Heavy Hex Bolts – High Torque Fastening for Structural Strength
Product Description
Heavy Hex Bolts are high-strength fasteners with a larger head and a broader wrenching surface than standard hex bolts. These are designed for high-load-bearing structural applications, especially where torque resistance and vibration control are critical.
Manufactured from high tensile or alloy steels, SM Fasteners’ Heavy Hex Bolts meet global standards like ASTM A325, A490 and are available in various coatings including black oxide, hot-dip galvanized, and zinc-plated finishes.
Applications
Heavy Hex Bolts are primarily used in:
Steel Structure Fabrication
Bridges and Flyovers
Heavy Equipment Assembly
Windmill Towers and Foundations
Petrochemical Plants and Refineries
Transmission Towers
Mining and Construction Equipment
Technical Specifications
| Parameter | Details |
|---|---|
| Type | Full Thread / Partial Thread |
| Standards | ASTM A325, ASTM A490, IS 1364, ASME B18.2.1 |
| Head Type | Heavy Hexagonal Head |
| Material | Alloy Steel, High Tensile Steel, Stainless Steel |
| Grades | 8.8, 10.9, 12.9, B7 |
| Finish | Black Oxide, Zinc Plated, Hot Dip Galvanized, Phosphated |
| Thread | Metric / UNC / UNF |
| Available Sizes | M12 to M64 | ½” to 2.5” |
| Accessories | Heavy Hex Nuts, Spring / Flat Washers |
Why Choose Our Heavy Hex Bolts?
At SM Fasteners, we specialize in precision-forged heavy-duty bolts that perform flawlessly under extreme loads and environmental stress.
✅ Made as per ASTM / IS / ASME standards
✅ Higher load capacity than standard hex bolts
✅ Available with certified mechanical properties
✅ Factory-tested for strength and fatigue
✅ Corrosion-resistant plating options available
✅ Custom batch production for infrastructure projects
Packaging and Delivery
We ensure professional and damage-proof packaging for all bolts:
Polybag + Box + Corrugated Carton layers
HDPE / Wooden Box for export shipments
Laser-marked or labeled packaging
MOQ flexibility with bulk packing options
Industries We Serve
Our heavy hex bolts are used across multiple demanding sectors:
Structural Steel Fabricators
EPC Contractors
Transmission & Telecommunication
Cement Plants
Power Generation & Wind Energy
Oil & Gas Refineries
Railways & Metro Projects
Mining and Material Handling
Documents Supplied
With each order, we provide:
Test Certificate as per EN 10204 3.1
Material Traceability Reports
Plating Certificate
Third Party Inspection (on request)
Packing List + Invoice
Torque & Tension Specs (optional)
Request a Quotation
Need reliable Heavy Hex Bolts for your next infrastructure project?
📧 Email: susheel@smfastners.com
📞 Phone: +91 8968469570
💬 WhatsApp: Click Here
🔧 SM Fasteners – Strength That Binds Industries