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Product Overview
A Stud Bolt is a fully threaded rod used with two heavy hex nuts to fasten flanged joints and pressure-containing equipment. Stud bolts provide uniform clamping force across the flange connection, ensuring leak-proof sealing even under high pressure and extreme temperatures. They are widely used in piping systems, refineries, offshore platforms, and heavy industrial equipment.
At Moksh Tubes & Fittings LLP, we manufacture precision-engineered Stud Bolts using premium-grade raw materials and advanced threading technology. Our stud bolts are available in a wide range of diameters, lengths, thread types, and material grades to meet international standards and customer-specific requirements.
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Specifications
| Specification | Details |
|---|---|
| Product | Stud Bolt |
| Standards | ASTM A193, ASTM A320, ASTM A453, DIN, ISO, ASME |
| Material | Stainless Steel, Carbon Steel, Alloy Steel, Duplex, Super Duplex & Nickel Alloys |
| Diameter | M6 to M100 / ¼" to 4" |
| Length | Up to 6000 mm (Custom Sizes Available) |
| Thread Type | UNC, UNF, Metric, BSW, BSP |
| Thread Style | Fully Threaded |
| Surface Finish | Plain, Black, Zinc Plated, PTFE Coated, Hot Dip Galvanized |
| Manufacturing | Hot Forged / CNC Threaded |
Chemical Composition
The chemical composition of Stud Bolts depends on the selected material grade. At Moksh Tubes & Fittings LLP, our Stud Bolts are manufactured using premium-quality raw materials that comply with ASTM, ASME, DIN, ISO, EN, and BS standards, ensuring excellent corrosion resistance, high tensile strength, and long service life.
| Element | SS 304 (%) | SS 304L (%) | SS 316 (%) | SS 316L (%) |
|---|---|---|---|---|
| Carbon (C) | 0.08 Max | 0.03 Max | 0.08 Max | 0.03 Max |
| Manganese (Mn) | 2.00 Max | 2.00 Max | 2.00 Max | 2.00 Max |
| Silicon (Si) | 0.75 Max | 0.75 Max | 0.75 Max | 0.75 Max |
| Phosphorus (P) | 0.045 Max | 0.045 Max | 0.045 Max | 0.045 Max |
| Sulfur (S) | 0.030 Max | 0.030 Max | 0.030 Max | 0.030 Max |
| Chromium (Cr) | 18.00–20.00 | 18.00–20.00 | 16.00–18.00 | 16.00–18.00 |
| Nickel (Ni) | 8.00–10.50 | 8.00–12.00 | 10.00–14.00 | 10.00–14.00 |
| Molybdenum (Mo) | — | — | 2.00–3.00 | 2.00–3.00 |
| Nitrogen (N) | 0.10 Max | 0.10 Max | 0.10 Max | 0.10 Max |
| Iron (Fe) | Balance | Balance | Balance | Balance |
Note: Chemical composition varies depending on the selected material grade. Carbon Steel, Alloy Steel, ASTM A193 B7/B7M/B16, ASTM A320 L7/L7M, Duplex, Super Duplex, and Nickel Alloy Stud Bolts are also available in accordance with the relevant ASTM and ASME material specifications.
Size & Weight Chart
Stud Bolts are manufactured according to ASTM A193, ASTM A320, DIN, ISO, and ASME standards and are available in a wide range of diameters and lengths.
| Diameter | Thread Pitch | Standard Length (mm) | Approx. Weight (kg/m) |
|---|---|---|---|
| M6 | 1.0 | 1000–3000 | 0.22 |
| M8 | 1.25 | 1000–3000 | 0.39 |
| M10 | 1.5 | 1000–3000 | 0.62 |
| M12 | 1.75 | 1000–3000 | 0.89 |
| M16 | 2.0 | 1000–3000 | 1.58 |
| M20 | 2.5 | 1000–3000 | 2.47 |
| M24 | 3.0 | 1000–3000 | 3.56 |
| M30 | 3.5 | 1000–3000 | 5.55 |
| M36 | 4.0 | 1000–3000 | 7.99 |
| M42 | 4.5 | 1000–3000 | 10.90 |
| M48 | 5.0 | 1000–3000 | 14.20 |
| M56 | 5.5 | Up to 6000 | 19.40 |
| M64 | 6.0 | Up to 6000 | 25.30 |
| M72 | 6.0 | Up to 6000 | 32.00 |
Note: Dimensions and weights are approximate and may vary depending on the material grade, thread standard (UNC, UNF, Metric, BSW, BSP), coating, and manufacturing tolerances. Custom diameters, lengths, and thread specifications are available upon request.
Grades & Equivalent
Stainless Steel Grades
304 / 304L, 316 / 316L
Carbon & Alloy Steel
Carbon Steel, ASTM A193 B7/B16,
ASTM A320 L7
Duplex & Super Duplex
UNS S31803 / 2205
UNS S32750 / 2507
High-Performance Alloys
Inconel®, Monel®, Hastelloy® Alloys
Applications
Stud Bolts are widely used in:
Oil & Gas Pipelines
Petrochemical Plants
Refineries
Power Generation Plants
Offshore & Marine Projects
Pressure Vessels
Heat Exchangers
Valves & Pumps
Industrial Process Piping
Features & Advantages
High tensile strength and durability
Excellent corrosion and oxidation resistance
Suitable for high-pressure and high-temperature applications
Uniform clamping force for leak-proof flange joints
Precision-machined threads for secure fastening
Excellent fatigue and wear resistance
Available in multiple thread standards and coatings
Long service life with low maintenance
Manufactured according to international quality standards
Mechanical Properties
The mechanical properties of Stud Bolts depend on the selected material grade and comply with applicable ASTM and ASME standards. The table below shows the typical mechanical properties for commonly supplied stainless steel grades.
| Property | SS 304 / 304L | SS 316 / 316L |
|---|---|---|
| Tensile Strength (MPa) | 515 Min | 515 Min |
| Yield Strength (MPa) | 205 Min | 205 Min |
| Elongation (%) | 40 Min | 40 Min |
| Hardness (HB Max) | 201 | 217 |
Note: Mechanical properties for Carbon Steel, Alloy Steel, ASTM A193 B7/B7M/B16, ASTM A320 L7/L7M, Duplex, Super Duplex, and Nickel Alloy Stud Bolts are available in accordance with their respective ASTM/ASME material specifications upon request.
Why Choose Moksh Tubes & Fittings LLP?
Frequently Asked Questions (FAQ)
What is a Stud Bolt?
A Stud Bolt is a fully threaded fastener used with two heavy hex nuts to connect flanges, valves, pressure vessels, and other piping components securely.
Where are Stud Bolts commonly used?
Stud Bolts are widely used in oil & gas, petrochemical plants, refineries, power plants, offshore platforms, and industrial piping systems.
Which materials are available?
We manufacture Stud Bolts in stainless steel, carbon steel, alloy steel, duplex, super duplex, and nickel alloy grades.
Do you provide material test certificates?
Yes. EN 10204 3.1 Material Test Certificates are supplied with every order.
Can you manufacture custom sizes?
Yes. We manufacture Stud Bolts in standard and custom diameters, lengths, thread types, coatings, and material grades according to customer specifications.
Request a Quote
Looking for a trusted Stud Bolts manufacturer and supplier? Contact Moksh Tubes & Fittings LLP for premium-quality industrial stud bolts, competitive pricing, ready stock, technical support, and fast worldwide delivery. Request your free quotation today.
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