Structural heavy hex bolts are high-strength fasteners designed for critical load-bearing applications in construction, infrastructure, and industrial machinery. Their robust design, large hexagonal head, and high-strength threads make them ideal for connecting structural components such as steel beams, bridges, or heavy equipment-where safety, durability, and resistance to shear and tension are critical, as they can withstand the stresses and forces exerted on structures like buildings, bridges, and machinery.
Product Parameters
|
Drive Style |
Heavy Hex Head Bolts |
|
Screw Features |
Heavy Hex |
|
System of Measurement |
Inch |
|
Thread Direction |
Right Hand |
|
Threading |
Fully threaded and partially threaded |
|
Thread Fit |
Class 2A |
|
Thread Spacing |
Coarse |
|
Grade/Class |
ASTM A325 Type1 |
|
Material |
Medium carbon steel |
|
Standard |
ASME B18.2.6 |
|
Finish |
HDG |
|
RoHS |
RoHS 3 (2015/863/EU) Compliant |
|
Country of Origin |
China |
Product Drawing
|
Heavy hex structural bolts |
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|
ASTM A325/ A490 ASME/ANSI B18.2.6-2011 |
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|
|
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|
d(inch) |
1/2 |
5/8 |
3/4 |
7/8 |
1 |
1-1/8 |
1-1/4 |
1-3/8 |
1-1/2 |
|
|
P(inch) |
13 |
11 |
10 |
9 |
8 |
7 |
7 |
6 |
6 |
|
|
ds(inch) |
min |
0.482 |
0.605 |
0.729 |
0.852 |
0.976 |
1.098 |
1.223 |
1.345 |
1.47 |
|
max |
0.515 |
0.642 |
0.768 |
0.895 |
1.022 |
1.149 |
1.277 |
1.404 |
1.531 |
|
|
s(inch) |
Nom |
7/8 |
1-1/16 |
1-1/4 |
1-7/16 |
1-5/8 |
1-13/16 |
2 |
2-3/16 |
2-3/8 |
|
min |
0.85 |
1.031 |
1.212 |
1.394 |
1.575 |
1.756 |
1.938 |
2.119 |
2.3 |
|
|
max |
0.875 |
1.062 |
1.25 |
1.438 |
1.625 |
1.812 |
2 |
2.188 |
2.375 |
|
|
e(inch) |
min |
0.969 |
1.175 |
1.383 |
1.589 |
1.796 |
2.002 |
2.209 |
2.416 |
2.622 |
|
max |
1.01 |
1.227 |
1.443 |
1.66 |
1.876 |
2.093 |
2.309 |
2.526 |
2.742 |
|
|
k(inch) |
Nom |
5/16 |
25/64 |
15/32 |
35/64 |
39/64 |
11/16 |
25/32 |
17/32 |
15/16 |
|
min |
0.302 |
0.378 |
0.455 |
0.531 |
0.591 |
0.658 |
0.749 |
0.81 |
0.902 |
|
|
max |
0.323 |
0.403 |
0.483 |
0.563 |
0.627 |
0.718 |
0.813 |
0.878 |
0.974 |
|
|
b(inch) |
Ref. |
1 |
1.25 |
1.38 |
1.5 |
1.75 |
2 |
2 |
2.25 |
2.25 |
Advantages
1. High Strength and Durability:
Structural heavy hex bolts are designed to withstand high stresses and heavy loads, ensuring strong structural connections even under extreme conditions.
2. Versatility:
They are suitable for a wide range of applications, from construction to industrial machinery, and are available in various sizes and material strengths to meet specific needs.
3. Easy Installation:
The hexagonal head design allows for easy installation and tightening using standard tools such as wrenches or impact drivers.
4. Corrosion Resistance:
Coated or stainless steel versions are corrosion-resistant, making them suitable for outdoor or marine environments. Without such protection, exposure to moisture and harsh conditions may degrade the fasteners' performance.
5. High Load Capacity:
These bolts are carefully designed to withstand large tensile, shear, and fatigue forces, making them an ideal choice for applications requiring long-term reliability.
Safety Precautions
1. Inspection: Regularly check for looseness, corrosion, or thread damage, especially in high-vibration environments (e.g., machinery, bridges).
2. Material compatibility: Avoid mixing dissimilar metals (e.g., steel bolts and aluminum parts) to prevent galvanic corrosion.
3. Proper size: Using undersized bolts may fail under load; consult engineering specifications for the correct size and grade.
Applications
1. Construction: Connecting steel beams, columns, and trusses in buildings, stadiums, and industrial facilities.
2. Infrastructure: Assembling bridges, roads, and railway tracks (with resistance to vibration and dynamic loads).
3. Heavy machinery: Securing components in cranes, bulldozers, and industrial presses (withstanding high shear forces).
4. Oil and gas: Fastening pipeline flanges, offshore platforms, and drilling equipment (resistant to corrosion and extreme pressure).
5. Mining: Securing structural supports in mines (resistant to dust, moisture, and heavy impacts).
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