High-Quality A4-80 Stainless Steel Fasteners Supplied by Haihao Group
When it comes to ensuring secure, long-lasting connections in demanding environments, high-quality stainless steel fasteners are essential. Haihao Group recently supplied a comprehensive batch of A4-80 stainless steel fasteners for a domestic customer, covering a wide range of bolt, nut, and washer types in accordance with international standards such as DIN, ISO, and ASME.

ASTM A36 structural steel-bolts and nuts-pipeline products
Why Choose A4-80 Stainless Steel Fasteners?
A4-80 is a high-strength stainless steel grade containing molybdenum (typically Type 316), offering excellent resistance to corrosion, especially in marine and chemical environments. With a minimum tensile strength of 800 MPa, A4-80 fasteners are ideal for high-stress, outdoor, and offshore applications.
Key Benefits:
Superior corrosion resistance (ideal for saltwater and chemical exposure)
High tensile strength
Excellent performance in extreme temperatures
Compliance with international DIN/ISO standards
Fasteners Delivered by Haihao Group
Here’s a breakdown of some of the key components provided:
Hex Head Bolts – DIN 933 & DIN 931 (Full and Partial Thread)
Sizes: M5 to M12
Material: A4-80 Stainless Steel
These bolts are commonly used in structural and mechanical assemblies. Their full or partial threading allows for strong and adjustable fastening.
Hex Socket Head Cap Screws – DIN 912
Sizes: M6 to M20
Features: High torque capability and space-saving installation
Perfect for machinery where recessed heads are needed, these bolts provide clean aesthetics and powerful tightening.
Hex Lock Nuts & Standard Nuts – DIN 934, DIN 439, ISO 10511
Sizes: M5 to M16
Material: A4-80
Use Case: Locking applications, anti-vibration environments
Washers – DIN 125, DIN 9021, DIN 128
Types: Flat washers, spring lock washers
Applications: Distributing load, preventing loosening
Special Components for Niche Requirements
Eye Bolts DIN 580 – for lifting and rigging
Grease Nipples DIN 71412 – for lubrication systems
Circlips DIN 471 – for shaft retention
Clevis Pins ISO 2341 – for mechanical joints
Plugs DIN 908 – for sealing tapped holes
Split Pins ISO 1234 – for locking nut assemblies
W-Clips & Fastening Accessories – including custom 316L components
Applications of Haihao Group Fasteners
Haihao Group’s A4-80 fasteners are ideal for:
- Marine equipment
- Petrochemical plants
- Food processing machinery
- Pharmaceutical industry
- Renewable energy systems
- Heavy-duty mechanical assemblies
With precision manufacturing, reliable quality control, and compliance with DIN, ISO, and ASME standards, our fasteners deliver both performance and durability.
Why Work With Haihao Group?
As a leading supplier of industrial piping and fastening solutions, Haihao Group combines:
- Over 40 years of manufacturing experience
- Global export capabilities
- Full traceability (MTCs, dimensional reports, NDT as needed)
- Competitive pricing with quick lead times
If you’re sourcing high-quality A4-80 stainless steel fasteners for your next project, contact Haihao Group today to get a reliable solution tailored to your needs. Email:sales@haihaogroup.com