ASME B 18.2.6 Heavy Hex Bolts
ASME B18.2.6 heavy hex structural bolts are inch-series structural fasteners manufactured to the dimensional requirements specified for structural applications. The standard defines key dimensions for heavy hex structural bolts, including head dimensions, body diameter, bolt length and thread length, providing a standardized configuration for high-strength structural connections.
These structural bolts are commonly supplied to ASTM F3125/F3125M requirements, including Grade A325 and Grade A490, with compatible heavy hex structural nuts and hardened steel washers. Depending on the specified grade and project requirements, assemblies can be supplied in plain or zinc-coated finishes. We provide ASME B18.2.6 heavy hex structural bolts in different diameters, lengths and configurations for steel construction and other structural fastening applications.
Specification:
ASME B18.2.6 defines the dimensional requirements for fasteners used in structural applications. The applicable requirements cover bolt geometry, Unified inch threads, dimensional tolerances and component compatibility. Material and mechanical properties are specified by the applicable product standards, while nuts, washers and protective coatings are selected according to the corresponding structural fastener specifications.
| Item | Specification |
|---|---|
| Dimensional Standard | ASME B18.2.6 |
| Product Type | Heavy Hex Structural Bolt |
| Size System | Inch Series |
| Size Range | 1/2"-1-1/2" |
| Material | Carbon Steel, Alloy Steel |
| Property Class | ASTM F3125/F3125M |
| Thread Series | UNC |
| Thread Class | 2A |
| Thread Standard | ASME B1.1 |
| Compatiable Nut | Heavy Hex Nut A563 |
| Compatiable Washer | Hardened Steel Washer F436/F436M |
| Surface Treatment | Black Oxidation,Zinc Plated,Hot Dip Galvanized |
| Hdg Standard | ASTM F2329 |
| Assembly | Bolt+Nut+Washer |
| Quality Assurance | ASMEB18.18 |
| Inspection | Dimensions, Thread,Mechanical Property,Coating |
Dimension Chart of ASME B 18.2.6 Heavy Hex Bolts:
The ASME B18.2.6 dimension chart provides the key dimensional requirements for heavy hex structural bolts in inch sizes. It covers important dimensions such as nominal diameter, width across flats, head height, body diameter, bolt length and thread length. Structural bolt dimensions, particularly thread length and head geometry, are specified for structural fastening applications and should be matched with the appropriate nuts and washers.
| Mon | 1/2 | 5/8 | 3/4 | 7/8 | 1 | 1-1/8 | 1-1/4 | 1-3/8 | 1-1/2 |
| P | 13 | 11 | 10 | 9 | 8 | 7 | 7 | 6 | 6 |
| ds max | 0.515 | 0.642 | 0.768 | 0.895 | 1.022 | 1.149 | 1.277 | 1.404 | 1.531 |
| ds min | 0.482 | 0.605 | 0.729 | 0.852 | 0.976 | 1.098 | 1.223 | 1.345 | 1.47 |
| k max | 0.323 | 0.403 | 0.483 | 0.563 | 0.627 | 0.718 | 0.813 | 0.878 | 0.974 |
| k min | 0.302 | 0.378 | 0.455 | 0.531 | 0.591 | 0.658 | 0.749 | 0.81 | 0.902 |
| s max | 0.875 | 1.062 | 1.25 | 1.438 | 1.625 | 1.812 | 2 | 2.188 | 2.375 |
| s min | 0.85 | 1.031 | 1.212 | 1.394 | 1.575 | 1.756 | 1.938 | 2.119 | 2.3 |
| r max | 0.031 | 0.062 | 0.062 | 0.062 | 0.093 | 0.093 | 0.093 | 0.093 | 0.093 |
| r min | 0.009 | 0.021 | 0.021 | 0.031 | 0.062 | 0.062 | 0.062 | 0.062 | 0.062 |
ASME B 18.2.6 Heavy Hex Bolts:
Structural Steel Connections
ASME B18.2.6 heavy hex structural bolts are used for bolted connections between structural steel members, including beams, columns, plates, bracing members and other fabricated steel components. They are suitable for structural assemblies where high-strength structural fasteners are specified.
Steel Buildings & Industrial Structures
These structural bolts are suitable for steel building frames, industrial facilities, platforms, towers and other fabricated steel structures. They can be supplied with compatible structural nuts and hardened steel washers to meet project-specific fastening requirements.
Bridges & Infrastructure
Heavy hex structural bolts are also used in bridges and other infrastructure projects involving structural steel connections. ASTM F3125/F3125M grades such as A325 and A490 can be selected according to the required mechanical properties and applicable project specifications.