Plastic Filler Neck

The plastic filler neck is the inlet used for adding windshield washer fluid. When the hood is opened, the blue cap is typically visible-this cap covers the filler neck located underneath.

This component must withstand chemical exposure from washer fluid, which contains cleaning agents and additives that may cause corrosion over time.

Our factory has 14 years of experience manufacturing this type of product. We operate a 3,000㎡ workshop with 35 injection molding workers. We use materials such as PP, PE, and PA66, all of which offer strong resistance to acids, alkalis, and washer fluid corrosion.

We use precision injection molding to ensure excellent sealing performance and prevent leakage.

Sealing reliability and chemical resistance are key priorities. If the filler neck does not seal properly, washer fluid may leak into the engine bay, potentially affecting surrounding components.

Our material selection ensures strong corrosion resistance. In addition, the sealing structure is designed to prevent leakage under operating conditions.

Aging resistance is also important, as engine bay temperatures can cause plastic components to degrade over time. Our design maintains strength and durability under long-term use.

We have an in-house R&D team and support custom designs based on drawings. Sample development typically takes 30 to 90 days.

Our factory is certified to IATF 16949 standards. Each product is fully inspected before shipment to ensure consistent quality.

Free samples are available (shipping cost paid by customer). MOQ is 1,000 pieces.

If you have any questions or customization requirements, feel free to contact us.