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Brian Fasteners, Houston, USA, is a renowned manufacturer and supplier of high-quality ASTM A193 B7 Nuts. With international standard quality products and precision engineering, Brian Fasteners caters to various industries such as oil & gas, petrochemical, and power generation. Equipped with state-of-the-art manufacturing facilities and following rigorous quality control measures, the company provides reliable fastening solutions that are capable of performing under high pressure and harsh climate conditions. Their ASTM A193 B7 Nuts enjoy broad recognition for strength, dependability, and resistance to corrosion and are thus a go-to partner for industrial-grade bolting applications across the United States and internationally.
ASTM A193 B7 Nuts are made of chromium-molybdenum steel, usually quenched and tempered to boost strength. Chemical composition involves carbon (max 0.50%), manganese (0.30–0.60%), phosphorus (max 0.04%), sulfur (max 0.05%), silicon (0.15–0.35%), and chromium (0.75–1.20%) with molybdenum (0.15–0.25%). Such nuts have high tensile strength (at least 125 ksi), high yield strength (105 ksi), and superior hardness, which makes them suitable for high-stress conditions. They offer superior mechanical properties for exceptional performance in both high and sub-zero temperatures, with long-term reliability and structural integrity in harsh industrial uses.
Material | Specification | Standards | Size | Length |
ASTM A193 B7 Nuts | IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | M 02 to M 160 | 3 mm to 200 mm |
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
| B7 | Up to 2-1/2 | 125 | 105 | 16 | 50 |
| 2-5/8 – 4 | 115 | 95 | 16 | 50 | |
| 4-1/8 – 7 | 100 | 75 | 18 | 50 | |
| B8 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M Class 1 | All | 75 | 30 | 30 | 50 |
| B8 Class 2 | Up to 3/4 | 125 | 100 | 12 | 35 |
| 7/8 – 1 | 115 | 80 | 15 | 35 | |
| 1-1/8 – 1-1/4 | 105 | 65 | 20 | 35 | |
| 1-3/8 – 1-1/2 | 100 | 50 | 28 | 45 |
| Element | B7 | B8 | B8M |
| Carbon | 0.37 – 0.49% | 0.08% max | 0.08% max |
| Manganese | 0.65 – 1.10% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.040% | 0.030% | 0.030% |
| Silicon | 0.15 – 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.75 – 1.20% | 18.0 – 20.0% | 16.0 – 18.0% |
| Nickel | 8.0 – 11.0% | 10.0 – 14.0% | |
| Molybdenum | 0.15 – 0.25% | 2.00 – 3.00% |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
ASTM A193 B7 Nuts find widespread applications under high-pressure and high-temperature service conditions. They are specifically suited to bolting together pressure vessels, valves, flanges, and fittings, particularly in petrochemical, oil & gas, power generation, and chemical processing applications. They are strong and long-lasting under stress, making them well-suited for refineries, offshore platforms, and pipe lines. In building and infrastructure, they make sound connections within structural assemblies that need heavy-load strength. Further, their corrosion resistance and thermal stability guarantee reliable performance in severe conditions with less possibility of failure and ensuring operational durability and safety.
Brian Fasteners ensures the secure packaging of ASTM A193 B7 Nuts for optimal protection and easy handling. Each nut is individually packed to prevent damage during transit and storage, with clear labeling for quick identification. Our packaging is designed to maintain the integrity of the nuts and facilitate efficient inventory management. Trust Brian Fasteners for meticulously packaged components, ensuring that your ASTM A193 B7 Nuts arrive in perfect condition, ready for reliable performance in your projects.
Brian Fasteners is a leading manufacturer and supplier of high-quality fasteners in Houston , USA, with over 8 years of experience serving global industries.
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