Cylindrical Head Hexagon Socket Step Nut

Product introduction

Cylindrical head hexagonal nut, also known as stud or plug nut, is a multi-functional non-standard fastener with exquisite structure. It cleverly combines the functions of a cylindrical head hexagon socket screw and a nut into one. The lower end of the head is equipped with a precision-machined step structure, which can be accurately embedded in the installation hole and plays a key role in positioning, anti-rotation and enhancing shear resistance. When installing, it can be easily operated with an internal hexagonal wrench, providing strong clamping force. The step design can effectively distribute the load and improve the stability and accuracy of the connection point. This product is widely used in mold manufacturing, precision instruments, automation equipment, aerospace and other fields. It is especially suitable for key parts that require frequent adjustment, precise positioning and withstand complex stress. It is an ideal choice for achieving high-reliability connections.

 

Product parameters

Specifications: M12x30

Material: 45#

Strength level: 8.8

Surface treatment: salt spray blue and white zinc

 

Product Features

1. Integrated composite function: cleverly integrates the threaded connection function of the nut and the precise guiding function of the positioning pin. One part can replace the traditional "nut + positioning sleeve" combination, simplifying the structure and assembly process.

 

2. Precise positioning and anti-rotation: The step column at the lower end of the nut can achieve precise matching with the mounting hole, playing a vital radial positioning role, and can effectively prevent the nut from rotating during tightening or use, ensuring the reliability of the connection.

 

3. Excellent shear resistance: Unlike standard nuts that only rely on the screw to bear radial force, the stepped column of this product can withstand greater shear force, significantly improving the stability and strength of the connection point when subjected to lateral loads.

 

4. Easy to install and maintain: It adopts internal hexagonal drive mode and can be operated from the top with only an Allen wrench, which is very suitable for compact designs with limited space. At the same time, it is easy to disassemble and facilitate the maintenance and debugging of the equipment.

 

5. Improve structural rigidity and stability: After the step plunger is inserted into the installation hole, it can enhance the overall rigidity of the connection point and reduce shaking. It is especially suitable for occasions with vibration or requiring high-precision alignment, such as molds, automated robotic arms, etc.

 

Product application

1. Precision molds and tooling fixtures: Used as guide posts, positioning pins and fasteners, its step structure can ensure precise alignment and reliable fixation of mold cores, templates or fixture modules, effectively prevent radial movement, and withstand huge clamping force and shear force.

 

2. Automation and robotic equipment: widely used in the connection of key parts such as robot joints, linear module ends, and conveyor line brackets. The step part provides precise positioning, the internal hexagonal drive facilitates installation in a compact space, and the overall structure can effectively resist continuous vibration and impact caused by movement.

 

3. High-end mechanical equipment and transmission systems: In printing machinery, textile machinery, and packaging equipment, it is often used to connect components such as adjusting rollers and gearbox covers that require precise axial positioning and bear compound loads to ensure smooth transmission and long-term accuracy.

 

4. Aerospace and precision instruments: suitable for modular units that require frequent internal debugging and maintenance. Its one-piece design reduces the number of parts and weight, while ensuring connection rigidity and anti-loosening performance under harsh working conditions.

 

FAQ

Q: What is the core advantage of this nut? What is the difference between it and an ordinary nut and washer combination?

A: Its core advantages are functional integration and precise positioning.

Ordinary nut + washer: only provides axial locking force and cannot prevent radial movement and rotation. Step nut combines the functions of nut, gasket and positioning pin into one. Its step structure can be accurately embedded in the installation hole to achieve radial positioning, anti-rotation and withstand shear force, providing connection rigidity, precision and reliability that far exceeds ordinary combinations.

 

Q: Is there anything special that needs to be paid attention to during installation?

A: Yes, please pay attention to the following points: Hole chamfering: There must be appropriate chamfering at the entrance of the mounting hole to guide the steps into smoothly and prevent gnawing and burrs. Avoid violent knocking: Use a soft hammer to gently knock in or use a press to press in. Avoid directly hammering the nut threads or hexagonal holes. Torque control: When final tightening, torque should be applied to the hexagonal socket, not the step. It is recommended to use a torque wrench to avoid thread damage or "seizing" of the step and hole wall due to over-tightening.

 

Q: What is its anti-loosening effect under heavy load or strong vibration environment?

A: Its anti-loosening ability mainly comes from two aspects: Mechanical anti-loosening: The tight fit of the steps and the holes fundamentally prevents the nut from radially loosening and rotating, which is impossible for ordinary nuts. Thread anti-loosening: It can be used in combination with other anti-loosening measures, such as matching with anti-loosening washers, or using nylon inserts or all-metal locking threads with anti-loosening functions, thus providing extremely reliable anti-loosening protection under heavy loads and strong vibrations.

 

Company Profile

Our company is a professional manufacturer of non-standard hardware parts, focusing on customized R&D and production of various special-shaped fasteners and precision metal parts for customers. We are proficient in comprehensive processes such as cold heading, turning, milling, CNC, stamping, and die-casting, and can quickly provide solutions that meet special size, material, and performance requirements based on your drawings or needs. Products are widely used in new energy, semiconductors, communication equipment, automobiles, medical and other fields. With mature technology, strict quality control and efficient service, we will become your reliable R&D and manufacturing partner.

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