







Introducing the versatile concave cross hexagon combination screw, affectionately known as the cross groove concave hexagon head combination screw or cross groove hexagon combination screw. This indispensable fastener is ingeniously crafted from a cross groove hexagon bolt, complemented by a flat washer and a resilient spring washer. Here's an in-depth look into its remarkable characteristics and benefits:
1, Structural Characteristics
External Hexagon Bolt: Designed with precision, this bolt boasts a hexagonal head for effortless tightening using a wrench or socket. The innovative bolt head features a cross groove, allowing the use of screwdrivers or power tools for a seamless drive.
Flat Washer: Strategically placed between the bolt and the connecting piece, it optimizes the contact area, dissipates pressure evenly, and safeguards the surface from potential scratches or damage.
Spring Washer: Nestled between the flat washer and bolt, this spring washer injects elasticity, effectively preventing loosening due to vibration or impact, thereby ensuring lasting security.
2, Common Specifications
The concave cross hexagon combination screw is available in a variety of specifications. It commonly features thread sizes such as M3, M4, M5, M6, and M8, with lengths ranging from 5mm to 90mm, adaptable to diverse connector requirements and installation environments.
3, Material and Hardness Grade
Material: Crafted from either carbon steel or stainless steel, the concave cross hexagonal combination screw ensures durability. Stainless steel offers exceptional corrosion resistance and robustness, ideal for damp or corrosive settings.
• Hardness Level: Carbon steel screws boast varying hardness levels, such as 4.8 and 8.8. The 8.8 grade provides superior strength and hardness, impeccably suited for high-load applications.
4, Application and Advantages
Widely Used: These screws are indispensable across mechanical equipment, furniture, electronics, automobiles, and more, flawlessly securing and connecting components.
Easy Installation: The cross groove design facilitates rapid installation with a screwdriver or power tool, significantly enhancing work productivity.
Reliable Fastening: The combination of flat and spring washers fortifies stability and reliability, effectively preventing loosening during operation.
5, Precautions
• Choose Appropriate Specifications: Select specifications and materials judiciously, tailored to connector requirements and environmental conditions.
Correct Installation: Ensure precise placement of flat and spring washers to avoid misalignment or omission, securing optimal performance.
Regular Inspection: For long-term use, regularly inspect the fastening integrity. Promptly tighten or replace any loosened screws to maintain structural integrity.
In summary, the concave cross hexagonal combination screw represents a masterclass in compactness, ease of installation, and reliability. It is a vital fastener across myriad machinery and equipment, necessitating appropriate selection of specifications and materials tailored to actual needs and specific installation environments.