Dimensions mm · values as the standard states them Size P d1 d2 mass S M10 1.5 11 – 11.43
19.16 – 20
13.8
8
±1
M12 1.75 13.5 – 13.93
23.16 – 24
19.4
8
±1
M16 2 17.5 – 17.93
29.16 – 30
29.3
8
±1
M20 2.5 22 – 22.52
36 – 37
42.7
8
±1
M24 3 26 – 26.52
43 – 44
62.1
8
±1
M27 3 30 – 30.52
49 – 50
78.9
8
±1
M30 3.5 33 – 33.62
54.8 – 56
101
8
±1
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 7989
M10
d1 inside diameter 11 – 11.43
d2 outside diameter 19.16 – 20
mass mass per 1000 pieces (kg) 13.8
S 8 Thread · ISO 261/262
Pitch P 1.5
d2 9.026
d3 8.16
Tap drill 8.5
Stress area As 57.99 mm² Size sheet · DIN 7989
M12
d1 inside diameter 13.5 – 13.93
d2 outside diameter 23.16 – 24
mass mass per 1000 pieces (kg) 19.4
S 8 Thread · ISO 261/262
Pitch P 1.75
d2 10.863
d3 9.853
Tap drill 10.25
Stress area As 84.27 mm² Size sheet · DIN 7989
M16
d1 inside diameter 17.5 – 17.93
d2 outside diameter 29.16 – 30
mass mass per 1000 pieces (kg) 29.3
S 8 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 mm² Size sheet · DIN 7989
M20
d1 inside diameter 22 – 22.52
d2 outside diameter 36 – 37
mass mass per 1000 pieces (kg) 42.7
S 8 Thread · ISO 261/262
Pitch P 2.5
d2 18.376
d3 16.933
Tap drill 17.5
Stress area As 244.79 mm² Size sheet · DIN 7989
M24
d1 inside diameter 26 – 26.52
d2 outside diameter 43 – 44
mass mass per 1000 pieces (kg) 62.1
S 8 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 7989
M27
d1 inside diameter 30 – 30.52
d2 outside diameter 49 – 50
mass mass per 1000 pieces (kg) 78.9
S 8 Thread · ISO 261/262
Pitch P 3
d2 25.051
d3 23.319
Tap drill 24
Stress area As 459.41 mm² Size sheet · DIN 7989
M30
d1 inside diameter 33 – 33.62
d2 outside diameter 54.8 – 56
mass mass per 1000 pieces (kg) 101
S 8 Thread · ISO 261/262
Pitch P 3.5
d2 27.727
d3 25.706
Tap drill 26.5
Stress area As 560.59 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.
Data notes (1) M10 d2: min/max labels swapped in the source table — corrected.