Diameter
Large and special diameters by review
Product capability
A clear stocked range without limiting custom manufacturing review
The stock range gives buyers a practical starting point for common heavy-duty sizes. It is not presented as the maximum diameter that can be manufactured.
- Large and special diameters reviewed against the standard or drawing.
- Other diameters and special head or thread dimensions can be reviewed.
- Full or partial thread, matched nuts and washers, and project packing.
- Black, zinc, hot-dip galvanized and other finishes are evaluated by specification.
Length
Standard and extra-long requirements
Grades
Grade / material by specification
Standards
DIN / ISO / ASTM / GB / drawings
Available configurations
Product variants and supply options
Heavy-Duty Large Diameter Bolts
Large-diameter bolts for structural steelwork, machinery bases and high-load project connections. Diameter, overall length, thread length, strength grade, finish and matched components are reviewed against the applicable standard or drawing.
Galvanized Structural Assemblies
Hot-dip galvanized bolt, nut and washer assemblies for outdoor structural installation. Thread allowance, coating thickness and component fit are checked to support reliable field assembly after galvanizing.
Heavy Hex Bolt Options
Heavy hex and structural bolt configurations for high-load joints in steelwork, equipment and industrial projects. Head dimensions, grade, thread form and finish can be supplied according to DIN, ISO, ASTM, GB or approved drawings.
Typical applications
Where this product is commonly specified
Steel Structures
Primary and secondary structural connections.
Bridge & Civil Projects
Large bolted assemblies and project fasteners.
Heavy Machinery
Machine frames, bases and high-load equipment.
Power & Energy
Foundation, tower and equipment connections.
Mining Equipment
Large fasteners for harsh-duty assemblies.
Industrial Distribution
Stock and project-based heavy bolt supply.
Direct factory review
Send a large-diameter bolt RFQ
Provide the main specification. Drawings or detailed lists can also be sent to sales@fasnafasteners.com.
Fast response channelWhatsApp: +86 188 3303 0376
Helpful detailsStandard, size, grade, surface, quantity, destination and packing.