Hex Head Cross Recess Combination Screw with Double Washer for Industrial Assembly

This hex head cross recess combination screw with double washer is developed for industrial assemblies that require strong fastening force, flexible installation methods, and consistent assembly quality. By integrating multiple functional features into one fastener, this product helps improve installation efficiency while ensuring long-term fastening stability.

The hex head structure allows high tightening torque using standard wrenches or socket tools. This makes the screw suitable for applications where strong clamping force is required, such as structural connections, equipment frames, and load-bearing assemblies. In addition, a cross recess is formed on the head, enabling installation using screwdrivers when access to hex tools is limited. This dual-drive configuration provides greater flexibility during both production and maintenance.

The screw is supplied with a pre-assembled double washer set, typically consisting of a flat washer and a spring washer. The flat washer increases the bearing surface and helps distribute tightening pressure evenly across the mounting material, reducing surface damage. The spring washer adds elastic tension that improves resistance to loosening caused by vibration, impact, or repeated operation.

The combination design eliminates the risk of missing washers during installation. This is especially important in high-volume production environments, where small assembly errors can lead to inconsistent quality or rework. By providing all components as one integrated unit, the screw ensures uniform installation results and improves overall assembly efficiency.

The machine thread structure ensures precise engagement with pre-tapped holes or matching nuts. Accurate thread geometry provides stable clamping force and repeatable fastening performance across multiple assemblies.
The black surface treatment offers a clean industrial appearance and basic corrosion resistance suitable for general indoor and equipment applications. A wide range of materials, sizes, washer configurations, and surface finishes can be customized according to customer drawings or specific project requirements.