ISO 8677 Large Cup Head Square Neck Bolts
Product: ISO 8677 Large Cup Head Square Neck Bolts -Product Grade C
Property Class:4.6,4.8,5.6,5.8,8.8,10.9,12.9,
A2-70, A4-70,A4-80
Finish:Zinc Plating（Yellow Zinc, Zinc Blue, Rinse Color), Black, Phosphate & Oil, Zinc Phosphate, Hot-dip Galvanized(HDG),Dacromet, Geomet
Material:Steel
Export country: USA, Japan, Australia, Europe and so on
Support customer customization
When your project demands maximum holding power, anti-rotation security, and long-term durability, look no further than ISO 8677 Large Cup Head Square Neck Bolts. Engineered to meet stringent ISO 8677 standards, these bolts deliver exceptional mechanical strength and reliable torque performance in heavy structural, construction, and industrial applications.
Whether you're fabricating steel frames, assembling bridges, or installing public infrastructure, ISO 8677 Large Cup Head Square Neck Bolts provide the unmatched reliability your team can count on.
What Are ISO 8677 Large Cup Head Square Neck Bolts?
ISO 8677 Large Cup Head Square Neck Bolts feature a broad domed (cup) head with a robust square neck, designed to lock into place and resist turning during installation. Compliant with the ISO 8677 international standard, these bolts are manufactured for heavy-duty use, especially in high-vibration or load-bearing assemblies.
They are ideal for situations where high clamping force, one-sided installation, and anti-tamper design are essential.
Key Features of ISO 8677 Large Cup Head Square Neck Bolts
✅ ISO 8677 Compliant – Precision-manufactured to meet international standards
✅ Large Cup Head Design – Distributes load over a wide surface for maximum clamping
✅ Square Neck Locking – Prevents bolt rotation during tightening
✅ High Tensile Strength – Withstands extreme mechanical and environmental stress
✅ Available in Multiple Grades – Carbon steel, stainless steel, hot-dip galvanized
✅ Sizes Ranging from M10 to M24+ – For medium to ultra-heavy structural demands
Applications of ISO 8677 Large Cup Head Square Neck Bolts
Used in critical engineering projects worldwide, ISO 8677 Large Cup Head Square Neck Bolts are trusted in:
?️ Steel structure assembly (bridges, towers, warehouses)
? Infrastructure development (rail systems, guardrails, fencing)
? Heavy equipment fabrication
?️ Industrial machinery and mining systems
? Wood-to-metal and metal-to-metal high-load connections
Where secure fastening and structural integrity are non-negotiable, these bolts stand out as the industry’s top choice.
Why Choose ISO 8677 Large Cup Head Square Neck Bolts?
| Feature | Benefit |
|---|---|
| ISO 8677 Standardized | Ensures global compatibility and quality assurance |
| Large Domed Head | Better load spread, improved surface integrity |
| Square Neck Design | No spinning during tightening – perfect for high-vibration zones |
| Durable Surface Finishes | Resistant to corrosion, wear, and harsh environments |
| Heavy Load Capacity | Ideal for large-scale, structural-grade assemblies |
Trusted by Engineers Worldwide
“The ISO 8677 Large Cup Head Square Neck Bolts performed flawlessly in our rail station expansion. Lock-tight, corrosion-resistant, and strong under constant vibration.”
— ⭐⭐⭐⭐⭐ Senior Project Engineer
“Easy installation, excellent quality. These bolts handle serious loads and don’t loosen over time.”
— ⭐⭐⭐⭐⭐ Infrastructure Procurement Officer
Available Customization & Bulk Supply
We provide ISO 8677 Large Cup Head Square Neck Bolts in bulk quantities with:
? Custom lengths, coatings, and thread types
? OEM packaging and labeling
? Global shipping with fast lead times
? Full technical support and documentation
Get ISO 8677 Large Cup Head Square Neck Bolts Today
Looking for a reliable, industrial-grade fastening solution backed by international standards? Choose ISO 8677 Large Cup Head Square Neck Bolts to ensure your project is built on a foundation of strength, safety, and compliance.
? Request a quote or place your order today — your heavy-duty fastening solution is just a click away.
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