ENQUIRY

Heavy Hex Bolts Standard

EN 14399 - 4

Nominal size and thread diameter d
Pitch of thread P
Thread Length b
Depth of washer face c
Transition diameter da
Diameter of unthreaded shank
ds
Diameter of washer face dw
Width across corners e
Thickness of head
k
Radius under head  r
Width across flats
s
coarse pitch
Bolt
≤125
min.
max.
min.
min.
max.
min.
min.
min.
max.
min.
min.
max.
M12
1.75
23
0.4
0.6
15.20
11.30
12.70
20.10
23.91
7.55
8.45
1.2
21.16
22.00
M16
2.00
28
0.4
0.6
19.20
15.30
16.70
24.90
29.56
9.25
10.75
1.2
26.16
27.00
M20
2.50
33
0.4
0.8
24.00
19.16
20.84
29.50
35.03
12.10
13.90
1.5
31.00
32.00
M22
2.50
34
0.4
0.8
26.00
21.16
22.84
33.30
39.55
13.10
14.90
1.5
35.00
36.00
M24
3.00
39
0.4
0.8
28.00
23.16
24.84
38.00
45.20
14.10
15.90
1.5
40.00
41.00
M27
3.00
41
0.4
0.8
32.00
26.16
27.84
42.80
50.85
16.10
17.90
2.0
45.00
46.00
M30
3.50
44
0.4
0.8
35.00
29.16
30.84
46.60
55.37
17.95
20.05
2.0
49.00
50.00
M36
4.00
52
0.4
0.8
41.00
35.00
37.00
55.90
66.44
21.95
24.05
2.0
58.80
60.00



EN 14399-4 Dimensions of bolts

Thread d
M12
M16
M20
M22
M24
M27
M30
M36
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.
nom.
min.
max.
35
33.75
36.25
6.75
12.00
40
38.75
41.25
11.75
17.00
6.00
12.00
45
43.75
46.25
16.75
22.00
11.00
17.00
4.50
12.00
50
48.75
51.25
21.75
27.00
16.00
22.00
9.50
17.00
8.50
16.00
55
53.50
56.50
26.75
32.00
21.00
27.00
14.50
22.00
13.50
21.00
60
58.50
61.50
31.75
37.00
26.00
32.00
19.50
27.00
18.50
26.00
12.00
21.00
65
63.50
66.50
36.75
42.00
31.00
37.00
24.50
32.00
23.50
31.00
17.00
26.00
70
68.50
71.50
41.75
47.00
36.00
42.00
29.50
37.00
28.50
36.00
22.00
31.00
20.00
29.00
75
73.50
76.50
46.75
52.00
41.00
47.00
34.50
42.00
33.50
41.00
27.00
36.00
25.00
34.00
20.50
31.00
80
78.50
81.50
51.75
57.00
46.00
52.00
39.50
47.00
38.50
46.00
32.00
41.00
30.00
39.00
25.50
36.00
85
83.25
86.75
56.75
62.00
51.00
57.00
44.50
52.00
43.50
51.00
37.00
46.00
35.00
44.00
30.50
41.00
21.00
33.00
90
88.25
91.75
61.75
67.00
56.00
62.00
49.50
57.00
48.50
56.00
42.00
51.00
40.00
49.00
35.00
47.00
26.00
38.00
95
93.25
96.75
66.75
72.00
61.00
67.00
54.50
62.00
53.50
61.00
47.00
56.00
45.00
54.00
40.50
51.00
31.00
43.00
100
98.25
101.75
66.00
72.00
59.50
67.00
58.50
66.00
52.00
61.00
50.00
59.00
45.50
56.00
36.00
48.00
105
103.25
106.75
71.00
77.00
64.50
72.00
63.50
71.00
57.00
66.00
55.00
64.00
50.50
61.00
41.00
53.00
110
108.25
111.75
76.00
82.00
69.50
77.00
68.50
76.00
62.00
71.00
60.00
69.00
55.50
66.00
46.00
58.00
115
113.25
116.75
81.00
87.00
74.50
82.00
73.50
81.00
67.00
76.00
65.00
74.00
60.50
71.00
51.00
63.00
120
118.25
121.75
86.00
92.00
79.50
87.00
78.50
86.00
72.00
81.00
70.00
79.00
65.50
76.00
56.00
68.00

Thread d
M12
M16
M20
M22
M24
M27
M30
M36
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.
nom.
min.
max.
125
123.00
127.00
91.00
97.00
84.50
92.00
83.50
91.00
77.00
86.00
75.00
84.00
70.50
81.00
61.00
73.00
130
128.00
132.00
96.00
102.00
89.50
97.00
88.50
96.00
82.00
91.00
80.00
89.00
75.50
86.00
66.00
78.00
135
133.00
137.00
94.50
102.00
93.50
101.00
87.00
96.00
85.00
94.00
80.50
91.00
71.00
83.00
140
138.00
142.00
99.50
107.00
98.50
106.00
92.00
101.00
90.00
99.00
85.50
96.00
76.00
88.00
145
143.00
147.00
104.50
112.00
103.50
111.00
97.00
106.00
95.00
104.00
90.50
101.00
81.00
93.00
150
148.00
152.00
109.50
117.00
108.50
116.00
102.00
111.00
100.00
109.00
95.50
106.00
86.00
98.00
155
153.00
159.00
114.50
122.00
113.50
121.00
107.00
116.00
105.00
114.00
100.50
111.00
91.00
103.00
160
158.00
164.00
118.50
126.00
112.00
121.00
110.00
119.00
105.50
116.00
96.00
108.00
165
163.00
169.00
123.50
131.00
117.00
126.00
115.00
124.00
110.50
121.00
101.00
113.00
170
168.00
174.00
122.00
131.00
120.00
129.00
115.50
126.00
106.00
118.00
175
173.00
179.00
127.00
136.00
125.00
134.00
120.50
131.00
111.00
123.00
180
178.00
184.00
132.00
141.00
130.00
139.00
125.50
136.00
116.00
128.00
185
182.70
189.60
137.00
146.00
135.00
144.00
130.50
141.00
121.00
133.00
190
187.70
194.60
142.00
151.00
140.00
149.00
135.50
146.00
126.00
138.00
195
192.70
199.60
147.00
156.00
145.00
154.00
140.50
151.00
131.00
143.00
200
197.70
204.60
150.00
159.00
147.50
156.00
136.00
148.00


Specification for bolts and reference standards

Characteristic Standard
Material Steel
General Requirements EN 14399-1
Thread Tolerance 6ga
International Standard ISO 261, ISO 965-2
Mechanical Properties Property Class 10.9
European Standard EN  ISO 898-1
Impact Strength Value Kv, min = 27 J at -20°C
Test Pieceb ISO 148
Test EN 10045-1
Tolerances Product Grade C except: dimensions c and r.   + IT 17
Tolerance for length≥ 155mm:  – 1/2 IT 17
International Standard EN ISO 4759-1
Surface Finishc Self Colour as processed
Hot Dip Galvanised EN ISO 1461
Others to be agreed
Surface discontinuities Limits for surface discontinuities as specified in EN26157-1.
Acceptability For acceptance procedure, see EN ISO 3269.
a   The tolerance class specified applies before hot-dip galvanising. Hot-dip galvanised bolts are intended  for assembly with oversize tapped nuts.
b   The location of chappy V-notch test pieces in the bolt shall be specified in EN ISO 898-1.
c Attention is drawn to the need to consider the risk of hydrogen embrittlement in the case of bolts of property class 10.9, when selecting an appropriate surface treatment process (e.g. cleaning and coating), see the relevant coating standards.
d   “As processed” means the normal finish resulting from manufacture with a light coating of oil. e   Other coatings may be negotiated between the purchaser and the manufacturer provided
they do not impair the mechanical properties or the functional characteristics. Coatings of cadmium  or  cadmium  alloy  are  not  permitted.


Important Note


Preloaded bolted assemblies are very sensitive to differences in manufacture and lubrication. Therefore it is important that the assembly is supplied by one manufacturer who is always responsible for the function of the assembly. For the same reason, it is important that the coating of the assembly is under the control of one manufacturer. Beside the mechanical properties of the components, the functionality of the assembly requires that the specific preload can be achieved if the assembly is tightened with a suitable procedure. For this purpose a test method for the suitability of the components for preloading was created, which will demonstrate whether the function of the assembly is fulfilled.