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BS 7419-1991
Metric square head square neck anchor bolts
Nom
P
b max
b min
ds max
ds min
k min
k max
r min
s max
s min
k1 min
k1 max
s1 max
s1 min
M16
2
122
116
16.7
15.3
9.25
10.75
0.6
24
23.16
7.25
8.75
16.7
15.3
M20
2.5
127.5
120
20.84
19.16
11.6
13.4
0.8
30
29.16
9.25
10.75
20.84
19.16
M24
3
133
124
24.84
23.16
14.1
15.9
0.8
36
35
11.1
12.9
24.84
23.16
M30
3.5
140.5
130
30.84
29.16
17.65
19.75
1
46
45
14.1
15.9
30.84
29.16
M36
4
148
136
37
35
21.45
23.55
1
55
53.8
17.1
18.9
37
35
M42
4.5
155.5
142
43
41
24.95
27.05
1.2
65
63.1
19.95
22.05
43
41
M48
5
163
148
49
47
28.95
31.05
1.6
75
73.1
22.95
25.05
49
47
M56
5.5
172.5
156
57.2
54.8
33.75
36.25
2
85
82.8
26.95
29.05
57.2
54.8
M64
6
182
164
65.2
62.8
38.75
41.25
2
95
92.8
30.75
33.25
65.2
62.8
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