ISO Metric Threads

Coarse Thread

Major Diameter mmPitch mmTensile Stress Area mm2Tapping Drill mm
1.60.351.271.35
1.80.351.701.55
20.402.11.70
2.20.452.51.90
2.50.453.42.20
30.505.02.65
3.50.606.83.10
40.708.83.50
4.50.7511.54.0
50.8014.24.50
61.0020.15.3
71.00
81.2536.67.1
91.25
101.5058.08.8
111.50
121.7584.310.7
142.00
162.00157.014.5
182.50
202.50
222.50
243.00

Fine Thread

Major Diameter mmPitch mmTensile Stress Area mm2Tapping Drill mm
1.60.20
1.80.20
20.25
2.20.25
2.50.35
30.35
3.50.35
40.50
4.50.50
50.50
60.75
70.75
81.00
101.25
121.25
141.50
161.50
181.50
201.50
221.50
242.00

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Subjects: Fixings and Fasteners