External Metric ISO Thread Table Chart Sizes M56

External Metric ISO Thread Table Chart Sizes M56 - M78

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

The following are metric external thread size table chart for sizes M 56 to M 78 per. ANSI/ASME B1.13M-1995. These thread sizes and classes represent bolts and screws, as well, as other standard external threads. Do not use these values for standard metric internal thread designs. 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	External Threads
		Tolerance Class	Major Dia		Pitch Dia		Minor Dia
		Tolerance Class	Max	Min	Max	Min	Max	Min
M56x6.5	6.5	6g	55.915	55.285	51.693	51.393	48.879	47.389
M56x6.5	6.5	4g6g	55.915	55.285	51.693	51.503	48.879	47.499
M56x5.5	5.5	6g	55.925	55.365	52.353	52.088	49.971	48.700
M56x5.5	5.5	4g6g	55.925	55.365	52.353	52.183	49.971	48.795
M56x4	4	6g	55.940	55.465	53.342	53.106	51.610	50.642
M56x4	4	4g6g	55.940	55.465	53.342	53.192	51.610	50.728
M56x3	3	6g	55.952	55.577	54.003	53.791	52.704	51.943
M56x3	3	4g6g	55.952	55.577	54.003	53.871	52.704	52.023
M56x2	2	6g	55.962	55.682	54.663	54.483	53.797	53.251
M56x2	2	4g6g	55.962	55.682	54.663	54.551	53.797	53.319
M56x1.5	1.5	6g	55.968	55.732	54.994	54.834	54.344	53.910
M56x1.5	1.5	4g6g	55.968	55.732	54.994	54.894	54.344	53.970
M56x1	1	6g	55.974	55.794	55.324	55.184	54.891	54.568
M56x1	1	4g6g	55.974	55.794	55.324	55.234	54.891	54.618
M58x4	4	6g	57.940	57.465	55.342	55.106	53.610	52.642
M58x4	4	4g6g	57.940	57.465	55.342	55.192	53.610	52.728
M58x3	3	6g	57.952	57.577	56.003	55.791	54.704	53.943
M58x3	3	4g6g	57.952	57.577	56.003	55.871	54.704	54.023
M58x2	2	6g	57.962	57.682	56.663	56.483	55.797	55.251
M58x2	2	4g6g	57.962	57.682	56.663	56.551	55.797	55.319
M58x1.5	1.5	6g	57.968	57.732	56.994	56.834	56.344	55.910
M58x1.5	1.5	4g6g	57.968	57.732	56.994	56.894	56.344	55.970
M60x5.5	5.5	6g	59.925	59.365	56.353	56.088	53.971	52.700
M60x5.5	5.5	4g6g	59.925	59.365	56.353	56.183	53.971	52.795
M60x4	4	6g	59.940	59.465	57.342	57.106	55.610	54.642
M60x4	4	4g6g	59.940	59.465	57.342	57.192	55.610	54.728
M60x3	3	6g	59.952	59.577	58.003	57.791	56.704	55.943
M60x3	3	4g6g	59.952	59.577	58.003	57.871	56.704	56.023
M60x2	2	6g	59.962	59.682	58.663	58.483	57.797	57.251
M60x2	2	4g6g	59.962	59.682	58.663	58.551	57.797	57.319
M60x1.5	1.5	6g	59.968	59.732	58.994	58.834	58.344	57.910
M60x1.5	1.5	4g6g	59.968	59.732	58.994	58.894	58.344	57.970
M60x1	1	6g	59.974	59.794	59.324	59.184	58.891	58.568
M60x1	1	4g6g	59.974	59.794	59.324	59.234	58.891	58.618
M62x4	4	6g	61.940	61.465	59.342	59.106	57.610	56.642
M62x4	4	4g6g	61.940	61.465	59.342	59.192	57.610	56.728
M62x3	3	6g	61.952	61.577	60.003	59.791	58.704	57.943
M62x3	3	4g6g	61.952	61.577	60.003	59.871	58.704	58.023
M62x2	2	6g	61.962	61.682	60.663	60.483	59.797	59.251
M62x2	2	4g6g	61.962	61.682	60.663	60.551	59.797	59.319
M62x1.5	1.5	6g	61.968	61.732	60.994	60.834	60.344	59.910
M62x1.5	1.5	4g6g	61.968	61.732	60.994	60.894	60.344	59.970
M63x1.5	1.5	6g	62.968	62.732	61.994	61.834	61.344	60.910
M63x1.5	1.5	4g6g	62.968	62.732	61.994	61.894	61.344	60.970
M64x6	6	6g	63.920	63.320	60.023	59.743	57.425	56.047
M64x6	6	4g6g	63.920	63.320	60.023	59.843	57.425	56.147
M64x5.5	5.5	6g	63.925	63.365	60.353	60.088	57.971	56.700
M64x5.5	5.5	4g6g	63.925	63.365	60.353	60.183	57.971	56.795
M64x4	4	6g	63.940	63.465	61.342	61.106	59.610	58.642
M64x4	4	4g6g	63.940	63.465	61.342	61.192	59.610	58.728
M64x3	3	6g	63.952	63.577	62.003	61.791	60.704	59.943
M64x3	3	4g6g	63.952	63.577	62.003	61.871	60.704	60.023
M64x2	2	6g	63.962	63.682	62.663	62.483	61.797	61.251
M64x2	2	4g6g	63.962	63.682	62.663	62.551	61.797	61.319
M64x1.5	1.5	6g	63.968	63.732	62.994	62.834	62.344	61.910
M64x1.5	1.5	4g6g	63.968	63.732	62.994	62.894	62.344	61.970
M64x1	1	6g	63.974	63.794	63.324	63.184	62.891	62.568
M64x1	1	4g6g	63.974	63.794	63.324	63.234	62.891	62.618
M65x4	4	6g	64.940	64.465	62.342	62.106	60.610	59.642
M65x4	4	4g6g	64.940	64.465	62.342	62.192	60.610	59.728
M65x3	3	6g	64.952	64.577	63.003	62.791	61.704	60.943
M65x3	3	4g6g	64.952	64.577	63.003	62.871	61.704	61.023
M65x2	2	6g	64.962	64.682	63.663	63.483	62.797	62.251
M65x2	2	4g6g	64.962	64.682	63.663	63.551	62.797	62.319
M65x1.5	1.5	6g	64.968	64.732	63.994	63.834	63.344	62.910
M65x1.5	1.5	4g6g	64.968	64.732	63.994	63.894	63.344	62.970
M68x6	6	6g	67.920	67.320	64.023	63.743	61.425	60.047
M68x6	6	4g6g	67.920	67.320	64.023	63.843	61.425	60.147
M68x4	4	6g	67.940	67.465	65.342	65.106	63.610	62.642
M68x4	4	4g6g	67.940	67.465	65.342	65.192	63.610	62.728
M68x3	3	6g	67.952	67.577	66.003	65.791	64.704	63.943
M68x3	3	4g6g	67.952	67.577	66.003	65.871	64.704	64.023
M68x2	2	6g	67.962	67.682	66.663	66.483	65.797	65.251
M68x2	2	4g6g	67.962	67.682	66.663	66.551	65.797	65.319
M68x1.5	1.5	6g	67.968	67.732	66.994	66.834	66.344	65.910
M68x1.5	1.5	4g6g	67.968	67.732	66.994	66.894	66.344	65.970
M68x1	1	6g	67.974	67.794	67.324	67.184	66.891	66.568
M68x1	1	4g6g	67.974	67.794	67.324	67.234	66.891	66.618
M70x6	6	6g	69.920	69.320	66.023	65.743	63.425	62.047
M70x6	6	4g6g	69.920	69.320	66.023	65.843	63.425	62.147
M70x4	4	6g	69.940	69.465	67.342	67.106	65.610	64.642
M70x4	4	4g6g	69.940	69.465	67.342	67.192	65.610	64.728
M70x3	3	6g	69.952	69.577	68.003	67.791	66.704	65.943
M70x3	3	4g6g	69.952	69.577	68.003	67.871	66.704	66.023
M70x2	2	6g	69.962	69.682	68.663	68.483	67.797	67.251
M70x2	2	4g6g	69.962	69.682	68.663	68.551	67.797	67.319
M70x1.5	1.5	6g	69.968	69.732	68.994	68.834	68.344	67.910
M70x1.5	1.5	4g6g	69.968	69.732	68.994	68.894	68.344	67.970
M72x6	6	6g	71.920	71.320	68.023	67.743	65.425	64.047
M72x6	6	4g6g	71.920	71.320	68.023	67.843	65.425	64.147
M72x4	4	6g	71.940	71.465	69.342	69.106	67.610	66.642
M72x4	4	4g6g	71.940	71.465	69.342	69.192	67.610	66.728
M72x3	3	6g	71.952	71.577	70.003	69.791	68.704	67.943
M72x3	3	4g6g	71.952	71.577	70.003	69.871	68.704	68.023
M72x2	2	6g	71.962	71.682	70.663	70.483	69.797	69.251
M72x2	2	4g6g	71.962	71.682	70.663	70.551	69.797	69.319
M72x1.5	1.5	6g	71.968	71.732	70.994	70.834	70.344	69.910
M72x1.5	1.5	4g6g	71.968	71.732	70.994	70.894	70.344	69.970
M72x1	1	6g	71.974	71.794	71.324	71.184	70.891	70.568
M72x1	1	4g6g	71.974	71.794	71.324	71.234	70.891	70.618
M75x6	6	6g	74.920	74.320	71.023	70.743	68.425	67.047
M75x6	6	4g6g	74.920	74.320	71.023	70.843	68.425	67.147
M75x4	4	6g	74.940	74.465	72.342	72.106	70.610	69.642
M75x4	4	4g6g	74.940	74.465	72.342	72.192	70.610	69.728
M75x3	3	6g	74.952	74.577	73.003	72.791	71.704	70.943
M75x3	3	4g6g	74.952	74.577	73.003	72.871	71.704	71.023
M75x2	2	6g	74.962	74.682	73.663	73.483	72.797	72.251
M75x2	2	4g6g	74.962	74.682	73.663	73.551	72.797	72.319
M75x1.5	1.5	6g	74.968	74.732	73.994	73.834	73.344	72.910
M75x1.5	1.5	4g6g	74.968	74.732	73.994	73.894	73.344	72.970
M76x6	6	6g	75.920	75.320	72.023	71.743	69.425	68.047
M76x6	6	4g6g	75.920	75.320	72.023	71.843	69.425	68.147
M76x4	4	6g	75.940	75.465	73.342	73.106	71.610	70.642
M76x4	4	4g6g	75.940	75.465	73.342	73.192	71.610	70.728
M76x3	3	6g	75.952	75.577	74.003	73.791	72.704	71.943
M76x3	3	4g6g	75.952	75.577	74.003	73.871	72.704	72.023
M76x2	2	6g	75.962	75.682	74.663	74.483	73.797	73.251
M76x2	2	4g6g	75.962	75.682	74.663	74.551	73.797	73.319
M76x1.5	1.5	6g	75.968	75.732	74.994	74.834	74.344	73.910
M76x1.5	1.5	4g6g	75.968	75.732	74.994	74.894	74.344	73.970
M76x1	1	6g	75.974	75.794	75.324	75.184	74.891	74.568
M76x1	1	4g6g	75.974	75.794	75.324	75.234	74.891	74.618
M78x2	2	6g	77.962	77.682	76.663	76.483	75.797	75.251
M78x2	2	4g6g	77.962	77.682	76.663	76.551	75.797	75.319

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.
Fastener Thread Designations and Definitions Pitch, Minor, Major Diameters
Standard External Metric Thread and Fastener Sizes M 0.25 - M 1.4
Metric External Table Chart Thread Designations Sizes M 1.6 - M 18
Metric External Table Chart Thread Sizes M 20 - M 55
Metric External Table Chart Thread Sizes M 80 - M 100
Metric External Table Chart Thread Sizes M 105 - M 135
Metric External Table Chart Thread Sizes M 140 to M 175
Metric External Table Chart Thread Sizes M 180 to M 255
Metric External Table Chart Thread Sizes M 260 to M 1060