Hot-dip galvanized structural hex bolts are high-strength fasteners with a hot-dip galvanized coating. They are mainly used for load-bearing structural connections and are widely applied in construction, infrastructure, and heavy industry.
Product Parameters
|
Drive Style |
Heavy Hex Head Bolts |
|
Screw Features |
Heavy Hex |
|
System of Measurement |
Metric |
|
Thread Direction |
Right Hand |
|
Threading |
Partially threaded |
|
Thread Fit |
Class 2A |
|
Thread Spacing |
Coarse |
|
Grade/Class |
ASTM A490M Type1 |
|
Material |
Alloy steel |
|
Standard |
ASME B18.2.6 |
|
Finish |
HDG |
|
Coat thickness |
50-65μm |
|
RoHS |
RoHS 3 (2015/863/EU) Compliant |
|
Country of Origin |
China |
Product Drawing
|
Metric heavy hex screws |
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|
ASME/ANSI B18.2.6M |
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|
|
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|
d(mm) |
P(mm) |
b(mm) |
ds(mm) |
k(mm) |
s(mm) |
||||
|
L≤100 |
L>110 |
min |
max |
min |
max |
min |
max |
||
|
M12 |
1.75 |
25 |
25 |
11.3 |
12.7 |
7.05 |
7.95 |
20.16 |
21 |
|
M16 |
2 |
31 |
31 |
15.3 |
16.7 |
9.25 |
10.75 |
26.16 |
27 |
|
M20 |
2.5 |
36 |
36 |
19.16 |
20.84 |
11.6 |
13.4 |
33 |
34 |
|
M22 |
2.5 |
38 |
38 |
21.16 |
22.84 |
13.1 |
14.9 |
35 |
36 |
|
M24 |
3 |
41 |
41 |
23.16 |
24.84 |
14.1 |
15.9 |
40 |
41 |
|
M27 |
3 |
44 |
44 |
26.16 |
27.84 |
16.1 |
17.9 |
45 |
46 |
|
M30 |
3.5 |
49 |
49 |
29.16 |
30.84 |
17.65 |
19.75 |
49 |
50 |
|
M36 |
4 |
61 |
66 |
35 |
37 |
21.45 |
23.55 |
58.8 |
60 |
Product Features
1. High Strength: Bolts meeting the A325 standard have high strength, making them suitable for structural connections.
2. Corrosion Resistance: The hot-dip galvanized coating provides excellent corrosion resistance.
3. Wide Applicability: Suitable for buildings, bridges, steel structures, and other scenarios.
4. Customization: Length and other specifications can be customized according to customer needs.
Installation & Safety
1. Proper Torque:
Hot-dip galvanized bolts should be tightened to the manufacturer's recommended torque specifications to ensure a secure connection. Over-tightening or under-tightening can result in structural damage.
2. Thread Lubrication:
Lubricate threads to prevent galling (friction-related damage) during installation, especially when using stainless steel or other materials that are difficult to tap.
3. Inspection:
Regular inspections are essential to ensure the integrity of fasteners, especially in extreme environments. Galvanized bolts should be checked for coating damage or thread issues.
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