Heavy Hex Bolts
Industrial Engineering Works manufactures and supplies high-strength heavy hex bolts for demanding structural, industrial, oil & gas, petrochemical, power generation and heavy engineering applications. Our heavy hex bolts are available in alloy steel, stainless steel, carbon steel, duplex, super duplex and nickel alloys, with standard and custom dimensions.
Heavy hex bolts feature a larger and thicker head than standard hex bolts, providing a greater bearing surface and making them suitable for applications requiring robust bolted connections. Products can be supplied according to applicable ASTM, ASME, ANSI, DIN and ISO requirements, with specified threads, finishes, coatings and inspection documentation.
Types of Heavy Hex Bolts
Fully Threaded Heavy Hex Bolts
Fully threaded heavy hex bolts have threads extending along the specified shank length and are suitable for applications requiring maximum thread engagement and flexible installation.
Partially Threaded Heavy Hex Bolts
Partially threaded heavy hex bolts feature an unthreaded shank section with a threaded end, providing suitable load-bearing characteristics for structural and industrial connections.
Structural Heavy Hex Bolts
Structural heavy hex bolts are designed for demanding structural connections where high-strength bolting and reliable load transfer are required.
High Tensile Heavy Hex Bolts
High tensile heavy hex bolts are manufactured from high-strength materials for applications requiring enhanced mechanical performance under demanding loads.
Custom Heavy Hex Bolts
Custom heavy hex bolts can be manufactured according to customer drawings and specifications, including special diameters, lengths, threads, materials, head dimensions and finishes.
Heavy Hex Bolts by Material
Heavy Hex Bolts by ASTM Standards
ASTM A193 Heavy Hex Bolts
ASTM A193 grades such as B7 and B16 are commonly selected for high-temperature and high-pressure industrial applications, including flanges, valves and pressure equipment.
ASTM A320 Heavy Hex Bolts
ASTM A320 grades such as L7 are suitable for applications requiring specified mechanical performance at lower temperatures.
ASTM F3125 Grade A325
ASTM F3125 Grade A325 structural bolts are high-strength structural fasteners used for structural steel connections and heavy engineering applications.
ASTM F3125 Grade A490
ASTM F3125 Grade A490 provides high-strength structural bolting for demanding structural connections where the applicable specification is required.
ASTM A307 Heavy Hex Bolts
ASTM A307 bolts are used for general-purpose industrial and mechanical applications where the applicable material and strength requirements are specified.
Available Grades
Applications of Heavy Hex Bolts
Structural Steel Construction
Heavy hex bolts are widely used in structural steel connections where high-strength fastening and reliable load transfer are required.
Oil & Gas Industry
Heavy hex bolts are used in piping, flanges, valves, equipment and other bolted connections throughout oil & gas facilities.
Petrochemical Plants
Heavy hex bolts support secure connections in process equipment, piping, flanges, vessels and petrochemical systems.
Power Generation
Heavy hex bolts are used in power generation equipment, structural connections, piping systems and pressure-related applications.
Pressure Vessels
High-strength heavy hex bolts can be used for pressure vessel flanges, covers and other specified bolted connections.
Bridges & Infrastructure
Structural heavy hex bolts are suitable for bridge construction, infrastructure projects and heavy structural assemblies.
Offshore Platforms
Heavy hex bolts can be supplied in suitable corrosion-resistant materials and coatings for offshore structures and marine environments.
Heavy Equipment
Heavy hex bolts are used in machinery, industrial equipment and heavy engineering applications requiring robust mechanical connections.
Heavy Hex Bolt Specifications
| Specification | Details |
|---|---|
| Diameter | 1/4" to 4" |
| Length | Custom |
| Thread Type | UNC, UNF, Metric |
| Standards | ASTM, ASME, ANSI, DIN, ISO |
| Material | Alloy Steel, Stainless Steel, Carbon Steel, Duplex |
| Finish | Plain, PTFE, Xylan, Hot Dip Galvanized, Zinc Plated |
Why Choose Industrial Engineering Works?
Heavy Hex Bolt Dimensions & Standards
ASME B18.2.1
ASME B18.2.1 provides dimensional requirements for inch-series square and hex bolts, screws and other applicable fastener products. Heavy hex dimensions can be supplied according to the applicable product and dimensional requirements.
ASTM Dimensional Standards
Applicable ASTM specifications can define material, mechanical, dimensional and testing requirements depending on the heavy hex bolt grade and application.
UNC Threads
UNC threads provide a coarse unified thread configuration and are commonly used for structural and general industrial fastening.
UNF Threads
UNF threads provide a finer unified thread configuration and can be supplied where required by the application or engineering specification.
Metric Threads
Metric heavy hex bolts can be manufactured according to specified metric diameter, pitch and dimensional requirements.
Head Dimensions
Heavy hex bolt heads are larger and thicker than standard hex bolt heads, providing increased bearing area and suitable wrenching surfaces.
Standard Lengths
Heavy hex bolts are available in standard and custom lengths based on connection design, material thickness, thread engagement and customer requirements.
Surface Finishes & Coatings
Heavy Hex Bolts vs Standard Hex Bolts
| Feature | Heavy Hex Bolt | Standard Hex Bolt |
|---|---|---|
| Head Size | Larger & thicker | Standard |
| Bearing Surface | Higher | Standard |
| Load Capacity | Higher for applicable high-strength designs | Moderate |
| Typical Applications | Structural, pressure vessels, flanges | General engineering |
Frequently Asked Questions
What are Heavy Hex Bolts?
Heavy hex bolts are fasteners with a larger and thicker hexagonal head than standard hex bolts. They are commonly used in structural, industrial, pressure equipment, flange and heavy engineering applications.
How are Heavy Hex Bolts different from standard Hex Bolts?
The primary difference is the head geometry. Heavy hex bolts have a larger and thicker head, providing a greater bearing surface and wrenching area than standard hex bolts.
Which ASTM standards are available?
Depending on the application and material requirements, Industrial Engineering Works can supply heavy hex bolts according to standards and grades including ASTM A193 B7, ASTM A193 B16, ASTM A320 L7, ASTM F3125 Grade A325, ASTM F3125 Grade A490 and ASTM A307.
Which industries use Heavy Hex Bolts?
Heavy hex bolts are used in structural steel construction, oil & gas, petrochemical plants, power generation, pressure vessels, bridges, infrastructure, offshore platforms and heavy equipment.
Do you manufacture custom Heavy Hex Bolts?
Yes. Custom heavy hex bolts can be manufactured according to required diameter, length, thread configuration, material, head dimensions, coating and customer drawings or specifications.
Do you supply Heavy Hex Bolts across the USA?
Yes. Industrial Engineering Works supplies heavy hex bolts to customers and industrial projects throughout the USA, along with worldwide export capabilities.
Can you provide Mill Test Certificates?
Yes. Mill Test Certificates and applicable inspection documentation can be supplied according to the material grade, project specification and customer requirements.