Haihao Group Supplies Stainless Steel Fasteners for Pipeline Accessories to Singapore

Haihao Group recently completed the shipment of a comprehensive range of pipeline fastening components for a customer in Singapore. The order covered stainless steel bolts, nuts, washers, socket screws, and clevis pins, supplied in multiple sizes and standards to support on-site installation and maintenance of piping systems.

All products were manufactured in accordance with DIN and ISO standards, ensuring dimensional accuracy, mechanical strength, and long-term service reliability.

A4 80 stainless steel bolts, nuts, washers and clevis pins manufactured by Haihao Group for pipeline accessories in Singapore

Supplied Fastener Range

The shipment included a wide variety of fastener types to meet different assembly requirements:

• Hex head bolts (full thread and partial thread)
• Hex socket head bolts and socket screws
• Hex nuts and lock nuts
• Flat washers and spring lock washers
• Clevis pins with head

Sizes ranged from M5 to M20, allowing compatibility with different pipeline supports, flange connections, and auxiliary structures.

Materials and Surface Treatment

Most fasteners were supplied in A4-80 stainless steel, known for its:

• Excellent corrosion resistance
• High tensile strength
• Suitability for humid, marine, and industrial environments

In addition, selected washers and lock nuts were provided with hot-dip galvanized Class 8.8 finish, offering enhanced protection against corrosion in outdoor or structural applications.

Standards Compliance

All fasteners were produced strictly in accordance with international standards, including:

• DIN 931 / DIN 933 – Hex head bolts
• DIN 912 / DIN 7991 / ISO 7380 – Hex socket and socket head bolts
• DIN 439 / ISO 10511 – Nuts and lock nuts
• DIN 9021 / DIN 128 – Flat washers and spring washers
• ISO 2341 B – Clevis pins with head

This guarantees interchangeability, safety, and ease of installation across global pipeline projects.

Applications in Pipeline Systems

These stainless steel fasteners for pipeline accessories are widely used in:

• Pipe support and bracket systems
• Valve and equipment mounting
• Auxiliary steel structures
• Maintenance and retrofit works

The combination of A4-80 stainless steel fasteners and galvanized components makes them suitable for both indoor and outdoor service conditions.

Your Trusted Fastener and Piping Accessories Supplier

With extensive experience supplying fasteners, flanges, fittings, and complete piping accessories, Haihao Group supports customers worldwide with consistent quality and reliable delivery.

Whether for standard fasteners or customized combinations, we provide engineering-grade solutions tailored to project requirements.