Heavy Hex Bolts
Heavy hex bolts are heavy-duty fasteners featuring a large hexagonal head and robust construction, providing a greater bearing surface and allowing secure tightening with standard tools. Their strong and durable design makes them suitable for demanding fastening applications where reliable clamping force and mechanical strength are required.
We supply heavy hex bolts in carbon steel, alloy steel and stainless steel, with different grades, dimensions, thread configurations and surface finishes available to meet specific application requirements. Our heavy hex bolts can be manufactured to widely used international dimensional and performance standards, including metric and inch-series specifications, for industrial, structural, machinery and general engineering applications.
Dimension Standard:
Heavy hex bolts are available in different dimensional configurations to meet the requirements of various international standards and markets. We manufacture heavy hex bolts to a wide range of DIN, EN, GOST, ASME, JIS and AS specifications, covering both metric and inch-series dimensions. Depending on the selected standard, dimensions such as head size, head height, bolt diameter, thread length and overall bolt length may vary. Whether you require standard sizes or non-standard dimensions, our manufacturing capabilities allow us to produce heavy hex bolts to the applicable standard, technical drawing or customer specification.
DIN6914 Heavy Hex Bolt
DIN 6914 heavy hex bolts are high-strength structural bolts designed for steel construction and other demanding fastening applications. These heavy hex bolts are typically used with matching structural nuts and washers to form reliable bolted connections.
AS1252 Structural Bolt
AS 1252 heavy hex bolts are high-strength structural fasteners commonly specified for steel construction in Australia. These heavy hex bolts are available as part of structural bolting assemblies and are used where consistent dimensions and reliable joint performance are required.
ASME B18.2.1 Heavy Hex Bolt
ASME B18.2.1 heavy hex bolts are inch-series fasteners defined by a widely used dimensional standard for heavy hex head configurations. These heavy hex bolts can be supplied in carbon steel, alloy steel and stainless steel with different grades and finishes.
ASME B18.2.6 Structural Bolt
ASME B18.2.6 heavy hex structural bolts are designed specifically for structural fastening applications in inch-series dimensions. These heavy hex bolts are commonly supplied with compatible structural nuts and hardened washers and can be specified with ASTM F3125 grades such as A325 and A490.
GOST 52644 Structural Bolt
GOST 52644 heavy hex bolts are high-strength structural fasteners developed for metric applications and commonly used in steel structures and heavy-duty construction. These heavy hex bolts are supplied with dimensions and mechanical properties suitable for the applicable structural fastening requirements.
JIS B 1186 Structural Bolt
JIS B 1186 heavy hex bolts are high-strength structural bolting assemblies used for steel construction and preloaded connections in accordance with Japanese specifications. These heavy hex bolts are commonly available in F8T and F10T strength classes together with matching nuts and washers.
EN14399-3 HR System Bolt
EN 14399-3 heavy hex bolts form part of the HR system for high-strength preloaded structural connections. These heavy hex bolts are supplied as matched assemblies with compatible nuts and washers and are designed for applications where controlled preload and structural joint performance are required.
EN14399-4 HV System Bolt
EN 14399-4 heavy hex bolts form part of the HV system for high-strength preloaded steel connections. These heavy hex bolts feature a specific bolt and nut configuration with a short threaded section, making the complete assembly suitable for demanding structural applications.
Mechanical Property
Heavy hex bolts are available in a wide range of strength grades and material specifications to meet different load, temperature and service requirements. We supply carbon steel, alloy steel and stainless steel heavy hex bolts with mechanical properties specified according to applicable international standards. Depending on the application, customers can select standard property classes for general and high-strength fastening, structural bolt grades for steel connections, or corrosion-resistant stainless steel grades for demanding environments.
Common specifications include ISO 898-1 property classes 8.8 and 10.9, SAE J429 Grade 5 and Grade 8, ASTM F3125 grades A325 and A490, ASTM A193 alloy steel grades, ASTM A394, as well as ASTM F593 and ISO 3506-1 for stainless steel heavy hex bolts. Tensile strength, yield strength, hardness and heat treatment requirements vary according to the selected grade and material specification.
| Standard | Common Grade/Class | Material |
|---|---|---|
| ASTM F3125/F3125M | A325 | Carbon Steel& Alloy Steel |
| ASTM F3125/F3125M | A490 | Alloy Steel |
| SAE J 429 | Grade5&Grade8 | Carbon Steel& Alloy Steel |
| ISO898-1 | 8.8/10.9 | Carbon Steel& Alloy Steel |
| ASTM A394 | Type0, Type1 | Carbon Steel& Alloy Steel |
| ASTM A193/A193M | B7,B7M,B8,B8M,B16 | Alloy Steel&Stainless Steel |
| ASTM F593 | Group1 Group2 | Stainless Steel |
| ISO 3506-1 | A2-70 | 304 & 304L Stainless Steel |
| A2-80 | 304 & 304L Stainless Steel | |
| A4-70 | 316 & 316L Stainless Steel | |
| A4-80 | 316 & 316L Stainless Steel |
Application of Heavy Hex Bolts:
Structural Steel Construction
Heavy hex bolts are widely used in steel buildings, bridges, platforms, towers and fabricated structures where secure, high-strength connections are required. Carbon and alloy steel grades are commonly selected for load-bearing structural connections, with the appropriate bolt, nut and washer combination specified according to project requirements.
Machinery & Industrial Equipment
Heavy hex bolts are commonly used in heavy machinery, industrial equipment, manufacturing systems and mechanical assemblies where reliable fastening and resistance to high loads are required. Different materials, strength grades and surface finishes can be selected according to operating conditions and equipment requirements.
Marine, Chemical & Outdoor Applications
Stainless steel heavy hex bolts are particularly suitable for applications exposed to moisture, salt water, chemicals or outdoor weather conditions. They are commonly used in marine equipment, water treatment systems, chemical processing facilities, food processing machinery and other environments where corrosion resistance is important.
Energy & Heavy-Duty Industries
Heavy hex bolts are also used in power generation, oil and gas, mining and other demanding industrial applications. High-strength carbon and alloy steel grades can provide the required load-carrying capacity, while stainless steel options are available when greater corrosion resistance is needed.
Related Bolt Products
Our heavy hex bolts are designed for applications where robust fastening and high load-carrying capability are required. For other fastening requirements, we also offer hex bolts, carriage bolts, flange bolts, stud bolts, U-bolts, anchor bolts, and T-bolts in a variety of materials, sizes, strength grades, and surface finishes. Visit our bolts page to explore our complete range of bolt products.