Cross Recessed Cupped Hex Head Bolt Assembly with Spring Washer and Flat Washer – Product Introduction

This is a standardized fastening assembly that integrates a bolt with washers into a single pre-assembled unit. The bolt head features both a cross recess and a hex head, allowing operation with either a screwdriver or a wrench. The spring washer and flat washer are sequentially fitted onto the bolt shank in the factory and cannot be removed. This design effectively prevents parts from scattering, significantly improves assembly efficiency, and utilizes the spring washer’s elastic tension to achieve self-locking anti-loosening performance.

I. Product Features

Integrated Assembly, No Scattering: The spring washer and flat washer are pre-fitted onto the bolt at the factory and will not fall off.

Multi-Faced Drive Head: Combines an external hex and an internal cross recess, allowing flexible selection of installation tools.

Built-in Anti-Loosening Mechanism: The elastic counterforce of the spring washer effectively delays bolt loosening.

Standardized Pairing: The material and strength of the bolt, spring washer, and flat washer are matched according to national standards, ensuring reliable connection performance.

Unified Surface Treatment: The entire assembly undergoes unified surface treatment such as zinc plating, resulting in a consistent appearance.

II. Product Advantages

High Assembly Efficiency: Single-hand pick-up and installation, no need to struggle with washers, especially suitable for assembly lines.

No Missing Installation, No Inspection Required: Ensures that every connection point is equipped with flat washer and spring washer, eliminating missing installations from the source.

Protects Workpiece Surface: The flat washer distributes the pressure of the bolt head on the workpiece surface, preventing denting or scratching.

Convenient Operation: The cross recess design allows a screwdriver or pneumatic driver bit to quickly align, suitable for confined spaces; the hex head can apply greater torque.

Simplified Inventory Management: One material code manages three parts, streamlining procurement and warehousing.

III. Applications

Suitable for any scenario requiring medium strength, anti-loosening requirements, and rapid assembly. Typical applications include:

Electrical and Electronic Equipment: Fixation of covers and components in distribution boxes and control cabinets.

General Metal Sheet Metal: Fastening of chassis and cabinet housings, sheet metal part guards.

Automotive Parts: Installation of interior components, fenders, lamp assemblies, and other non-core load-bearing positions.

Mechanical Equipment Assembly: Fastening of outer protective panels and accessories for small agricultural machinery, conveyors, and lift tables.

Furniture and Architectural Hardware: Connections for office chairs, metal doors and windows, and light steel keels.