INSERT MOLDING SCREW

An INSERT MOLDING SCREW is a metal fastening component designed to be pre-positioned inside a mold and encapsulated together with the plastic material during the injection molding process. The head or shank can incorporate knurling, grooves, flats, or other anti-rotation features to securely embed the metal component within the plastic body, providing threaded connection, positioning, and assembly functions.

Product Name: INSERT MOLDING SCREW / Molded-in Screw
Thread Specifications: Metric, imperial, coarse thread, fine thread, or other specified thread profiles
Product Structure: Externally threaded stud, embedded head, stepped shank, or other special configurations
Anti-Rotation Features: Knurling, grooves, flats, fins, or polygonal head structures
Primary Dimensions: Thread diameter, thread pitch, overall length, embedded length, and head dimensions
Installation Method: Pre-positioned in the injection mold and encapsulated during molding
Applicable Plastics: ABS, PC, PA, POM, PP, and other engineering plastics
Materials: Carbon steel, stainless steel, brass, or other specified metals
Surface Treatments: Zinc plating, nickel plating, tin plating, passivation, or other specified finishes
Processing Methods: Cold forging, turning, thread rolling, knurling, and stamping
Production Options: Standard specifications or custom production based on drawings
Inspection Items: Dimensions, threads, torque, pull-out strength, and appearance

Integrally Molded with Plastic Components

The metal screw is directly encapsulated within the plastic during injection molding, helping reduce subsequent press-fitting, heat staking, or fastening operations and improving assembly efficiency.

Improves Retention Strength

Knurling, grooves, or specially shaped heads can mechanically engage with the surrounding plastic material, increasing resistance to rotation and pull-out.

Provides Durable Metal Threads

The exposed thread can be used with nuts or other mating components and is better suited for repeated assembly and applications requiring higher fastening loads.

Provides Stable Positioning Accuracy

Mold fixtures can control the screw height, orientation, and position during molding, helping maintain consistent assembly locations across mass-produced components.

Suitable for Integrated Plastic-Metal Component Designs

INSERT MOLDING SCREWS are commonly used in electronic enclosures, home appliances, automotive and motorcycle components, medical devices, communication equipment, and industrial plastic assemblies.