Big bolts generally means high strength bolts with diameters exceeding 1 inch, and even can reach up to M300 in diameter and several meters in length. While there are many manufacturers in the market capable of producing large fasteners, few have the experience and technical capability to produce truly high quality big bolts. In reality, many big bolts fail to meet the required strength levels because the material composition ratio for each bolt is very important and need engineer’s rich experience.
Looking for a Reliable big bolt Manufacturer in USA? After done many researches, we’ve compiled a list of the top 10 suppliers that provide stable and reliable quality. Let’s take a closer look!
FastenMetalis one of the best big bolt manufacturers in China. We produce large bolts ranging from M45 to M300, with lengths from 30 cm up to 3 meters and strength grades up to 12.9 . We also manufacture special big bolts and extra long bolts according to customer drawings , fully meeting the structural connection requirements under extreme operating conditions. We use premium alloy steels such as 42CrMo, B7, L7, and stainless steels, and our team is highly experienced in heat treatment processes including quenching, tempering, and normalizing. This ensures that every bolt meets or exceeds international standards (ASTM A193, ASTM A320, ASTM A490) and Chinese national standards (GB/T). As a result, our bolts offer exceptional tensile strength, yield strength, and fatigue resistance, apply for heavy construction, energy, and industrial applications. If you are looking for a high quality bolts manufacturer in China at a reasonable price, FastenMetal will be your best choice.
Top 10 Giant / Large Bolt Manufacturers and Suppliers in the USA
This list includes not only pure manufacturers but also top suppliers and distributors offering deep processing and customized engineering services. In the U.S. market, many large-scale fastener solutions are provided by these companies with strong technical and manufacturing capabilities.
1. Portland Bolt & Manufacturing Company
Highlights: A benchmark in the U.S. for large, high strength bolt production. Specializes in bolts, studs, anchor bolts, and nuts from ½ inch to 4 inches and above in diameter. Their products are widely used in bridges, stadiums, power plants, and wind energy projects, well-known for strict compliance with ASTM and AISC standards.
2. Nucor Fastener
Highlights: A subsidiary of Nucor, the largest steel producer in the U.S. As a Tier-1 manufacturer starting from raw steel, Nucor produces a wide range of standard and high strength heavy bolts, studs, and anchor rods. Their strong raw material supply chain gives them a significant advantage in large scale project deliveries.
3. Gulf Coast Fasteners
Highlights: Though primarily a distributor, they are highly influential in the large and specialty fastener sector, focusing on oil & gas, marine, and construction industries. They supply bolts up to 4 inches in diameter and over 20 feet in length, backed by strong engineering support for custom solutions.
4. B&G Threading
Highlights: A specialist manufacturer focused on threading, heat treatment, and custom production of large bolts. They are experts in handling oversized fasteners that others cannot, serving mining, construction, and heavy industry sectors.
5. Burnsco Bolt
Highlights: With over 75 years of history, Burnsco produces high strength large bolts, studs, U bolts, and anchor bolts, offering hot-dip galvanizing and other protective finishes. Their products are commonly used in transmission towers, bridges, and heavy equipment manufacturing.
6. ABBOTT
Highlights: A long established U.S. manufacturer known for its INTERLOCK and REDI BOLT brands of heavy duty bolts and tension control systems. Their products are widely applied in wind turbine flanges, pressure vessels, and large machinery where precise preloading is required.
7. Cameron (a brand of SLB)
Highlights: In the oil and gas industry, Cameron is a top-tier brand. They produce giant bolts and stud bolts used in blowout preventers, wellhead equipment, and high-pressure manifolds, where extreme strength and pressure resistance are essential.
8. Dyson Corp.
Highlights: A leading U.S. manufacturer of anchor bolts and large fasteners, especially known for its hot forging process. Their product line includes anchor bolts, J-bolts, and hook bolts up to 4 inches in diameter, widely used in construction and infrastructure projects.
9. Carrillo Sales
Highlights: A well known supplier/manufacturer specializing in heavy and oversized fasteners, particularly strong in the western and southwestern U.S. They provide large bolts and customized fastening solutions for mining, construction, and utility projects.
10. Bolt & Nut Supply Co.
Highlights: A large fastener distributor with multiple branches in the western U.S. In addition to distribution, they offer in depth machining and customization services, capable of producing non standard large bolts according to industrial clients’ specific needs.
| # | Company | City | State / Country | Year founded | Size (No. employees) | Annual sales (estimate) |
|---|---|---|---|---|---|---|
| 1 | Portland Bolt & Manufacturing Company | Portland | Oregon, USA | 1912 | ~120 | ~$51M |
| 2 | Nucor Fastener (Nucor / St. Joe facility) | St. Joe | Indiana, USA | 1986 (Nucor entered fastener market) | ~100 | ~$32.1M (est.) |
| 3 | Gulf Coast Fasteners, Inc. | Houston / Waller | Texas, USA | 1968 (incorporation date listed) | N/A | N/A |
| 4 | B&G (B&G Manufacturing / B&G Threading) | Hatfield | Pennsylvania, USA | ~1945 (est. on industry listings) | N/A (mid-sized) | $25–50M (revenue bracket on ThomasNet) |
| 5 | Burnsco / Burnsco (name overlap) | Auckland | New Zealand | ~1882 (Burnsco timeline) | N/A | N/A |
| 6 | Abbott (Abbott-Interfast / Abbott Metal Werks / Abbott Interfast) | Wheeling (and multiple sites) | Illinois / USA (varies by Abbott entity) | ~50+ years (industry descriptions) | N/A | N/A |
| 7 | Cameron (brand of SLB / formerly Cameron International) | Houston | Texas, USA | 1920 | ~24,000 (Cameron when part of SLB; global) | ~$9.8B (historic company revenue prior to SLB consolidation) |
| 8 | Dyson Corp. (fasteners & forgings) | Streetsboro / Ohio area (US listing) | Ohio, USA | 1972 (one company profile) | ~80–150 (various directory estimates) | ~$70–80M (directory estimate) |
| 9 | Carrillo Sales / CP-Carrillo (related Carrillo fastener brand) | Irvine / California (CP-Carrillo) | California, USA | ~1970s / 1970s–1980s (CP-Carrillo history ~50 yrs) | N/A (small/medium specialty manufacturer) | N/A |
| 10 | Bolt & Nut Supply Co. (regional distributor) | Salt Lake City / Midvale / West Valley City | Utah, USA | ~1980s–1990s (40+ years on site) | ~20–50 (small chain) | ~$5–10M (directory range for similar distributors) |
FAQ:How to Choose the Right Supplier?
With so many top tier suppliers, choosing the right one can be challenging. Here are a few main factors to evaluate whether a supplier meets your project needs:
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Standards & Certifications:Does your project require compliance with specific international (ASTM) or regional (GB) standards? Does the supplier hold the necessary qualifications and certifications?
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Technical & Engineering Support:This is crucial. Can the supplier offer customized design based on your requirements? Do they have an experienced team providing bolt load calculations, installation guidance, and technical support?
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Supply Chain & Delivery:Does the supplier have sufficient capacity and reliable lead times to meet your project schedule?
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Cost Considerations:Beyond reliable quality, product pricing and logistics costs are also key factors to balance when selecting your partner.
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Conclusion:
The United States is the world’s largest importer of fasteners. Each year, it imports a large volume of fasteners from countries such as China, Taiwan, and Germany. The USMCA agreement between the United States, Canada, and Mexico has further strengthened fastener trade among the three countries.
Do you have a project requiring big bolts? Get Your Solution Here.Fastenmetal specializes in manufacturing oversized and non standard bolts for important industries. Let our engineers provide you with a custom solution. Reach out to us for expert support and a competitive quote.
