We are pleased to have received a order from one of our long-term and valued clients for stud bolts and nuts. The order includes SB2N stud bolts made from ASTM A320 Grade B8 stainless steel with UNC threads, in two specifications: 100 mm (5/8″, 30 sets) and 130 mm (3/4″, 48 sets). Each set is paired with two heavy hex nuts manufactured in accordance with ASTM A194 Grade 8.
As a professional manufacturer of bolts and nuts, we specialize in producing high-quality fasteners that meet international standards such as ASTM, ASME, and BS. With decades of industry experience, our advanced production facilities and strict quality control processes ensure every product delivers exceptional durability, precision, and reliability.
Our products have gained wide popularity among customers both at home and abroad. And they are widely used in critical industries including oil and gas, petrochemical, power generation, and heavy machinery. We offer a wide range of customizable solutions, from standard specifications to unique designs tailored to your project needs. Customization is available upon request. Please feel free to contact us, we look forward to establishing more partnerships around the world.
Product Descriptions
| Descriptions | Thread Type | Length | Size | Quantity Unit | Quantity |
| Specification Model: SB2N,320-B8 Stud Bolt Material Standard: ASTM A320 GRADE B8 Nut Material Standard: ASTM A194 GRADE 8 Design Standards: BS 4882, ASME B18.2.2 Description: Stud bolt, heavy hex nuts ×2 | UNC | 100 MM | 5/8 IN | SET | 300 |
| Specification Model: SB2N, A320-B8 Stud Bolt Material Standard: ASTM A320 GRADE B8 Nut Material Standard: ASTM A194 GRADE 8 Design Standards: BS 4882, ASME B18.2.2 Description: Stud bolt, heavy hex nuts ×2 | UNC | 130 MM | 3/4 IN | SET | 480 |
ASTM A320 B8 Stud Bolts Chemical Composition
| Carbon | 0.08% max |
| Manganese | 2.00% max |
| Phosphorus, max | 0.045% |
| Sulfur, max | 0.030% |
| Silicon | 1.00% max |
| Chromium | 18.0 – 20.0% |
| Nickel | 8.0 – 11.0% |
ASTM A320 B8 Stud Bolts Mechanical Properties
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
| B8 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 |
ASTM A194 GRADE 8 Nuts Chemical Composition
| Element | ASTM A194 Grade 8 |
| Carbon | 0.08 max |
| Manganese | 2.00 Max |
| Phosphorus, max | 0.05% |
| Sulfur, max | 0.03% |
| Silicon | 1.00% max |
| Chromium | 18.0 – 20.0% |
| Nickel | 8.0 – 11.0% |
| Molybdenum | – |
ASTM A194 GRADE 8 Nuts Mechanical Properties
| Property | Value |
| Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa) | 550 |
| Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa) | 240 |
| Elongation in 4D (Ei) | 30 |
| Reduction | 40 |
| Hardness – (BHN) | 223 |
ASTM A320 B8 Stud Bolts with A194 Gr.8 Nuts Pictures
Our bolts and nuts are made with high-quality materials and meet international standards. The threads are precisely made to fit nuts perfectly, so they hold strong in any use. They resist rust well and last a long time, making them your best choice. Custom sizes and specifications are available upon request. If you require any assistance or further information, please contact us at your convenience.
ASTM A320 B8 Stud Bolts with A194 Gr.8 Nuts Packages
We use durable wooden boxes to package ASTM A320 B8 stud bolts with A194 Gr.8 nuts. These boxes provide several key advantages, offering excellent protection against impact, vibration, and environmental stress during transportation. And their strong load-bearing capacity ensures the safe and efficient delivery of fasteners, even in large quantities.
