Anti-Rust Double-Ended Screw

Product introduction

Double-headed screws, also known as studs, are fasteners with threads on both ends and a polished rod in the middle. Its core function is to act as a "connecting bridge". One end (screw-in end) is firmly screwed into the threaded hole of one component as a fixed base; the other end (fastening end) passes through the through hole of another component and is locked with a nut, thereby tightly connecting the two components. This design has significant advantages: in situations where frequent disassembly is required, only the nut needs to be tightened, which avoids damage to the base threads caused by repeated tightening and greatly facilitates equipment maintenance and repair. Therefore, it is widely used in flange connections (such as pipes, valves), heavy machinery and equipment, engines, molds and the assembly of large structural parts. It is an ideal choice for reliable, durable and maintenance-friendly connections.

 

Product features

1. Convenient disassembly and maintenance: This is its core advantage. At connection points that require frequent maintenance or adjustment, disassembly can be completed by simply twisting the nut at one end without disturbing the other end that is screwed into the base body. This greatly simplifies the maintenance process and effectively protects the base thread from wear caused by repeated screwing in and out.

 

2. Reliable connection stability: The polished rod part in the middle can smoothly fit with the through hole, and can effectively withstand shear force and some lateral forces. When the mating nut is tightened, the connection point has excellent resistance to vibration and loosening, especially suitable for equipment subject to dynamic loads.

 

3. Precise positioning and alignment: During installation, the pre-screwed studs can be used as "guide pins" to guide another component to be accurately positioned, ensuring that flange holes, equipment mounting holes, etc. can be perfectly aligned, simplifying assembly difficulty and improving installation accuracy.

 

4. Flexible adaptability: Both ends can use threads of different specifications (such as coarse threads on one end and fine threads on the other) or different lengths to meet the connection needs of specific structures. This design enhances its adaptability under complex working conditions.

 

5. Wide range of applications: From flange surface connections of heavy machinery to modular assembly of precision equipment, double-headed screws can provide stable and reliable solutions. It is an ideal component to realize detachable connection of equipment, adjust the installation distance and solve the problem of thermal expansion and contraction connection.

 

Product application

1. Flange connection field: core application scenarios. Widely used in flange connections of pipes, valves, pumps, pressure vessels and other equipment. One end of the stud is permanently fixed on the flange, and the other end is tightened with a nut to ensure reliable sealing and facilitate subsequent disassembly and maintenance.

 

2. Heavy machinery and equipment: often used for the connection of engine cylinder heads, large bearing seats, gear boxes, equipment base plates and other parts. Its structure can withstand strong vibrations and shocks and meets the high requirements for connection strength and reliability of heavy equipment.

 

3. Equipment installation and structural adjustment: used to adjust the installation gap or distance between two components. By selecting studs of different lengths or adding spacers at the screw-in end, the space can be flexibly controlled, which is common in precision adjustment situations such as mold installation and robotic arm fixing.

 

4. Construction and steel structures: used in situations where it is necessary to embed threads or connect large structural parts, such as the anchoring of equipment and concrete foundations, the connection of steel structure column feet, etc.

 

FAQ

Q: What is the main difference between double-headed screws and ordinary bolts?

A: The core difference is structure and function. Ordinary bolts have "one thread + one head" and are fixed by tightening the head. A double-headed screw is a "two-headed thread + middle polished rod" without a head. It acts as a fixed connecting column. One end is screwed into the base body and the other end is tightened with a nut. It is especially suitable for scenes that require frequent disassembly or cannot be installed from one side.

 

Q: Do the threads on both ends of a double-head screw have to be the same?

A: Not necessarily. This is a reflection of its flexibility. There are two common forms: equal diameter and same pitch: the thread specifications at both ends are exactly the same, which is the most common. Reduced diameter or pitch: one end has coarse teeth and the other end has fine teeth; or the diameters of the two ends are different. This design is used to connect two components with different standard threaded holes, or to achieve specific anti-loosening and fine-tuning functions.

 

Q: What should I pay attention to during installation?

A: The key steps are as follows: Screw-in end: Use a suitable tool (such as a special wrench for double-ended studs) to completely and vertically screw it into the threaded hole of the base body to ensure a firm bite. Intermediate polished rod: It must completely pass through the through hole of the connected parts to play the role of positioning and withstanding shear force. Fastening end: Install the washer and nut in sequence, and then use a torque wrench to tighten the nut according to the specified torque value.

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