The head of the square head square neck anchor bolts is square, and so is the neck. The square head design provides a large contact area for the wrench, ensuring more stable force application. It is particularly practical in scenarios that require strong torque and anti-slip measures.
Mon
M16
M20
M24
M30
M36
M42
M48
M56
M64
P
2
2.5
3
3.5
4
4.5
5
5.5
6
b max
122
127.5
133
140.5
148
155.5
163
172.5
182
b min
116
120
124
130
136
142
148
156
164
ds max
16.7
20.84
24.84
30.84
37
43
49
57.2
65.2
ds min
15.3
19.16
23.16
29.16
35
41
47
54.8
62.8
k min
9.25
11.6
14.1
17.65
21.45
24.95
28.95
33.75
38.75
k max
10.75
13.4
15.9
19.75
23.55
27.05
31.05
36.25
41.25
r min
0.6
0.8
0.8
1
1
1.2
1.6
2
2
s max
24
30
36
46
55
65
75
85
95
s min
23.16
29.16
35
45
53.8
63.1
73.1
82.8
92.8
k1 min
7.25
9.25
11.1
14.1
17.1
19.95
22.95
26.95
30.75
k1 max
8.75
10.75
12.9
15.9
18.9
22.05
25.05
29.05
33.25
s1 max
16.7
20.84
24.84
30.84
37
43
49
57.2
65.2
s1 min
15.3
19.16
23.16
29.16
35
41
47
54.8
62.8
Square head square neck anchor bolts refer to the firm bolts embedded before the concrete solidifies. After the concrete hardens, the square neck will lock the bolts in place to prevent them from rotating when the nuts are tightened later. They are foundations that directly anchor heavy objects such as columns, machines or structural steel to the concrete foundation.
The anchor bolts are firmly installed. When you tighten the nut, the square neck will be tightly clamped in the installed material, such as concrete or wood, to prevent the bolt from rotating along with the nut. This way, the fixed object can stay firmly in place and will not shake or shift easily.
The installation of this metric anchor bolt is carried out during the concrete pouring process. You can use templates or fixtures to position them, making sure the threaded ends are facing upwards. The key step is to embed the square neck part into the wet concrete. As the concrete solidifies around the square neck, it will firmly grasp the square neck. After that, you just need to place the item on the bolt and then tighten the nut to the exposed thread.
The square head square neck anchor bolts are shock-resistant. Because the bolts are physically locked into the concrete by the hardened material surrounding the square neck, they are less likely to loosen due to vibration or movement.This enables them to reliably anchor vibrating machinery or structures subject to dynamic loads such as wind or traffic.