Stud Bolts - Pumps, Valves, Piping and Fittings
Marine stud bolts are threaded fasteners used with nuts for assembling pump casings, valves, pipe flanges, strainers and other pressure-containing equipment. They are selected by diameter, length, thread form, material grade, coating and pressure-temperature requirements.
ProShipWorks provides end-to-end support to source and supply Stud Bolts for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Stud Bolts |
|---|---|
| Product Category | Pumps, Valves, Piping and Fittings |
| Product Reference | 647 |
| Brands / Manufacturers | Würth, Bossard, Unbrako |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Full- or partial-threaded configurations |
| 2. Common ASTM A193 alloy and stainless steel grades |
| 3. Compatible with ASTM A194 heavy hex nuts |
| 4. Available in metric and Unified thread forms |
| 5. Suitable for bolted flanges and pressure equipment |
Applications of Stud Bolts
| Application |
|---|
| 1. Marine pumps and pump casings |
| 2. Valves, pipe flanges and fittings |
| 3. Seawater, ballast, cooling and fuel-oil piping systems |
Models & Manufacturers
| Model | Manufacturer |
|---|---|
| ASTM A193 Grade B7 Stud Bolt | Various certified manufacturers |
| ASTM A193 Grade B8 Class 2 Stud Bolt | Various certified manufacturers |
| ASTM A193 Grade B16 Stud Bolt | Various certified manufacturers |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| ASTM A193 Grade B7 | Material | Chromium-molybdenum alloy steel | — |
| ASTM A193 Grade B7 | Tensile strength | Minimum 860 | MPa |
| ASTM A193 Grade B8 Class 2 | Material | 304 stainless steel, strain hardened | — |
| ASTM A193 Grade B16 | Material | Chromium-molybdenum-vanadium alloy steel | — |
| General | Nut compatibility | ASTM A194 heavy hex nuts | — |
| General | Thread standard | ASME B1.1 Unified or ISO metric thread | — |
Standards, Certifications & Class Approval
Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.
| Applicable Standards & Certification | Common requirements include ASTM A193/A193M for alloy and stainless steel bolting, ASTM A194/A194M for nuts, ASME B1.1 for Unified threads, ISO 965 for metric threads, and ASME B16.5 or B16.47 for applicable flanged joint dimensions. Material certificates are commonly supplied to EN 10204 3.1. |
|---|---|
| Class Approval | Individual stud bolts are not normally class-approved as standalone items. Classification societies such as DNV, ABS, Lloyd's Register, Bureau Veritas and ClassNK may require traceable material certificates, approved grades and installation procedures for safety-critical marine systems. |
Installation, Maintenance & Safety Information
| Installation Notes | Confirm diameter, length, thread form, material grade, nut grade, flange standard and gasket arrangement before installation. Clean threads, lubricate with an approved compound, install in the specified cross-tightening sequence and apply the required torque or tension. |
|---|---|
| Maintenance Tips | Inspect accessible bolting for corrosion, thread damage, loosening and leakage at the joint. Replace studs and nuts showing significant wastage, galling or deformation. Do not mix incompatible grades or coatings without engineering approval. |
| Safety Notes | Depressurize, drain and isolate the system before loosening bolted joints. Use calibrated torque equipment and suitable personal protective equipment. Follow approved tightening procedures, especially for high-pressure, hot, toxic, flammable or seawater systems. |
Request a Quote for Stud Bolts
Contact ProShipWorks for marine or industrial product sourcing, quotations and delivery.
- Vessel name and IMO number
- ETA / vessel schedule
- Berth or vessel location
- Required quantity
- Preferred delivery window
- Shipping agent contact details
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