ASME B 18.31.3 Inch Threaded Rod
ASME B18.31.3 threaded rods are fully threaded fasteners manufactured in accordance with the ASME B18.31.3 standard for inch-series threaded rods. Available in carbon steel, alloy steel, and stainless steel, these threaded rods can be supplied with Unified thread profiles such as UNC, UNF, and 8UN, as well as ACME threads for applications requiring different engagement or adjustment characteristics. Various lengths, diameters, materials, and surface finishes can be supplied to meet specific assembly and engineering requirements.
As a threaded rod manufacturer, we provide ASME B18.31.3 threaded rods with controlled dimensions and thread quality for applications where continuous external threading is required. Material and mechanical properties can be supplied according to applicable ASTM specifications and customer requirements, while finishes such as plain, zinc plated, hot-dip galvanized, and black oxide are available for different service environments.
Specification:
| Item | Specification |
|---|---|
| Standard | ASME B 18.31.3 |
| Product Type | Inch Threaded Rod |
| Thread Diameter | 4#-5" |
| Mechanical Property Standard | ASTM A307,ASTM F1554.ASTM A193,ASTM F593 |
| Material | Carbon Steel,Alloy Steel,Stainless Steel |
| Thread | UNC,UNF,8UN,ACME |
| Thread Class | 1A,2A,3A |
| Thread Standard | ASME B1.1 |
| Surface Treatment | Black Oxidation,Zinc Plated,Hot Dip Galvanized,Bright Finish,Passivation |
| Inspection | Dimensions, Thread,Mechanical Property,Coating |
Dimension Chart of ASME B 18.31.3 Inch Threaded Rod:
| Thread | 4# | 5# | 6# | 8# | 10# | 12# | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 | 7/8 | 1 | 1-1/8 |
| Diameter(d) | 0.1120 | 0.1250 | 0.1380 | 0.1640 | 0.1900 | 0.2160 | 0.2500 | 0.3125 | 0.3750 | 0.4370 | 0.5000 | 0.5620 | 0.6250 | 0.7500 | 0.8750 | 1.0000 | 1.1250 |
| UNC | 40 | 40 | 32 | 32 | 24 | 24 | 20 | 18 | 16 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 |
| 8UN | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 8 |
| UNF | 48 | 44 | 40 | 36 | 32 | 28 | 28 | 24 | 24 | 20 | 20 | 18 | 18 | 16 | 14 | 14 | 12 |
| Acme | - | - | - | - | - | - | 16 | 14 | 12 | 12 | 10 | - | 8 | 6 | 6 | 5 | 5 |
| Thread | 1-1/4 | 1-3/8 | 1-1/2 | 1-5/8 | 1-3/4 | 1-7/8 | 2 | 2-1/4 | 2-1/2 | 2-3/4 | 3 | 3-1/4 | 3-1/2 | 3-3/4 | 4 | 4-1/2 | 5 |
| Diameter(d) | 1.2500 | 1.3750 | 1.5000 | 1.6250 | 1.7500 | 1.8750 | 2.0000 | 2.2500 | 2.5000 | 2.7500 | 3.0000 | 3.2500 | 3.5000 | 3.7500 | 4.0000 | 4.5000 | 5.0000 |
| UNC | 7 | 6 | 6 | - | 5 | - | 4.5 | 4.5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | - | - |
| 8UN | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | - | - |
| UNF | 12 | 12 | 12 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Acme | 5 | 4 | 4 | - | 4 | - | 4 | 3 | 3 | 3 | 2 | - | 2 | - | 2 | 2 | 2 |
Application of ASME B 18.31.3 Inch Threaded Rod:
ASME B18.31.3 threaded rods are used in applications where a continuous threaded fastener is required for securing, assembling, or supporting components. Their fully threaded design allows nuts, washers, couplings, and other threaded components to be positioned at different points along the rod, making them suitable for a wide range of industrial and construction applications.
Construction and Structural Assembly
Threaded rods are commonly used for fastening and supporting structural components, equipment, frames, and building systems. They can be used with nuts and washers to create adjustable connections and are available in different diameters, lengths, materials, and finishes to suit specific installation requirements.
Mechanical and Industrial Equipment
In industrial equipment and machinery, ASME B18.31.3 threaded rods can be used for component assembly, equipment mounting, bracing, and positioning. Different material grades and surface finishes can be selected according to the required strength, corrosion resistance, and operating environment.
Piping, HVAC, and Electrical Installation
Threaded rods are also widely used for suspending and supporting pipes, ducts, cable trays, conduits, and HVAC equipment. Their continuous external threads allow supports and accessories to be adjusted along the rod, providing flexibility during installation and maintenance.