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Black stud Bolt
Product Details Product Name: Double End Stud/Stud Bolt Product Overview Double-ended bolts are a special type of fastener with threads at both ends and a threaded smooth rod in the middle. They are mainly used in situations where high-strength connections are required and ordinary bolts c...
Description
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Product Details
Product Name: Double End Stud/Stud Bolt
Product Overview
Double-ended bolts are a special type of fastener with threads at both ends and a threaded smooth rod in the middle. They are mainly used in situations where high-strength connections are required and ordinary bolts cannot be used. Its typical applications include flange connections, heavy machinery assembly, pressure vessels and other fields that require detachable structures. The double-head design allows nuts to be installed on both sides separately, achieving a more flexible fastening method.
Product Features
1. Double-threaded structure design
The threads at both ends can be the same (equal-length thread) or different (longer thread at one end and shorter thread at the other)
The middle smooth rod part can provide precise positioning function
The thread specification can be selected as coarse thread (standard thread) or fine thread (high-strength connection).
2. High-strength material selection:
Carbon steel: 45# steel, 35CrMo (Grade 8.8, Grade 10.9)
- Alloy steel: 42CrMo (12.9 grade ultra-high strength)
- Stainless steel: 304, 316, 316L (for applications requiring corrosion resistance)
3. Surface treatment process:
Galvanizing (blue and white zinc, colored zinc)
- Dacromet (Excellent corrosion resistance)
Blackening (anti-rust treatment)
Hot-dip galvanizing (for heavy-duty anti-corrosion requirements)
4. Standards and Specifications:
- International standards: DIN 975/976 (German standard), ANSI B16.5 (American standard)
National Standard: GB/T 897-900
- Diameter range: M6-M64
- Length range: 50mm-3000mm (customizable)
Typical application scenarios
- Pressure vessels: Flange connections for reaction vessels and boilers
- Petrochemical industry: Installation of pipe flanges and valves
- Power equipment: Installation of transformers and generators
- Mechanical manufacturing: Assembly of large-scale equipment
- Construction engineering: Steel structure connection
Product Advantages
Flexible installation: Nuts can be installed at both ends to meet different assembly requirements
Reliable connection: The middle smooth rod provides precise alignment to prevent uneven loading
Strength selectable: From ordinary strength to ultra-high strength grade 12.9
Convenient maintenance: The detachable design facilitates equipment inspection and repair
Precautions for Use
Installation requirements:
A dedicated double-nut installation tool is required
It is recommended to use it in conjunction with anti-loosening gaskets
Ultra-high strength bolts need to be installed in conjunction with a torque wrench
Selection suggestions:
Stainless steel is preferred in corrosive environments
It is recommended to use alloy steel for high-temperature working conditions
For heavy-duty applications, it is recommended to use fine-thread threads
Technical Parameters
| Product Name: | Black Stud Bolt |
| Diameter: | M6-M64 |
| Length: | 6mm-300mm |
| Colour: | Carbon steel color/black |
| Material: | Carbon steel |
| Surface treatment: | Galvanizing |
| The above are the inventory sizes. If you need non-standard customization (special dimensions, materials or surface treatments), please contact us and we will provide you with a personalized solution. | |
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