Haihao Group Ships PTFE Coated Stud Bolts and Nuts to UK Client
Haihao Group recently completed the production and delivery of a batch of PTFE coated stud bolts with heavy hex nuts for a customer in the United Kingdom. These fasteners are designed for flange connection systems in industrial pipelines, where corrosion resistance and reliable mechanical strength are essential.
The supplied stud bolts are manufactured according to ASTM A307 Grade B, paired with ASTM A194 Grade 2H nuts. Both the bolts and nuts are coated with PTFE (Polytetrafluoroethylene) to enhance corrosion resistance and improve installation performance in demanding environments.

PTFE coated stud bolts with ASTM A194 Gr 2H nuts
Order Details: PTFE Coated Stud Bolts
The UK customer ordered two specifications of PTFE coated stud bolts with two heavy hex nuts, commonly used in flange assemblies.
Product Specifications
1. PTFE Coated Stud Bolt Assembly
- Bolt Material: ASTM A307 Grade B
- Nut Material: ASTM A194 Grade 2H
- Size: 1″ × 250 mm
- Configuration: Stud bolt with two nuts
- Coating: PTFE coating on bolts and nuts
2. PTFE Coated Stud Bolt Assembly
- Bolt Material: ASTM A307 Grade B
- Nut Material: ASTM A194 Grade 2H
- Size: 7/8″ × 200 mm
- Configuration: Stud bolt with two nuts
- Coating: PTFE coating on bolts and nuts
These PTFE coated stud bolt assemblies are widely used in flange connections for pipelines, valves, and pressure vessels.
Benefits of PTFE Coated Stud Bolts
Using PTFE coated bolts and nuts provides several advantages in industrial piping systems.
Excellent Corrosion Resistance
PTFE coating protects fasteners from moisture, chemicals, and corrosive environments, extending service life.
Improved Installation Performance
The PTFE layer reduces friction, allowing smooth tightening and easier installation during flange assembly.
Enhanced Anti-Seizing Properties
PTFE coating prevents thread galling and seizure, which is especially important in high-load flange connections.
Reliable Performance in Harsh Environments
These fasteners are suitable for use in chemical plants, offshore facilities, and oil and gas pipelines.
Applications of PTFE Coated Stud Bolts
The PTFE coated stud bolts supplied to the UK project are widely used in industrial sectors such as:
- Oil and gas pipeline systems
- Petrochemical plants
- Offshore engineering projects
- Power generation facilities
- Industrial equipment and pressure vessels
Their corrosion-resistant properties make them ideal for flange connections exposed to aggressive environments.
Haihao Group – Reliable Supplier of Industrial Fasteners
Haihao Group is a professional manufacturer and exporter of pipeline components including flanges, pipe fittings, steel pipes, and industrial fasteners. Our products are manufactured according to international standards such as ASTM, ASME, EN, and DIN, ensuring quality and compatibility with global engineering projects.
With strict quality control and extensive export experience, Haihao Group continues to provide reliable pipeline fastening solutions for customers around the world.
If you are looking for a trusted supplier of PTFE coated stud bolts and nuts for flange connections, Haihao Group is ready to support your project with high-quality products and professional service.

