ASTM A194 Heavy Hex Nut is a high-strength industrial fastener designed for critical applications involving high pressure and high temperature. It is manufactured to withstand extreme loads and is commonly paired with ASTM A193 stud bolts. Shanxi Xinshunda Flange Manufacturing Co., Ltd. produces to various standard grades including Grade 2H, Grade 7, and Grade 8M, following applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research, and safety (MSDS) information is available upon request.
Production Details
Our ASTM A193 bolts are produced using state-of-the-art CNC machinery to ensure every thread and hexagonal head meets precise engineering drawings. The raw materials undergo strict chemical composition analysis before entering the production line. Each fastener is subjected to rigorous surface inspection to ensure the absence of defects such as cracks, laps, or improper coating. The dimensional accuracy is verified using advanced measuring instruments, ensuring a perfect match with your mating flanges.
Product Feature and Application
Product Properties
- High tensile strength and yield strength.
- Excellent resistance to stripping and deformation.
- Larger bearing surface area compared to standard hex nuts.
- Suitable for high-temperature and high-pressure flanged joints.
Application
ASTM A194 Heavy Hex Nuts are widely used in the Oil & Gas industry for pipeline flange connections, Petrochemical processing equipment, Power Generation plants (including nuclear and thermal), and Pressure Vessels. They are essential components in structural engineering and heavy machinery where secure bolting is critical.
|
Parameter |
Specification |
|
Standard |
ASTM A194 / ASME SA-194 |
|
Product Type |
Heavy Hex Nut (HHN) |
|
Material Grades |
Grade 2H, Grade 4, Grade 7, Grade 8, Grade 8M (304/316 SS) |
|
Size Range |
1/4" to 4" (Metric M6 to M100) |
|
Thread Type |
UNC (Coarse), UNF (Fine), Metric (MM) |
|
Surface Finish |
Plain (Black), Zinc Plated, Hot Dip Galvanized (HDG), PTFE Coated |
|
Hardness |
Meets specific HRC requirements per grade (e.g., 2H: Rockwell C24-C35) |
|
Packing |
Plywood Cases, Pallets, or Custom Packaging |
Physical Properties
|
Property |
Value |
|
Proof Load Strength |
Complies with ASTM A194 requirements |
|
Hardness (Grade 2H) |
Rockwell C24 - C35 |
|
Operating Temp. |
Up to 500°F (260°C) depending on grade |
|
Density |
7.85 g/cm³ (Carbon Steel) |
QA & QC
Shanxi Xinshunda Flange Manufacturing Co., Ltd. maintains a strict Quality Control system. All ASTM A194 nuts undergo Spectroscopic analysis, Dimensional checks, and Mechanical property testing. Mill Test Certificates (EN 10204 3.1) are provided with every shipment.
Packing, Storage, Handling and Transportation
Products are packaged in standard plywood cases or wooden pallets to ensure safe arrival. Each package is labeled with product details, size, grade, and batch number. The product should be stored in a dry, ventilated warehouse to prevent corrosion. Avoid exposure to moisture and corrosive chemicals during storage and handling.
Strategic Partners with Shanxi Xinshunda
Over 15 years of experience serving 3,800+ customers from more than 70 countries worldwide, specializing in flanges and fasteners for the energy sector.
Hot Tags: astm a194 nut, China astm a194 nut manufacturers, suppliers, factory
