Product Overview
Our Grade 8.8 Nuts are high-strength carbon steel fasteners with black oxide coating, providing excellent rust resistance and wear durability. These products strictly comply with GB/T 3098.2 standards and are suitable for fastening requirements in machinery, construction, automotive, and power equipment industries.
Technical Specifications
| Material Standard | High Quality Carbon Steel (GB/T 700 Q235 or equivalent) |
| Tensile Strength | ≥800 MPa |
| Yield Strength | ≥640 MPa |
| Hardness Range | HRC 22-32 |
| Surface Treatment | Black Oxide Coating |
| Salt Spray Test | 24-48 hours (Basic rust protection) |
| Available Sizes | M6, M8, M10, M12, M14, M16, M18, M20, M22, M24 |
Application Scenarios
Grade 8.8 nuts are commonly used in industries requiring high tensile strength and reliable fastening solutions:
Steel Construction
Fastening structural steel components, beams, and plates
Machinery Assembly
Heavy-duty equipment, press machines, and engine frames
Automotive Industry
Vehicle chassis, engines, and suspension systems
Power & Energy Sector
Wind, solar, and mechanical mounting systems
General Industrial Use
Anywhere requiring high tensile strength and reliability
Frequently Asked Questions
What is the difference between Grade 8.8 and Grade 10.9 nuts?
Grade 8.8 nuts have tensile strength ≥800MPa, suitable for general industrial applications; Grade 10.9 has higher strength (≥1000MPa), ideal for high-load or vibration environments.
How effective is Black Oxide coating for rust protection?
Black Oxide provides basic rust protection, suitable for dry or mildly humid environments. For higher corrosion resistance, we recommend zinc plating or Dacromet coating.
What is the minimum order quantity (MOQ)?
Standard sizes have MOQ of 1,000 pieces, with sample testing support. Special sizes are negotiable.
Do you provide other certifications (ISO, DIN)?
Yes, we can provide products complying with ISO 898-2, DIN 934, and other international standards.
Our Manufacturing Facility and Products
Direct Supply from Chinese Factory
Welcome to Handan Quanfan Metal Products Co., Ltd., a leading China manufacturer specializing in fasteners including self drilling screws, drywall screws, stainless steel bolts, self tapping screws, and grade 5 nuts.
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Need more information about our Grade 8.8 Nuts or have special requirements? Our technical sales team is ready to serve you across Southeast Asia.
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