Internal Metric Thread Table Chart Fastener Sizes M75 - M120

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

The following table chart are standard metric internal thread sizes M75 - M120 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 internal thread design. All units in mm.

Metric Internal and External threads

Where:

H = P ( 31/2 / 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
Min
Max
Min
Max
Min
Max
Basic
M75x6
6
6H
68.505
69.305
71.103
71.478
75.000
76.241
69.000
M75x4
4
6H
70.670
71.270
72.402
72.717
75.000
75.892
71.000
M75x3
3
6H
71.752
72.252
73.051
73.331
75.000
75.713
72.000
M75x2
2
6H
72.835
73.210
73.701
73.937
75.000
75.525
73.000
M75x1.5
1.5
6H
73.376
73.676
74.026
74.238
75.000
75.428
73.500
M76x6
6
6H
69.505
70.305
72.103
72.478
76.000
77.241
70.000
M76x4
4
6H
71.670
72.270
73.402
73.717
76.000
76.892
72.000
M76x3
3
6H
72.752
73.252
74.051
74.331
76.000
76.713
73.000
M76x2
2
6H
73.835
74.210
74.701
74.937
76.000
76.525
74.000
M76x1.5
1.5
6H
74.376
74.676
75.026
75.238
76.000
76.429
74.500
M76x1
1
6H
74.917
75.153
75.350
75.540
76.000
76.334
75.000
M78x2
2
6H
75.835
76.210
76.701
76.937
78.000
78.525
76.000
M80x6
6
6H
73.505
74.305
76.103
76.478
80.000
81.241
74.000
M80x4
4
6H
75.670
76.270
77.402
77.717
80.000
80.892
76.000
M80x3
3
6H
76.752
77.252
78.051
78.331
80.000
80.713
77.000
M80x2
2
6H
77.835
78.210
78.701
78.937
80.000
80.525
78.000
M80x1.5
1.5
6H
78.376
78.676
79.026
79.238
80.000
80.428
78.500
M80x1
1
6H
78.917
79.153
79.350
79.540
80.000
80.334
79.000
M82x2
2
6H
79.835
80.210
80.701
80.937
82.000
82.525
80.000
M85x6
6
6H
78.505
79.305
81.103
81.478
85.000
86.241
79.000
M85x4
4
6H
80.670
81.270
82.402
82.717
85.000
85.892
81.000
M85x3
3
6H
81.752
82.252
83.051
83.331
85.000
85.713
82.000
M85x2
2
6H
82.835
83.210
83.701
83.937
85.000
85.525
83.000
M85x1.5
1.5
6H
83.376
83.676
84.026
84.238
85.000
85.429
83.500
M90x6
6
6H
83.505
84.305
86.103
86.478
90.000
91.241
84.000
M90x4
4
6H
85.670
86.270
87.402
87.717
90.000
90.892
86.000
M90x3
3
6H
86.752
87.252
88.051
88.331
90.000
90.713
87.000
M90x2
2
6H
87.835
88.210
88.701
88.937
90.000
90.525
88.000
M90x1.5
1.5
6H
88.376
88.676
89.026
89.238
90.000
90.429
88.500
M95x6
6
6H
88.505
89.305
91.103
91.503
95.000
96.266
89.000
M95x4
4
6H
90.670
91.270
92.402
92.737
95.000
95.912
91.000
M95x3
3
6H
91.752
92.252
93.051
93.351
95.000
95.733
92.000
M95x2
2
6H
92.835
93.210
93.701
93.951
95.000
95.539
93.000
M95x1.5
1.5
6H
93.376
93.676
94.026
94.262
95.000
95.453
93.500
M100x6
6
6H
93.505
94.305
96.103
96.503
100.000
101.266
94.000
M100x4
4
6H
95.670
96.270
97.402
97.737
100.000
100.912
96.000
M100x3
3
6H
96.752
97.252
98.051
98.351
100.000
100.733
97.000
M100x2
2
6H
97.835
98.210
98.701
98.951
100.000
100.539
98.000
M100x1.5
1.5
6H
98.376
98.676
99.026
99.262
100.000
100.453
98.500
M105x6
6
6H
98.505
99.305
101.103
101.503
105.000
106.266
99.000
M105x4
4
6H
100.670
101.270
102.402
102.737
105.000
105.912
101.000
M105x3
3
6H
101.752
102.252
103.051
103.351
105.000
105.733
102.000
M105x2
2
6H
102.835
103.210
103.701
103.951
105.000
105.539
103.000
M105x1.5
1.5
6H
103.376
103.676
104.026
104.262
105.000
105.453
103.500
M110x6
6
6H
103.505
104.305
106.103
106.503
110.000
111.266
104.000
M110x4
4
6H
105.670
106.270
107.402
107.737
110.000
110.912
106.000
M110x3
3
6H
106.752
107.252
108.051
108.351
110.000
110.733
107.000
M110x2
2
6H
107.835
108.210
108.701
108.951
110.000
110.539
108.000
M110x1.5
1.5
6H
108.376
108.676
109.026
109.262
110.000
110.453
108.500
M115x6
6
6H
108.505
109.305
111.103
111.503
115.000
116.266
109.000
M115x4
4
6H
110.670
111.270
112.402
112.737
115.000
115.912
111.000
M115x3
3
6H
111.752
112.252
113.051
113.351
115.000
115.733
112.000
M115x2
2
6H
112.835
113.210
113.701
113.951
115.000
115.539
113.000
M115x1.5
1.5
6H
113.376
113.676
114.026
114.262
115.000
115.453
113.500
M120x6
6
6H
113.505
114.305
116.103
116.503
120.000
121.266
114.000
M120x4
4
6H
115.670
116.270
117.402
117.737
120.000
120.912
116.000
M120x3
3
6H
116.752
117.252
118.051
118.351
120.000
120.733
117.000
M120x2
2
6H
117.835
118.210
118.701
118.951
120.000
120.539
118.000
M120x1.5
1.5
6H
118.376
118.676
119.026
119.262
120.000
120.453
118.500

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