Hangzhou Gmetal ‘s 8.8 grade high-strength structural bolts are specially customized for the infrastructure and industrial needs of the North African and South American markets!
Gmetal uses high-quality medium-carbon steel for forging, and the products are refined through heat treatment (quenching + high-temperature tempering), resulting in a tensile strength of ≥800MPa and a yield strength of ≥640MPa. The products strictly adhere to international standards GB/T 1231, ISO 898-1, and DIN 931/933.
Our Hex bolt Grade 8.8 undergo triple testing for tensile strength, shear strength, and hardness. They are less prone to breakage or loosening in high-load applications such as tower crane lifting, mining crusher assembly, and cross-sea bridge construction, thus preventing potential safety hazards from the source.
Considering the high temperatures and dust in North Africa and the high humidity and salt spray in South America, Gmetal company will provide customized surface treatment solutions according to customer requirements,such as increase the thickness of hot dipped galvanized . If you have this inquiry ,please send us email by
sales@gmetalparts.com
WHY CHOOSE OUR HIGH TENSILE HEX BOLTS HDG GRADE 8.8?
——Exclusive purchasing reasons for the North African and South American markets.
Extremely tensile strength, suitable for demanding engineering applications requiring high load capacity.
Manufactured in strict accordance with ISO 898-1 and GB/T 1231 standards, and subjected to triple testing for tensile strength, shear strength, and hardness.
Whether facing the strong wind loads on photovoltaic supports in the North African desert or the high-frequency vibrations of mining equipment in South America, Hangzhou Gmetal bolts provide secure fastening, eliminating the risk of loosening or breakage, and building a strong safety foundation for heavy-duty infrastructure and mechanical assembly.
Hot Dipped Galvanized(Hdg) Coating
Our hot-dip galvanized bolts offer high corrosion resistance ,making them suitable for coastal engineering projects in South America and outdoor infrastructure in North Africa,with a service life of over 10years .The zinc coating thickness is ≥85μm, providing strong adhesion and resistance to peeling. It can withstand salt spray testing for over 1000 hours.
Precision-threaded machining and strict dimension control ensure the bolts fit perfectly with nuts and washers, delivering long-lasting and stable fastening performance. They stand up to sand and dust erosion in North African deserts and damp corrosion in South American rainforests, making them the go-to fastening solution for local steel structure factories, mining equipment, bridge projects, and wind-solar energy installations.
Strict Quality Control
Precision-threaded machining and strict dimension control ensure the bolts fit perfectly with nuts and washers, delivering long-lasting and stable fastening performance. They stand up to sand and dust erosion in North African deserts and damp corrosion in South American rainforests, making them the go-to fastening solution for local steel structure factories, mining equipment, bridge projects, and wind-solar energy installations.
Perfect Bolts and Nuts assembling
Every set of high-strength hexagonal bolts and nuts produced by Hangzhou Gulian Metal is perfectly assembled, with tight connections and no looseness or vibration. This makes the entire bolt and nut assembly ideal for applications requiring a perfect match between high-strength hexagonal bolts and nuts, providing reliable performance even in demanding environments.”
Customized and adapted to meet local procurement standards.
Hangzhou Gmetal bolts support both metric and imperial specifications. Dimensions are precisely matched to mainstream engineering equipment in North Africa and South America. SGS test reports and COC certificates of conformity are available, meeting the strict requirements of local customs clearance and project acceptance, thus avoiding procurement delays due to incomplete certifications.
Excellent value for money and guaranteed delivery times
Directly supplied from the factory, bulk purchases enjoy tiered discounts;
Considering the characteristics of South American sea freight and North African land transport, we utilize vacuum moisture-proof packaging + reinforced wooden crates to minimize transportation losses;
We support small-batch trial orders, and large orders can be expedited. “
Trusted by industry leaders in North Africa and South America
With an excellent reputation and a commitment to quality, Hangzhou Gmetal has become a trusted partner for businesses throughout South America. Our high-strength galvanized hexagonal bolts (Grade 8.8) are trusted by leading construction companies, industrial manufacturers, and infrastructure developers who demand the highest quality products.
Why Partner With Hangzhou Gmetalparts?
Local Market Insight. With over 17 years of experience in the fasteners industry, we deeply understand the true needs and challenges in North African and South American markets—from extreme climate resilience to local project certification requirements.
Fast Delivery. Prompt response to every order request. Regular delivery takes only 35–40 days, perfectly meeting your urgent project timelines in regions with accelerated infrastructure development.
Technical Support. Boasting more than 17 years of fasteners manufacturing and customizing expertise, our dedicated team is ready to assist with standard specifications and tailor-made solutions—whether you need bolts adapted to desert dustproof needs or rainforest corrosion resistance.
Competitive Pricing. We fully recognize the fierce competition in North African and South American markets. We are committed to providing you with premium-quality fasteners at cost-effective prices. Growing hand in hand with our customers is always our core pursuit.
Building a sturdier future, bolt by bolt.
For North African and South American markets, regions renowned for their ambitious infrastructure projects and rapid industrial development, you need fasteners that can keep pace with your growth. Our Hex Bolts HDG Grade 8.8 are engineered to support the development vision of these regions, delivering unmatched reliability and performance for your most critical applications—from desert solar farms and coastal bridges to rainforest mining equipment.
Ready to elevate your projects with the strength and durability of our Hex Bolts HDG Grade 8.8? Contact us today at sales@gmetalparts.com to learn more about our products or request a quote with your specific requirements. At Gmetalparts, we are here to help you build with confidence.
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