M45 Stainless Steel Hex Bolts with Self-Locking Heavy Hex Nuts for Refinery Fasteners

Heat-treated fasteners designed for refinery applications with weight varying by size. These precision-engineered bolts and nuts provide secure fastening solutions for demanding industrial environments.

Our metric thread bolts and nuts are constructed from stainless steel, offering exceptional corrosion resistance and durability. The product line includes duplex stainless steel S31803 bolts and nuts, combining austenitic and ferritic properties for superior mechanical strength and stress corrosion cracking resistance.

Our product range includes specialized fasteners for specific applications:

• ASTM A194 2HM nuts for hydrogen service applications
• DIN 934 hex nuts with zinc plating for general-purpose use
• ASTM A354 Grade BD alloy steel bolts for enhanced strength
• ASTM A325 Type 1 structural bolts with heavy hex nuts

These self-locking fasteners maintain secure connections under vibration and dynamic loads, making them ideal for:

• Refinery and petrochemical applications
• Structural frameworks and heavy machinery
• Automotive assembly and aerospace components
• Marine equipment and electrical panel installations
• Chemical processing and oil & gas industries

We offer extensive customization to meet your specific requirements:

• Customizable hole diameter and small hole diameter
• 2 nuts per set with A4-70 mechanical characteristics
• Multiple size options from M20 to M45
• Specialized bolt types including ASTM A449 and A193 B16

Contact our technical team for custom solution consultations

Comprehensive technical support including installation guides, maintenance tips, and compatibility information. Our technical team provides assistance with product specifications, load capacities, and material properties.

Additional services include troubleshooting advice, replacement policies, and warranty information to ensure optimal performance in your applications.