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Note: All data for information purpose only. For more details on product standards or dimensions or enquiry, please feel free to contact us at info@thefastenershouse.com
| Heavy Hex Bolts: Head & Thread Dimensions - Type A307, Grades A & B (ASME B18.2.1-1996) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal or Basic Product Diameter |
Body Diameter (E) | Width Across Flats (F) |
Width Across Corners (G) | Head Height (H) | Radius of Fillet (R) | Thread Length (LT) |
|||||||||
| Max | Min | Basic | Max | Min | Max | Min | Basic | Max | Min | Max | Min | >6" | |||
| 1/2 | .5000 | .515 | .482 | 7/8 | .875 | .850 | 1.010 | .969 | 11/32 | .364 | .302 | .03 | .01 | 1.250 | 1.500 |
| 5/8 | .6250 | .642 | .605 | 1-1/16 | 1.062 | 1.031 | 1.227 | 1.175 | 27/64 | .444 | .378 | .06 | .02 | 1.500 | 1.750 |
| 3/4 | .7500 | .768 | .729 | 1-1/4 | 1.250 | 1.212 | 1.443 | 1.383 | 1/2 | .524 | .455 | .06 | .02 | 1.750 | 2.000 |
| 7/8 | .8750 | .895 | .852 | 1-7/16 | 1.438 | 1.394 | 1.660 | 1.589 | 37/64 | .604 | .531 | .06 | .02 | 2.000 | 2.250 |
| 1 | 1.0000 | 1.022 | .976 | 1-5/8 | 1.625 | 1.575 | 1.876 | 1.796 | 43/64 | .700 | .591 | .09 | .03 | 2.250 | 2.500 |
| 1-1/8 | 1.1250 | 1.149 | 1.098 | 1-13/16 | 1.812 | 1.756 | 2.093 | 2.002 | 3/4 | .780 | .658 | .09 | .03 | 2.500 | 2.750 |
| 1-1/4 | 1.2500 | 1.277 | 1.223 | 2 | 2.000 | 1.938 | 2.309 | 2.209 | 27/32 | .876 | .749 | .09 | .03 | 2.750 | 3.000 |
| 1-3/8 | 1.3750 | 1.404 | 1.345 | 2-3/16 | 2.188 | 2.119 | 2.526 | 2.416 | 29/32 | .940 | .810 | .09 | .03 | 3.000 | 3.250 |
| 1-1/2 | 1.5000 | 1.531 | 1.470 | 2-3/8 | 2.375 | 2.300 | 2.742 | 2.622 | 1 | 1.036 | .902 | .09 | .03 | 3.250 | 3.500 |
| 1-3/4 | 1.7500 | 1.785 | 1.716 | 2-3/4 | 2.750 | 2.662 | 3.175 | 3.035 | 1-5/32 | 1.196 | 1.054 | .12 | .04 | 3.750 | 4.000 |
| 2 | 2.0000 | 2.039 | 1.964 | 3-1/8 | 3.125 | 3.025 | 3.608 | 3.449 | 1-11/32 | 1.388 | 1.175 | .12 | .04 | 4.250 | 4.500 |
| 2-1/4 | 2.2500 | 2.305 | 2.214 | 3-1/2 | 3.500 | 3.388 | 4.041 | 3.862 | 1-1/2 | 1.548 | 1.327 | .19 | .06 | 4.750 | 5.000 |
| 2-1/2 | 2.5000 | 2.559 | 2.461 | 3-7/8 | 3.875 | 3.750 | 4.474 | 4.275 | 1-21/32 | 1.708 | 1.479 | .19 | .06 | 5.250 | 5.500 |
| 2-3/4 | 2.7500 | 2.827 | 2.711 | 4-1/4 | 4.250 | 4.112 | 4.907 | 4.688 | 1-13/16 | 1.869 | 1.632 | .19 | .06 | 5.750 | 6.000 |
| 3 | 3.0000 | 3.081 | 2.961 | 4-5/8 | 4.625 | 4.475 | 5.340 | 5.102 | 2 | 2.060 | 1.815 | .19 | .06 | 6.250 | 6.500 |
ASTM A307 grade A heavy hex bolts are standardized fasteners made of carbon steel and are commonly used in construction and industrial applications where moderate strength and durability are required.
ASTM A307 grade heavy hex bolts find application in various industries and scenarios where moderate strength and durability are required. Here are some common applications:
Construction Industry: ASTM A307 grade heavy hex bolts are extensively used in the construction of buildings, bridges, and other structures. They are employed for fastening structural components such as beams, columns, and steel plates, providing reliable connections in building frameworks and infrastructure projects.
Machinery and Equipment Assembly: These bolts are utilized in machinery assembly across different industries, including manufacturing, agriculture, and mining. They secure components in industrial equipment, manufacturing machinery, and heavy machinery, ensuring stability and structural integrity in assembled equipment.
Wood Construction: ASTM A307 grade heavy hex bolts are commonly used in wood construction projects for joining wooden beams, posts, and frames. They provide strong and durable connections in timber structures such as wooden buildings, bridges, and decks.
Infrastructure Maintenance and Repair: In maintenance and repair projects, these bolts are used for replacing worn or damaged fasteners in existing structures and equipment. They help restore structural integrity and ensure the safety and longevity of infrastructure assets such as bridges, highways, and utility poles.
Utilities and Electrical Installations: ASTM A307 grade heavy hex bolts find application in utilities and electrical installations for securing components such as utility poles, electrical boxes, and cable trays. They provide reliable fastening in outdoor environments and ensure the stability of utility infrastructure.
Automotive and Transportation: These bolts are used in automotive manufacturing and repair for various applications, including securing chassis components, engine mounts, and suspension systems. They provide secure connections in vehicles subjected to dynamic loads and vibrations.
General Industrial Applications: ASTM A307 grade heavy hex bolts are widely employed in various industrial applications where moderate strength fasteners are required. They are used in assembly lines, machinery maintenance, and equipment fabrication across diverse industries to ensure secure and durable fastening.
Overall, ASTM A307 grade heavy hex bolts play a crucial role in numerous applications where reliable and sturdy fastening is essential for structural integrity, safety, and longevity.
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