Engine Cover

Automotive threaded caps are made from durable materials such as metal (e.g., aluminum, stainless steel) or high-performance plastics (e.g., nylon, polypropylene). These materials must withstand harsh conditions like extreme temperatures, pressure, vibration, and exposure to chemicals (e.g., fuel, oils, coolants).

Many threaded caps in automotive systems are exposed to fluids like brake fluid, coolant, fuel, or oil, which can be corrosive. Hence, these caps are often coated or made from corrosion-resistant materials like anodized aluminum or treated plastics to ensure longevity.

Automotive systems often operate under high pressure (e.g., fuel systems, hydraulic systems). Threaded caps are designed to create a tight, leak-proof seal to prevent fluid leakage and maintain system pressure.

The threading on automotive caps is precision-engineered to ensure a perfect fit with the corresponding component. This ensures a secure connection, reducing the risk of loosening due to vibration and engine movement.

Certain caps, especially those on fuel or oil systems, may feature tamper-resistant designs or locks to prevent unauthorized access or tampering, helping to maintain vehicle safety and integrity.