Hexagon Socket Slotted Screw

Product introduction

The external hexagonal slotted screw (slotted at the bottom of the screw) is a custom-made non-standard part with an innovative structure. Based on the traditional external hexagonal screw, it has a special slot in the axial direction at the bottom of the screw to achieve the dual functions of tightening and positioning. This unique design not only retains the strong torque-bearing characteristics of the hexagonal head, but also provides precise positioning, anti-rotation or auxiliary fixing capabilities through the bottom notch, making it an ideal solution for complex assembly scenarios. As an excellent representative of non-standard parts made in China, this product reflects our professional capabilities in functional integration design. Our professional non-standard parts factory has established a full-process production system from design to mass production for such composite functional fasteners.

 

Product design and features

Structural design innovation: axial slotting at the bottom: Precision slots are opened along the axis of the screw end. The slot width, slot depth and slot shape can be customized according to functional requirements. Dual-function integration: the upper part achieves strong locking, and the lower part achieves precise positioning or anti-rotation. Cooperative design of slots and threads: ensures optimal cooperation between the slot position and the end of the thread to avoid stress concentration. Multi-functional variant design: can be designed into various forms such as through slots, blind slots, tapered slots, keyways, etc.

 

Manufacturing process features: Sequential forming technology: first cold heading to form the screw body, and then accurately processing the bottom notch to ensure relative position accuracy; notch finishing technology: using slow wire cutting or precision milling to ensure notch dimensional accuracy and surface quality; stress relief treatment: special stress relief treatment is performed after notch processing to prevent cracking during use; thread protection technology: the thread is fully protected during the processing to avoid damage.

 

Performance advantages: One nail can be used for multiple purposes, reducing the number of parts and assembly processes. The bottom notch can realize circumferential positioning of shaft parts with a positioning accuracy of ±0.05mm. The elastic locking function can be integrated to provide an anti-loosening effect through notch deformation. The notch can be used as a lubricant storage chamber or oil guide groove, which is suitable for precise guidance and positioning of automated assembly.

 

Materials and application areas

Carbon steel series, stainless steel series, alloy steel, special materials: titanium alloy, high temperature alloy and other special materials.

Application fields: This innovative non-standard part made in China is widely used in many industries: precision mechanical transmission: axial positioning and anti-rotation of synchronous pulleys and sprockets, automation equipment: precise positioning and fixation of linear modules and robot parts, mold manufacturing: integrated positioning and fixation of mold inserts and sliders Chemicals, automobile parts: positioning and fixation of gearbox synchronizers and steering system components, textile machinery: rapid positioning and installation of rollers and yarn guides, printing equipment: precise circumferential positioning of printing rollers, medical equipment: positioning locking of adjustable mechanisms, instrumentation: fine-tuning positioning mechanisms of precision optical components.

 

Quality control and certification system

As a professional non-standard parts factory, we have established a special quality control system for bottom slotted screws.

Inspection and testing items: dimensional accuracy testing, material and performance testing, functional verification testing, etc.

Certification system: ISO 9001:2015 quality management system certification, IATF 16949 automotive industry quality management system (some production lines), products comply with GB/T, DIN, ANSI and other relevant standards, and materials can provide 3.1/3.2 material certificates.

 

Special process control: In the cold heading non-standard parts factory, special control for the bottom grooving process: 100% pre-inspection of dimensions before grooving to ensure processing reference accuracy, tool life management for grooving to prevent quality degradation due to tool wear, post-processing magnetic particle inspection or eddy current testing to ensure no micro-cracks, full-size inspection of the first batch of production, and batch production statistical process control (SPC).

 

Customized services: We provide a full range of customized non-standard parts solutions, including demand analysis stage, engineering design stage, and customizable parameter range.

Production service process: Rapid prototyping: functional samples are provided in 3-7 working days, small batch verification: 50-1000 pieces process verification batch, mass production: automated production line, monthly production capacity up to 1 million pieces, supporting services: providing installation instructions and special tool design solutions.

Technical support and services: Free application consultation and selection guidance, on-site technical support and assembly training, regular quality tracking and performance feedback collection, and emergency order rapid response mechanism (72-hour expedited service).

 

FAQ

Q: What are the advantages of slotting at the bottom of the screw compared to traditional positioning pins?

A: This customized non-standard part integrates fastening and positioning functions, reducing the number of parts, simplifying the assembly process, and improving positioning accuracy and consistency. Compared with the traditional positioning pin + screw solution, it can save more than 30% of assembly time.

 

Q: How does the groove at the bottom affect the strength of the screw?

A: Through professional structural optimization and finite element analysis, we control the stress concentration coefficient within a reasonable range. For customized non-standard carbon steel parts, we use local strengthening heat treatment to ensure that the strength of the grooved area is not reduced and the overall strength can still meet the corresponding grade requirements.

 

Q: How long is the customized production cycle for this kind of screw?

A: Standard customization process: after design confirmation, it takes 5-10 working days for samples, 15-20 working days for small batches, and 30-45 working days for large batches. As a professional non-standard parts factory, we have a fast track, and emergency needs can be compressed to 60% of regular time.

 

Q: What special shapes can the bottom notch be designed into?

A: We can design a variety of special groove shapes: tapered grooves for precise alignment, arc grooves for elastic locking, T-shaped grooves for positioning with the slider, and special-shaped grooves for error-proof assembly. As an expert in non-standard parts made in China, we have successfully developed dozens of functionalized geometries.

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