Dimensions mm · values as the standard states them Size P d d1 a b1 b2 L1 L2 M6 1 10
5.7 – 6.3
9.5
50
50
74
77
M8 1.25 11
7.5 – 8.5
11
52
60
80
98
M10 1.5 15
7.5 – 8.5
14
59
73
95
116.5
M12 1.75 17
9.5 – 10.5
18
66
90
107
146
M16 2 22
9.5 – 10.5
19
85
100
146
165
M20 2.5 24
11.5 – 12.5
21
100
105
170
180
M24 3 33
11.5 – 12.5
29
134
135
213
225
M30 3.5 39
15.5 – 16.5
31
150
140
255
255
M36 4 37
15.5 – 16.5
35
150
170
260
300
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 1478 EH
M6
d diameter of the eye 10
d1 hole diameter 5.7 – 6.3
a opening Range 9.5
b1 length of thread 50
b2 length of thread 50
L1 length 74
L2 length 77 Thread · ISO 261/262
Pitch P 1
d2 5.35
d3 4.773
Tap drill 5
Stress area As 20.12 mm² Size sheet · DIN 1478 EH
M8
d diameter of the eye 11
d1 hole diameter 7.5 – 8.5
a opening Range 11
b1 length of thread 52
b2 length of thread 60
L1 length 80
L2 length 98 Thread · ISO 261/262
Pitch P 1.25
d2 7.188
d3 6.466
Tap drill 6.75
Stress area As 36.61 mm² Size sheet · DIN 1478 EH
M10
d diameter of the eye 15
d1 hole diameter 7.5 – 8.5
a opening Range 14
b1 length of thread 59
b2 length of thread 73
L1 length 95
L2 length 116.5 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 1478 EH
M12
d diameter of the eye 17
d1 hole diameter 9.5 – 10.5
a opening Range 18
b1 length of thread 66
b2 length of thread 90
L1 length 107
L2 length 146 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 1478 EH
M16
d diameter of the eye 22
d1 hole diameter 9.5 – 10.5
a opening Range 19
b1 length of thread 85
b2 length of thread 100
L1 length 146
L2 length 165 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 1478 EH
M20
d diameter of the eye 24
d1 hole diameter 11.5 – 12.5
a opening Range 21
b1 length of thread 100
b2 length of thread 105
L1 length 170
L2 length 180 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 1478 EH
M24
d diameter of the eye 33
d1 hole diameter 11.5 – 12.5
a opening Range 29
b1 length of thread 134
b2 length of thread 135
L1 length 213
L2 length 225 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 1478 EH
M30
d diameter of the eye 39
d1 hole diameter 15.5 – 16.5
a opening Range 31
b1 length of thread 150
b2 length of thread 140
L1 length 255
L2 length 255 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 1478 EH
M36
d diameter of the eye 37
d1 hole diameter 15.5 – 16.5
a opening Range 35
b1 length of thread 150
b2 length of thread 170
L1 length 260
L2 length 300 Thread · ISO 261/262
Pitch P 4
d2 33.402
d3 31.093
Tap drill 32
Stress area As 816.72 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.