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 798
M24
s size square 50
e the diameter of the circumscribed circle (not less than) 65
m height of the nut 30 Thread · ISO 261/262
Pitch P 3
d2 22.051
d3 20.319
Tap drill 21
Stress area As 352.5 mm² Size sheet · DIN 798
M30
s size square 60
e the diameter of the circumscribed circle (not less than) 80
m height of the nut 36 Thread · ISO 261/262
Pitch P 3.5
d2 27.727
d3 25.706
Tap drill 26.5
Stress area As 560.59 mm² Size sheet · DIN 798
M36
s size square 70
e the diameter of the circumscribed circle (not less than) 92
m height of the nut 45 Thread · ISO 261/262
Pitch P 4
d2 33.402
d3 31.093
Tap drill 32
Stress area As 816.72 mm² Size sheet · DIN 798
M42
s size square 80
e the diameter of the circumscribed circle (not less than) 105
m height of the nut 53 Thread · ISO 261/262
Pitch P 4.5
d2 39.077
d3 36.479
Tap drill 37.5
Stress area As 1120.91 mm² Size sheet · DIN 798
M48
s size square 90
e the diameter of the circumscribed circle (not less than) 118
m height of the nut 60 Thread · ISO 261/262
Pitch P 5
d2 44.752
d3 41.866
Tap drill 43
Stress area As 1473.15 mm² Size sheet · DIN 798
M56
s size square 100
e the diameter of the circumscribed circle (not less than) 132
m height of the nut 70 Thread · ISO 261/262
Pitch P 5.5
d2 52.428
d3 49.252
Tap drill 50.5
Stress area As 2030.02 mm² Size sheet · DIN 798
M64
s size square 110
e the diameter of the circumscribed circle (not less than) 145
m height of the nut 80 Thread · ISO 261/262
Pitch P 6
d2 60.103
d3 56.639
Tap drill 58
Stress area As 2675.97 mm² Size sheet · DIN 798
M72
s size square 120
e the diameter of the circumscribed circle (not less than) 160
m height of the nut 90 Size sheet · DIN 798
M80
s size square 130
e the diameter of the circumscribed circle (not less than) 170
m height of the nut 100 Size sheet · DIN 798
M90
s size square 145
e the diameter of the circumscribed circle (not less than) 190
m height of the nut 112 Size sheet · DIN 798
M100
s size square 165
e the diameter of the circumscribed circle (not less than) 220
m height of the nut 125 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.