Dimensions mm · values as the standard states them Ranges read min – max; ≤ / ≥ where the standard gives one limit, ≈ for approximate values. Sizes in (brackets) are non-preferred. Select a row for its size sheet.
Size sheet · DIN 74361 A
M12x1.5
s width across flats 17
h height of the nut 18
d2 external diameter of the nut 23 Thread · ISO 261/262
Pitch P 1.5
d2 11.026
d3 10.16
Tap drill 10.5
Stress area As 88.13 mm² Size sheet · DIN 74361 A
M14x1.5
s width across flats 19
h height of the nut 20
d2 external diameter of the nut 26 Thread · ISO 261/262
Pitch P 1.5
d2 13.026
d3 12.16
Tap drill 12.5
Stress area As 124.55 mm² Size sheet · DIN 74361 A
M18x1.5
s width across flats 24
h height of the nut 25
d2 external diameter of the nut 28 Thread · ISO 261/262
Pitch P 1.5
d2 17.026
d3 16.16
Tap drill 16.5
Stress area As 216.23 mm² Size sheet · DIN 74361 A
M20x1.5
s width across flats 27
h height of the nut 27
d2 external diameter of the nut 33 Thread · ISO 261/262
Pitch P 1.5
d2 19.026
d3 18.16
Tap drill 18.5
Stress area As 271.5 mm² Size sheet · DIN 74361 A
M22x1.5
s width across flats 30
h height of the nut 30
d2 external diameter of the nut 36 Thread · ISO 261/262
Pitch P 1.5
d2 21.026
d3 20.16
Tap drill 20.5
Stress area As 333.06 mm² Provenance
Draft — values taken from a single source and not yet cross-checked.
fasteners.eu dimensions, lengths, materials, property classes, current norm, equivalent norms Accessed 2026-09-23 · For design and safety-critical use, consult the current edition of the standard.