Dimensions mm · values as the standard states them Size P s b c a M8 1.25 3
± 1,5
20
24
± 5
16
± 3
M10 1.5 3.5
± 1,5
25
30
± 5
20
± 3
M12 1.75 4
± 1,5
30
36
± 5
24
± 3
M16 2 5
± 1,5
40
48
± 5
32
± 3
M20 2.5 6
± 1,5
50
60
± 5
40
± 3
M24 3 8
± 1,5
60
72
± 5
48
± 3
M30 3.5 —
75
—
—
M36 4 —
90
—
—
M42 4.5 —
105
—
—
M48 5 —
120
—
—
M56 5.5 —
140
—
—
M64 6 —
160
—
—
M72x6 6 —
180
—
—
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 529 D
M8
s thickness 3
b 20
c head height 24
a head width 16 Thread · ISO 261/262
Pitch P 1.25
d2 7.188
d3 6.466
Tap drill 6.75
Stress area As 36.61 mm² Standard lengths
80 · 100 · 125 · 160 · 200
Size sheet · DIN 529 D
M10
s thickness 3.5
b 25
c head height 30
a head width 20 Thread · ISO 261/262
Pitch P 1.5
d2 9.026
d3 8.16
Tap drill 8.5
Stress area As 57.99 mm² Standard lengths
100 · 125 · 160 · 200 · 250
Size sheet · DIN 529 D
M12
s thickness 4
b 30
c head height 36
a head width 24 Thread · ISO 261/262
Pitch P 1.75
d2 10.863
d3 9.853
Tap drill 10.25
Stress area As 84.27 mm² Standard lengths
125 · 160 · 200 · 250 · 320
Size sheet · DIN 529 D
M16
s thickness 5
b 40
c head height 48
a head width 32 Thread · ISO 261/262
Pitch P 2
d2 14.701
d3 13.546
Tap drill 14
Stress area As 156.67 mm² Standard lengths
160 · 200 · 250 · 320 · 400 · 500
Size sheet · DIN 529 D
M20
s thickness 6
b 50
c head height 60
a head width 40 Thread · ISO 261/262
Pitch P 2.5
d2 18.376
d3 16.933
Tap drill 17.5
Stress area As 244.79 mm² Standard lengths
200 · 250 · 320 · 400 · 500 · 630 · 800
Size sheet · DIN 529 D
M24
s thickness 8
b 60
c head height 72
a head width 48 Thread · ISO 261/262
Pitch P 3
d2 22.051
d3 20.319
Tap drill 21
Stress area As 352.5 mm² Standard lengths
320 · 400 · 500 · 630 · 800 · 1000 · 1250
Size sheet · DIN 529 D
M30
b 75 Thread · ISO 261/262
Pitch P 3.5
d2 27.727
d3 25.706
Tap drill 26.5
Stress area As 560.59 mm² Standard lengths
400 · 500 · 630 · 800 · 1000 · 1250 · 1600 · 2000
Size sheet · DIN 529 D
M36
b 90 Thread · ISO 261/262
Pitch P 4
d2 33.402
d3 31.093
Tap drill 32
Stress area As 816.72 mm² Standard lengths
500 · 630 · 800 · 1000 · 1250 · 1600 · 2000 · 2500
Size sheet · DIN 529 D
M42
b 105 Thread · ISO 261/262
Pitch P 4.5
d2 39.077
d3 36.479
Tap drill 37.5
Stress area As 1120.91 mm² Standard lengths
630 · 800 · 1000 · 1250 · 1600 · 2000 · 2500
Size sheet · DIN 529 D
M48
b 120 Thread · ISO 261/262
Pitch P 5
d2 44.752
d3 41.866
Tap drill 43
Stress area As 1473.15 mm² Standard lengths
800 · 1000 · 1250 · 1600 · 2000 · 2500 · 3200
Size sheet · DIN 529 D
M56
b 140 Thread · ISO 261/262
Pitch P 5.5
d2 52.428
d3 49.252
Tap drill 50.5
Stress area As 2030.02 mm² Standard lengths
1000 · 1250 · 1600 · 2000 · 2500 · 3200
Size sheet · DIN 529 D
M64
b 160 Thread · ISO 261/262
Pitch P 6
d2 60.103
d3 56.639
Tap drill 58
Stress area As 2675.97 mm² Standard lengths
1250 · 1600 · 2000 · 2500 · 3200
Size sheet · DIN 529 D
M72x6
b 180 Standard lengths
1600 · 2000 · 2500 · 3200
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.