Double-Headed Screw
Products Description
A Double-Headed Screw is a fastening element with threads at both ends, typically without a nut head. Its core function is to achieve a stable connection or positioning connection between two components. Unlike ordinary bolts, double-ended screws are more suitable for long-term fixation in a base material. One end forms a stable engagement with the base material, while the other end is used to install the connecting component.
Core structural features:
Double-ended thread design for more balanced force distribution
The middle section can be designed as a smooth stalk or a positioning section to improve assembly accuracy
Supports different thread length ratios to adapt to various installation depths
Easy to disassemble and maintain, reducing equipment maintenance costs
Core Product Properties and Features
Bidirectional Threaded Integrated Structure
The two ends of the shank utilize an integrated threading process, seamlessly connecting the threads to the shank without welding or splicing marks, ensuring uniform transmission of connection strength and force. The threads at both ends can be designed to be the same specification (adapting to the same threaded hole) or different specifications (connecting components with different thread specifications), flexibly meeting the needs of different connection scenarios.
High-strength load-bearing design
The Double-Ended Carriage Bolt adopts a solid or reinforced hollow structure and undergoes professional heat treatment to enhance tensile and shear strength, enabling it to withstand large axial loads and radial pressures. It is suitable for heavy-duty applications such as mechanical transmissions and building structures, preventing rod deformation or breakage during connection.
Precise compatibility with multiple specifications
Designed and manufactured in strict accordance with international industrial standards (ISO, ANSI, GB), covering various thread specifications (M3-M48 and imperial sizes), rod lengths (10mm-500mm), and thread types (coarse/fine, left-hand/right-hand), Double-Ended Screw can precisely adapt to the diverse connection needs of different fields such as machinery, piping, and molds.
Convenient installation and compatibility
No additional intermediate connectors are required; fastening is achieved by directly engaging the threads at both ends with the corresponding components, simplifying the assembly process. Some Double-Ended Threaded Studs feature a wrench position (hexagonal/square) in the middle of the rod, facilitating precise positioning and torque application during installation, improving installation efficiency and fastening accuracy.
Application Boundaries – From Precision Molds to Heavy-Duty Structures
The application of the Double-Ended Threaded Bolt is a crucial benchmark for measuring the precision and modularity of an industrial sector.
Mold Manufacturing: In injection molds and die-casting molds, they are used to connect and precisely align the fixed and moving molds, ensuring mold accuracy and extending service life.
Pipe and Valve Installation: In high-pressure pipeline flange connections, they act as centering bolts, ensuring perfect alignment of flange sealing surfaces and preventing leaks.
Construction and Heavy Machinery: Used to connect large steel structural components, engine blocks, and cylinder heads, their strong shear and tensile strength are fundamental to structural safety.
Electronic and Electrical Equipment: In large cabinets, transformers, and switchgear, they are used to secure modules requiring frequent disassembly and maintenance, such as circuit breakers and contactors, enabling rapid and reliable maintenance.
Material Advantages: Customized for Heterogeneous Environments and Multifunctional Interfaces
Double-Ended Stud Bolts often face different media, temperatures, or electrochemical environments at both ends, making material selection an art of balance and protection.
Integral High-Performance Alloy Steel: Utilizing materials such as 42CrMo and 40Cr, and undergoing integral tempering heat treatment, the entire Double End Fastener (including the shank) achieves uniform high strength and high toughness, ensuring that stress concentration areas (such as the thread root) do not experience brittle fracture under complex loads. Surface treatments such as zinc-nickel plating and Dacromet coating provide comprehensive protection.
Integral Stainless Steel Solution: Using 304 or 316 stainless steel, achieving the required mechanical properties (such as A2-70, A4-80) through cold working or specific heat treatment, providing homogeneous corrosion resistance from the inside out, suitable for chemical, marine, and food and pharmaceutical equipment.
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