Astec Tube is a trusted supplier and manufacturer of structure bolts and high quality fasteners designed for durability and performance. We offer a wide variety of bolts in various grades, finishes etc. to suit the needs of modern steel structures. Our nuts and bolts ensure high strength and long life while meeting all global standards.
Structure bolts are heavy-duty fasteners used in bolted connections in steel structures to provide secure and reliable joints. Our high strength structural bolts are available in grades such as 8.8 and 10.9. The nominal size varies from 1/2 inch to 1½ inch and nominal length ranges up to over 6 inches. The permissible variations include -0.12 in for smaller sizes and up to -0.25 in for larger lengths. We offer them in finishes such as Black Oxide, Zinc Plating and Hot Dip Galvanized. The various types of bolts in steel structure include heavy hex bolts, anchor bolts and high tensile bolts. These bolts provide superior performance in dynamic and static load-bearing connections.
Steel structure bolts are used in bridges, buildings, towers, heavy machinery, power plants and other infrastructure projects. Anchor bolts in steel structures are used to fix elements to concrete, while ASTM A325 structural heavy hex bolts and nuts are ideal for connecting large steel members. These bolts ensure rigidity and resistance to vibration which makes them vital in high-stress zones. They are also used in industrial sheds, pipelines and offshore platforms where reliability is key.
The bolts meet the standards of IS 3757, DIN 6914, ASTM A325M and IS0 7412. The mechanical properties are equivalent to structural bolts grades 8.8 and 10.9 as classified under IS 1367 or ISO 898. Standards ensure a level of consistency in performance and compatibility. Our high strength bolts for steel structures are in accordance with these norms to ensure safety and reliability.
All high tensile structural bolts go through strict quality checks. Our quality assurance team ensure every batch is compliant to International standards like ASTM A563 or ASTM A194. As one of the top structural bolts manufacturers in India, we inspect every aspect of every bolt including tensile strength and thread precision for many structural bolt grades used in infrastructure development around the world.
We follow rigorous quality checks to ensure any product we produce meets international performance expectations. Our design follow ASME B31.1, ASME B31.3 and ASME section VIII for pressure vessels. We are certified to ISO 9001, ASQC Q-92 and CAN3 Z299 quality requirements. All of our support components including pipe support clamps and b line pipe supports are manufactured and tested to ANSI B18.2.3. This ensures reliable pipe support standards and durable performance in extreme applications and conditions.
We provide MS pipe support for heavy-duty usage and stainless-steel pipe supports for corroded areas, offering solutions that are strong, low-cost and low-maintenance. Our supply chain makes us a trusted source for adjustable pipe support India and global piping projects.
| Nominal Length, in. | Nominal Size, in. | |||
|---|---|---|---|---|
| 1/2 | 5/8 | 3/4 thru 1 | 11⁄8 thru 11⁄2 | |
| Thru 6 in. | -0.12 | -0.12 | -0.19 | -0.25 |
| Over 6 in. | -0.19 | -0.25 | -0.25 | -0.25 |
Heavy Hex Structural Bolt
Tensile Bolt Structure
ASTM 490 Bolt
Structural Anchor Bolt
Structural Turned Bolt
ASTM 325 Bolt
Hex Bolts (Hex Head Bolts)
Tension Control Bolts (TC Bolts)
Heavy Hex Bolts
Carriage Bolts
Anchor Bolts
U-Bolts
Eye Bolts
Flange Bolts
Material Standards of Structural Steel Bolts