Stainless Steel Flat-Groove Step Screws

Product introduction

Stainless steel slotted step screws, also known as bushing screws or positioning step screws, are a type of fastener with a special structure. The core of its design is that the screw has a section of unthreaded, cylindrical stepped shaft with precise diameter. This screw is primarily used where precise alignment and fastening of two or more components is required. During assembly, its stepped shaft part can be accurately inserted into the pre-processed matching holes to achieve automatic centering and positioning of parts and prevent lateral displacement or misalignment of components during the tightening process. Then, using its slotted screw head, use a standard screwdriver to screw the threaded part into the underlying base material, thereby ensuring perfect alignment between components while providing reliable axial locking force. This product is widely used in fields such as precision instruments, optical equipment, electronic product casings, mechanical assembly, and furniture. It is especially suitable for achieving stable and precise connections between panels and frames, hinges and door panels, or components that require bushings. It is an efficient solution that takes into account both positioning and fastening functions.

 

Product features

1. Precise positioning function. Its most notable feature is the precision cylindrical step integrated on the screw. During installation, this step can be used as a precise positioning pin, which is first introduced and closely matched into the pre-processed holes of the upper part to achieve automatic and rapid alignment of two or more components, effectively preventing misalignment and offset during the installation process, and ensuring assembly accuracy.

 

2. Stable anti-rotation and support The step shoulder is close to the mounting surface, which not only prevents the screw from rotating during the tightening process, but also provides uniform support between components. This disperses axial stresses, reduces local pressure loss deformation of components (especially softer or thinner materials), and improves the joint's resistance to lateral shear.

 

3. Integrated and convenient installation. Compared with the traditional "positioning pin + screw" split solution, it integrates positioning and fastening functions into a single part, eliminating the trouble of multi-step operations and alignment, greatly simplifying the assembly process, improving production efficiency, and reducing parts types and management costs.

 

4. Structural reliability and adaptability: Made of austenitic stainless steel, it has excellent strength and excellent corrosion resistance. The classic slotted slot (flat head slot) design is compatible with universal screwdriver tools and is suitable for a variety of operating environments. This structure is particularly suitable for precision instrument assembly requiring panel alignment, door panel hinge installation, or bushings.

 

Product application

1. Precision instruments and electronic equipment are widely used in the internal assembly of optical instruments, measuring equipment, high-end audio and communication chassis. Its stepped spindle precisely positions circuit board brackets, panels or internal modules, preventing minor misalignments and ensuring precise alignment of electrical connections and mechanical structures while providing a secure lock.

 

2. Furniture and hardware assembly: Ideal for installing high-end furniture, cabinet hinges, and door and window hardware. The step part of the screw can be accurately guided into the mounting hole of the hinge or accessory, achieving fast and precise alignment of the door panel and the cabinet, and can withstand the torsion and shear force caused by frequent opening and closing, avoiding displacement caused by loosening of the screws or wear of the mounting holes.

 

3. Mechanical equipment and panel fixing. It is often used for fixing instrument panels, covers and frames of control cabinets, electrical boxes, and industrial equipment. The stepped shaft can ensure precise fit between the panel and the frame holes, achieving a neat and beautiful assembly effect, and can effectively resist vibration and prevent the panel from shifting during long-term use.

 

4. Mechanisms with bushings or bushings are especially suitable for parts that need to be connected through bushings, bearing seats or composite laminates. The diameter of the stepped shaft can be precisely matched with the inner hole of the bushing to function as a positioning pin, and then tightened at the bottom layer to ensure the coaxiality and stability of the rotating or sliding parts.

 

5. General maintenance and DIY projects In maintenance or homemade projects that require precise alignment, this screw can simplify operations without the need to drill separate positioning holes or use positioning pins, providing a highly reliable integrated solution for amateurs or maintenance personnel.

 

FAQ

Q: What is the function of the "step" part (optical axis) of the step screw? What is the difference from ordinary screws?

A: Its core function is precise positioning. Ordinary screws only provide tightening force, while the optical axis part of the step screw can be accurately inserted into the pre-processed hole of the upper workpiece as a "positioning pin" before the thread is screwed in, ensuring that multiple parts are fully aligned and preventing lateral sliding misalignment during tightening, thereby achieving positioning and tightening in one go.

 

Q: Can this kind of screw be used in situations where disassembly is often required?

A: Yes, but please pay attention. The stainless steel material provides good durability, and the slot may appear worn or "slip" after repeated disassembly. Therefore, for occasions that require frequent disassembly (such as more than several times a month), it is recommended to give priority to hexagonal or plum blossom grooves with stronger torsion resistance. For occasional maintenance disassembly, it's perfectly fine.

 

Q: Why choose slotted slot instead of other slot types such as inner hexagon?

A: Slotted slot (flat head slot) is a classic design. Its main advantages are: High versatility: It can be operated with the most common slotted screwdriver, and the tool is extremely convenient to obtain.

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