Stud bolts and nuts are integral components in many industrial and construction applications. Understanding their specifications, uses, and pricing can significantly benefit engineers, builders, and procurement professionals.
What is a Stud Bolt and Nut?
A stud bolt is a threaded rod with threads on both ends, used to secure two parts together. Unlike traditional bolts, stud bolts lack a head, allowing them to be inserted into a tapped hole and secured with nuts on both ends. Nuts, paired with these bolts, are internally threaded fasteners that provide the clamping force to hold assemblies together.
Why are stud bolts used?
Stud bolts are preferred in various applications for several reasons:
- Uniform Load Distribution: They provide a more uniform load distribution compared to regular bolts, reducing the risk of component failure.
- Ease of Maintenance: Stud bolts facilitate easier maintenance and replacement, especially in high-temperature or high-pressure environments where frequent disassembly is required.
- Alignment: They ensure better alignment of the components being fastened, which is crucial in machinery and piping systems.
- Strength: Stud bolts offer greater tensile strength, making them ideal for critical applications.
Stud Bolts and Nuts Materials
Stud bolts and nuts are manufactured using various materials to meet specific requirements of strength, corrosion resistance, and temperature resistance. Common materials include:
- Carbon steel is widely used for general applications where high strength is required.
- Stainless Steel: Preferred for applications requiring corrosion resistance, available in grades like 304, 316, and 321.
- Alloy Steel: Used for high-temperature and high-pressure applications, often containing elements like chromium and molybdenum.
- Inconel is a nickel-chromium alloy known for its excellent oxidation and corrosion resistance at high temperatures.
- Hastelloy: A nickel-molybdenum alloy that offers excellent resistance to severe corrosion environments.
- Titanium is used for its high strength-to-weight ratio and excellent corrosion resistance, especially in marine and aerospace applications.
Stud Bolts and Nuts Dimensions
Stud bolts come in various dimensions to meet different application needs. Here is a standard dimension chart for reference:
| Bolt Diameter (mm) | Length (mm) | Thread Pitch (mm) | Nut Size (Across Flats) (mm) |
|---|---|---|---|
| 10 | 50 – 200 | 1.5 | 17 |
| 12 | 50 – 300 | 1.75 | 19 |
| 16 | 60 – 400 | 2.0 | 24 |
| 20 | 80 – 500 | 2.5 | 30 |
| 24 | 100 – 600 | 3.0 | 36 |
Stud Bolts and Nuts Price
The price of stud bolts and nuts varies based on material, size, and manufacturer. Here’s a general price range:
- Carbon Steel Stud Bolts: $0.50 – $5.00 per piece
- Stainless Steel Stud Bolts: $1.00 – $10.00 per piece
- Alloy Steel Stud Bolts: $3.00 – $15.00 per piece
Nuts are typically sold separately, with prices ranging from $0.10 to $3.00 each, depending on the material and size.
Stud Bolts and Nuts Price per kg in India
For bulk purchases, pricing per kilogram can be more relevant. Here are the general price ranges for stud bolts and nuts per kilogram in India:
- Carbon Steel Stud Bolts: ₹200 – ₹400 per kg
- Stainless Steel Stud Bolts: ₹600 – ₹1,500 per kg
- Alloy Steel Stud Bolts: ₹800 – ₹2,000 per kg
Stud Bolts and Nuts Weight Chart
Knowing the weight of stud bolts and nuts is crucial for shipping and structural calculations. Below is a weight chart for common sizes:
| Bolt Diameter (mm) | Length (mm) | Weight per 100 pcs (kg) | Nut Weight per 100 pieces (kg) |
|---|---|---|---|
| 10 | 100 | 10 | 2 |
| 12 | 150 | 15 | 3 |
| 16 | 200 | 30 | 6 |
| 20 | 250 | 50 | 10 |
| 24 | 300 | 80 | 15 |
Conclusion
Stud bolts and nuts are essential fasteners in various industries, offering strength, reliability, and ease of maintenance. Understanding their dimensions, pricing, and weight is vital for making informed purchasing and application decisions. Whether you are involved in construction, manufacturing, or maintenance, having the right information on stud bolts and nuts will ensure the success and safety of your projects.
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