ENQUIRY

DIN 931 / DIN EN ISO 4014

Hex head bolts

Nominal size and threaddiameter
d
Pitch of thread P
Thread Length b
Depth of washer face c
Transition Diameter da
Diameter of unthreaded shank
ds
Dia. of washer face dw
Width across corners e
Thickness of head k
Radius under head  r
Width across flats
   s
coarse pitch
Bolt
≤125
Bolt 125-200
Bolt
≥200
min.
max.
max.
min.
max.
min.
min.
nom.
min.
min.
max.
M10
1.50
26
32
45
0.15
0.6
11.20
9.64
10.0
14.47
17.59
6.40
0.4
15.57
16.00
M12
1.75
30
36
49
0.15
0.6
13.70
11.57
12.00
16.47
19.85
7.50
0.6
17.57
18.00
M14
2.00
34
40
53
0.15
0.6
15.70
13.57
14.00
19.15
22.78
8.80
0.6
20.16
21.00
M16
2.00
38
44
57
0.2
0.8
17.70
15.57
16.00
22.00
26.17
10.00
0.6
23.15
24.00
M18
2.50
42
48
61
0.2
0.8
20.20
17.57
18.00
24.85
29.56
11.50
0.6
26.16
27.00
M20
2.50
46
52
65
0.2
0.8
22.40
19.48
20.00
27.70
32.95
12.50
0.8
29.16
30.00
M22
2.50
50
56
69
0.2
0.8
24.40
21.48
22.00
31.35
37.29
14.00
0.8
33.00
34.00
M24
3.00
54
60
73
0.2
0.8
26.40
23.48
24.00
33.25
39.55
15.00
0.8
35.00
36.00
M27
3.00
60
66
79
0.2
0.8
30.40
26.48
27.00
38.00
45.20
17.00
1.0
40.00
41.00
M30
3.50
66
72
85
0.2
0.8
33.40
29.48
30.00
42.75
50.85
18.70
1.0
45.00
46.00
M33
3.50
-
78
91
0.2
0.8
36.40
32.38
33.00
46.55
55.37
21.00
1.0
49.00
50.00
M36
4.00
-
84
97
0.2
0.8
39.40
35.38
36.00
51.11
60.79
22.50
1.0
53.80
55.00
M39
4.00
-
90
103
0.3
1.0
42.40
38.38
39.00
55.86
66.44
25.00
1.0
58.80
60.00
M42
4.50
-
95
109
0.3
1.0
45.60
41.38
42.00
59.95
71.30
26.00
1.2
63.10
65.00
M45
4.50
-
102
115
0.3
1.0
48.6
44.38
45.00
64.70
76.95
28.00
1.2
68.10
70.00
M48
5.00
-
108
121
0.3
1.0
52.60
47.38
48.00
69.45
82.60
30.00
1.6
73.10
75.00
M52
5.00
-
116
129
0.3
1.0
56.60
51.26
52.00
74.20
88.25
33.00
1.6
78.10
80.00
M56
5.50
-
-
137
0.3
1.0
63.00
55.26
56.00
78.66
93.56
35.00
2.0
82.80
85.00
M60
5.50
-
-
145
0.3
1.0
67.00
59.26
60.00
83.41
99.21
38.00
2.00
87.0
90.00
M64
6.00
-
-
153
0.3
1.0
71.00
63.26
64.00
88.16
104.86
40.00
2.0
92.80
96.00



EN ISO 4014 (DIN931) Dimensions of bolts (concluded)

d
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
l
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
nom.
50
16.50 24.00 11.25 20.00                                
55
21.50 29.00 16.25 25.00                                
60
26.50 34.00 21.25 30.00 16.00 26.00                            
65
31.50 39.00 26.25 35.00 21.00 31.00 17.00 27.00                        
70
36.50 44.00 31.25 40.00 26.00 36.00 22.00 32.00 15.50 28.00                    
80
46.50 54.00 41.25 50.00 36.00 46.00 32.00 42.00 25.50 38.00 21.50 34.00                
90
56.50 64.00 91.25 60.00 46.00 56.00 42.00 52.00 35.50 48.00 31.50 44.00 27.50 40.00 21.00 36.00        
100
66.50 74.00 61.25 70.00 56.00 66.00 52.00 62.00 45.50 58.00 41.50 54.00 37.50 50.00 31.00 46.00 25.00 40.00    
110
    71.25 80.00 66.00 76.00 62.00 72.00 55.50 68.00 51.50 64.00 47.50 60.00 41.00 56.00 35.00 50.00 26.50 44.00
120
    81.25 90.00 76.00 86.00 72.00 82.00 65.50 78.00 61.50 74.00 57.50 70.00 51.00 66.00 45.00 60.00 36.50 54.00
130
        80.00 90.00 76.00 86.00 69.50 82.00 65.50 78.00 61.50 74.00 55.00 70.00 49.00 64.00 40.50 58.00
140
        90.00 100.00 86.00 96.00 79.50 92.00 75.50 88.00 71.50 84.00 65.00 80.00 59.00 74.00 50.50 68.00
150
            96.00 106.00 89.50 102.00 85.50 98.00 81.50 94.00 75.00 90.00 69.00 84.00 60.50 78.00
160
            106.00 116.00 99.50 112.00 95.50 108.00 91.50 104.00 85.00 100.00 79.00 94.00 70.50 88.00
180
                119.50 132.00 115.50 128.00 111.50 124.00 105.00 120.00 99.00 114.00 90.50 108.00
200
                    135.50 148.00 131.50 144.00 125.00 140.00 119.00 134.00 110.50 128.00
220
                        138.50 151.00 132.00 147.00 126.00 141.00 117.50 135.00
240
                            152.00 157.00 146.00 161.00 137.50 155.00
260
                                166.00 181.00 157.50 175.00
280
                                    177.50 195.00
300
                                    197.50 215.00

d
M33
M36
M39
M42
M45
M48
M52
M56
M60
l
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
ls
min.
lg
max.
nom.
130
34.50 52.00                                
140
44.50 62.00 36.00 56.00                            
150
54.50 72.00 46.00 66.00 40.00 60.00                        
160
64.50 82.00 56.00 76.00 50.00 70.00 41.50 64.00                    
180
84.50 102.00 76.00 96.00 70.00 90.00 61.50 84.00 55.50 78.00 47.00 72.00            
200
104.50 122.00 96.00 116.00 90.00 110.00 81.50 104.00 75.50 98.00 57.00 92.00 59.00 84.00        
220
111.50 129.00 103.00 123.00 97.00 117.00 88.50 111.00 82.50 105.00 74.00 99.00 66.00 91.00 55.50 83.00    
240
131.50 149.00 123.00 143.00 117.00 137.00 108.50 131.00 102.50 125.00 94.00 119.00 86.00 111.00 75.50 103.00 67.50 95.00
260
151.50 169.00 143.00 163.00 137.00 157.00 128.50 151.00 122.50 145.00 114.00 139.00 106.00 131.00 95.50 123.00 87.50 115.00
280
171.50 189.00 163.00 183.00 157.00 177.00 148.50 171.00 142.50 165.00 134.00 159.00 126.00 151.00 115.50 143.00 107.50 135.00
300
191.50 209.00 183.00 203.00 177.00 197.00 168.50 191.00 162.50 185.00 154.00 179.00 146.00 171.00 135.50 163.00 127.50 155.00
320
211.50 229.00 203.00 223.00 197.00 217.00 188.50 211.00 182.50 205.00 174.00 199.00 166.00 191.00 155.50 183.00 147.50 175.00
340
    223.00 243.00 217.00 237.00 208.50 231.00 202.50 225.00 194.00 219.00 186.00 211.00 175.50 203.00 167.50 195.00
360
    243.00 263.00 237.00 257.00 228.50 251.00 222.50 245.00 214.00 239.00 206.00 231.00 195.50 223.00 187.50 215.00
380
        257.00 277.00 248.50 271.00 242.50 265.00 234.00 259.00 226.00 251.00 215.50 243.00 207.50 235.00
400
            288.50 291.00 262.50 285.00 254.00 279.00 246.00 271.00 235.50 263.00 227.50 255.00
420
            298.50 311.00 282.50 305.00 274.00 299.00 266.00 291.00 255.50 283.00 247.50 275.00
440
            308.50 331.00 302.50 325.00 294.00 319.00 286.00 311.00 275.50 303.00 267.50 295.00
460
                    314.00 339.00 306.00 331.00 295.50 323.00 287.50 315.00
480
                    334.00 359.00 326.00 351.00 315.50 343.00 307.50 335.00
500
                            335.50 363.00 327.50 355.00


Specification for bolts and reference standards

Characteristic Standard
Material Steel
General
Requirements
International Standards ISO 8992
Thread Tolerance 6g
International Standard ISO 724, ISO 965-1
Mechanical Properties Property Classa d < 3mm: as agreed   3mm ≤ d ≤ 39mm: 8.8, 10.9 d > 39mm: as agreed
International Standards 3mm ≤ d ≤ 39mm: ISO 898-1 d < 3mm and d > 39mm
Tolerances International Standard ISO 4759-1
Finish and/or coating As processed
Requirements for electroplating are covered in ISO 4042
Requirements for non-electrolytically applied zinc flake coatings are covered in ISO 10683
If different electroplating requirements are desired or if requirements are needed for other finishes, they should be agreed between customer and supplier.
Limits for surface discontinuities are covered in ISO 6157-1
Acceptibility For acceptance procedure, see ISO 3269.
a   For other property classes see ISO 898-1.


Mechanical and physical properties

Mechanical or physical property Property Class
8.8
10.9
12.9
≤ M16
> M16
Tensile Strength
nom.
800
1000
1200
min.
800
830
1040
1220
Yield Strength 0.2% offset non- proportional elongation
nom.
640
640
900
1080
min.
640
660
940
1100
Percentage elongation after fracture for machined test piece
min.
12
12
9
8
Stress Under Proof Load
nom.
580
600
830
970
Rockwell Hardness, HRC
min.
22
23
32
39
max.
32
34
39
44
All units are displayed as newton per square millimeter (N/mm²)