Full Thread ASME B 18.31.2 Stud Bolts
Fully threaded ASME B18.31.2 stud bolts are threaded fastening components designed for reliable and serviceable bolted connections. With threads extending along the specified threaded portion, they are widely used for flange connections, piping systems, pressure equipment, petrochemical facilities, power generation equipment and industrial machinery. Different diameters, lengths and thread configurations can be supplied to meet the requirements of different applications and assembly conditions.
We supply fully threaded stud bolts manufactured to ASME B18.31.2 in a range of stainless steel, carbon steel and alloy steel materials. Stud bolts can be produced according to applicable material and mechanical requirements, including SAE, ASTM and other recognized specifications, with standard and customized sizes available. Dimensional, thread and mechanical inspection can also be provided according to customer requirements.
Specification:
Fully threaded ASME B18.31.2 stud bolts are available in a range of diameters, lengths, thread configurations, materials and surface finishes for different industrial fastening applications. The dimensional requirements are based on ASME B18.31.2, while thread specifications, material grades and mechanical requirements can be selected according to the applicable standards and service conditions. We can supply stud bolts with Unified and other specified thread configurations, together with carbon steel, alloy steel and stainless steel options meeting standards such as SAE J429, ASTM A193, ASTM A320 and ASTM F593. Standard and customized sizes, thread requirements and surface finishes are available according to customer specifications.
| Item | Specification |
|---|---|
| Standard | ASME B 18.31.2 |
| Product Type | Full Thread Stud Bolts |
| Thread | UNC,UNF,8UN |
| Thread Standard | ASME B1.1 |
| Size Range | 1/4"-4" |
| Length | Up to 12 Feet |
| Material | Carbon Steel, Alloy Steel,Stainless Steel |
| Steel Mechanical Property | SAE J429 Grade 5,Grade8,A193 B7,A193 B16 , |
| Stainless Steel Mechanical Property | ASTM F593C,F593G,F593E,A193 B8 Stud Bolts |
| Surface Treatment | Black Oxidation,Zinc Plated,Hot Dip Galvanized,Bright Finsih, Passivation |
| Inspection | Dimensions, Thread,Mechanical Property,Coating |
Dimension Chart of Full Thread ASME B 18.31.2 Stud Bolts:
The dimension chart below provides the main dimensional information for fully threaded stud bolts manufactured to ASME B18.31.2. Available dimensions include nominal diameter, thread size and stud bolt length, with thread configurations selected according to the applicable thread standard and customer requirements. We can supply stud bolts in standard and custom lengths, diameters and thread specifications for different industrial applications.
Drawing of ASME B 18.31.2 Stud Bolt
| Mon | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 | 7/8 | 1 | 1-1/8 | 1-1/4 | 1-3/8 | 1-1/2 | 1-3/4 | 2 | 2-1/4 | 2-1/2 | 2-3/4 | 3 | 3-1/4 | 3-1/2 | 3-3/4 | 4 |
| P | 20 | 18 | 16 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 7 | 6 | 6 | 5 | 4.5 | 4.5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| c max | 0.1 | 0.111 | 0.125 | 0.143 | 0.154 | 0.167 | 0.182 | 0.2 | 0.222 | 0.25 | 0.286 | 0.286 | 0.333 | 0.333 | 0.4 | 0.444 | 0.444 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
Application of Full Thread ASME B 18.31.2 Stud Bolts:
Fully threaded ASME B18.31.2 stud bolts are widely used in industrial bolted connections where secure clamping, reliable joint performance and easy assembly and disassembly are required. Their fully threaded configuration makes them suitable for flange connections, piping systems, pressure equipment and industrial machinery. Depending on the operating environment and mechanical requirements, different materials and grades can be selected, including stainless steel SS304 and SS316 stud bolts, ASTM A193 B7 and B16 alloy steel stud bolts, ASTM A193 B8 stainless steel stud bolts, and ASTM A320 L7 stud bolts for low-temperature service.
Stainless Steel Stud Bolts for Corrosive Environments
SS304 stud bolts are commonly used for general industrial applications where good corrosion resistance and durability are required, including food processing equipment, water treatment systems, chemical equipment and general machinery. For more demanding environments, SS316 stud bolts offer improved resistance to corrosion and are widely used in marine equipment, chemical processing, pharmaceutical facilities and applications exposed to moisture, chlorides or corrosive media. ASTM A193 B8 stud bolts provide another stainless steel bolting option for applications requiring both corrosion resistance and suitable mechanical performance.
Flanges & Piping Systems
Fully threaded stud bolts are widely used to connect flanges, valves, pipes and fittings in industrial piping systems. ASTM A193 B7 stud bolts are commonly selected for high-strength bolting applications, while ASTM A193 B8 stud bolts are used where stainless steel and corrosion resistance are required. SS304 and SS316 stud bolts can also be supplied for different piping and flange applications, with material selection based on the service environment and customer requirements.
Pressure, High-Temperature & Low-Temperature Applications
Fully threaded stud bolts are used in pressure vessels, heat exchangers, pumps, compressors and other equipment exposed to demanding operating conditions. ASTM A193 B16 stud bolts are suitable for high-temperature and high-pressure bolting applications, while ASTM A320 L7 stud bolts are designed for applications requiring alloy steel bolting suitable for low-temperature service. ASTM A193 B7 is also widely used for high-strength industrial and pressure-related bolted connections. The appropriate material and grade can be selected according to temperature, load, pressure and other service requirements.