UNF Grade 8 Hex Bolts Zinc Plated

ASME B18.2.1 | Fine Thread | High Strength Fastening | NZ

When you need maximum clamping and zero compromise.

These UNF Grade 8 hex bolts are designed for high-strength, precision fastening in automotive, engineering, and structural applications. Manufactured to ASME B18.2.1, they deliver reliable performance where standard bolts simply aren’t enough.

The UNF (fine thread) profile provides greater clamping force and improved resistance to vibration, making them ideal for load-critical applications and assemblies that need to stay tight under stress.

Made from Grade 8 steel and finished with zinc plating and blue passivation (A2K), these bolts offer excellent strength along with corrosion resistance for everyday workshop and outdoor use.

Tighter threads. Stronger hold. Built for critical jobs.

Why We Use Them in the Workshop

• Grade 8 high tensile strength for demanding applications
• UNF fine thread for improved clamping force
• Better resistance to loosening under vibration
• Reliable performance in high-load environments
• Zinc plated for corrosion protection
• Consistent quality to ASME standard

Key Features

• Standard: ASME B18.2.1
• Material: Steel
• Grade: 8 (high strength)
• Finish: Zinc plated, blue passivated (A2K)
• Head Type: Hexagon
• Thread Type: UNF (fine thread)
• Thread Design: Full thread
• RoHS Compliant: Yes

Ideal For

• Automotive and performance builds
• Engine and suspension components
• Machinery and equipment
• Structural and load-critical fastening
• Engineering and fabrication work

Built for Precision & Strength

These UNF Grade 8 bolts NZ workshops rely on deliver the clamping force and reliability needed for critical applications where failure is not an option.