52.000	52.713	49.000
M52x2	2	6H	49.835	50.210	50.701	50.937	52.000	52.525	50.000
M52x1.5	1.5	6H	50.376	50.676	51.026	51.238	52.000	52.429	50.500
M55x4	4	6H	50.670	51.270	52.402	52.717	55.000	55.892	51.000
M55x3	3	6H	51.752	52.252	53.051	53.331	55.000	55.713	52.000
M55x2	2	6H	52.835	53.210	53.701	53.937	55.000	55.525	53.000
M55x1.5	1.5	6H	53.376	53.676	54.026	54.238	55.000	55.428	53.500
M56x6.5	6.5	6H	48.964	49.814	51.778	52.178	56.000	57.338	49.500
M56x5.5	5.5	6H	50.046	50.796	52.428	52.783	56.000	57.149	50.500
M56x4	4	6H	51.670	52.270	53.402	53.717	56.000	56.892	52.000
M56x3	3	6H	52.752	53.252	54.051	54.331	56.000	56.713	53.000
M56x2	2	6H	53.835	54.210	54.701	54.937	56.000	56.525	54.000
M56x1.5	1.5	6H	54.376	54.676	55.026	55.238	56.000	56.429	54.500
M56x1	1	6H	54.917	55.153	55.350	55.540	56.000	56.334	55.000
M58x4	4	6H	53.670	54.270	55.402	55.717	58.000	58.892	54.000
M58x3	3	6H	54.752	55.252	56.051	56.331	58.000	58.713	55.000
M58x2	2	6H	55.835	56.210	56.701	56.937	58.000	58.525	56.000
M58x1.5	1.5	6H	56.376	56.676	57.026	57.238	58.000	58.429	56.500
M60x5.5	5.5	6H	54.046	54.796	56.428	56.783	60.000	61.149	54.500
M60x4	4	6H	55.670	56.270	57.402	57.717	60.000	60.892	54.000
M60x3	3	6H	56.752	57.252	58.051	58.331	60.000	60.713	57.000
M60x2	2	6H	57.835	58.210	58.701	58.937	60.000	60.525	58.000
M60x1.5	1.5	6H	58.376	58.676	59.026	59.238	60.000	60.428	58.500
M60x1	1	6H	58.917	59.153	59.350	59.540	60.000	60.334	59.000
M62x4	4	6H	57.670	58.270	59.402	59.717	62.000	62.892	58.000
M62x3	3	6H	58.752	59.252	60.051	60.331	62.000	62.713	59.000
M62x2	2	6H	59.835	60.210	60.701	60.937	62.000	62.525	60.000
M62x1.5	1.5	6H	60.376	60.676	61.026	61.238	62.000	62.429	60.500
M63x1.5	1.5	6H	61.376	61.676	62.026	62.238	63.000	63.429	61.500
M64x6	6	6H	57.505	58.305	60.103	60.478	64.000	65.241	58.000
M64x5.5	5.5	6H	58.046	58.796	60.428	60.783	64.000	65.149	58.500
M64x4	4	6H	59.670	60.270	61.402	61.717	64.000	64.892	60.000
M64x3	3	6H	60.752	61.252	62.051	62.331	64.000	64.713	61.000
M64x2	2	6H	61.835	62.210	62.701	62.937	64.000	64.525	62.000
M64x1.5	1.5	6H	62.376	62.676	63.026	63.238	64.000	64.429	62.500
M64x1	1	6H	62.917	63.153	63.350	63.540	64.000	64.334	63.000
M65x4	4	6H	60.670	61.270	62.402	62.717	65.000	65.892	61.000
M65x3	3	6H	61.752	62.252	63.051	63.331	65.000	65.713	62.000
M65x2	2	6H	62.835	63.210	63.701	63.937	65.000	65.525	63.000
M65x1.5	1.5	6H	63.376	63.676	64.026	64.238	65.000	65.428	63.500
M68x6	6	6H	61.505	62.305	64.103	64.478	68.000	69.241	62.000
M68x4	4	6H	63.670	64.270	65.402	65.717	68.000	68.892	64.000
M68x3	3	6H	64.752	65.252	66.051	66.331	68.000	68.713	65.000
M68x2	2	6H	65.835	66.210	66.701	66.937	68.000	68.525	66.000
M68x1.5	1.5	6H	66.376	66.676	67.026	67.238	68.000	68.429	66.500
M68x1	1	6H	66.917	67.153	67.350	67.540	68.000	68.334	67.000
M70x6	6	6H	63.505	64.305	66.103	66.478	70.000	71.241	64.000
M70x4	4	6H	65.670	66.270	67.402	67.717	70.000	70.892	66.000
M70x3	3	6H	66.752	67.252	68.051	68.331	70.000	70.713	67.000
M70x2	2	6H	67.835	68.210	68.701	68.937	70.000	70.525	68.000
M70x1.5	1.5	6H	68.376	68.676	69.026	69.238	70.000	70.428	68.500
M72x6	6	6H	65.505	66.305	68.103	68.478	72.000	73.241	66.000
M72x4	4	6H	67.670	68.270	69.402	69.717	72.000	72.892	68.000
M72x3	3	6H	68.752	69.252	70.051	70.331	72.000	72.713	69.000
M72x2	2	6H	69.835	70.210	70.701	70.937	72.000	72.525	70.000
M72x1.5	1.5	6H	70.376	70.676	71.026	71.238	72.000	72.429	70.500
M72x1	1	6H	70.917	71.153	71.350	71.540	72.000	72.334	71.000

ANSI Inch Unit Hardware Design Guide
Length of Screw Thread Engagement per. ISO 965-1 Calculator, Formula and Table Length of engagement of mating threads is selected to utilize full tensile strength of a bolt prior to shearing and nut threads.
Standard Internal Metric Thread and Fastener Sizes M 0.25 - M 8
Internal Metric Thread and Fastener Sizes M 9 - M 24
Internal Metric Thread and Fastener Sizes M 24 - M 50
Internal Metric Thread and Fastener Sizes M75 - M120
Internal Metric Thread and Fastener Sizes M125 - M180
Internal Metric Thread and Fastener Sizes M185 - M230
Internal Metric Thread and Fastener Sizes M235 - M600