A metal ring structure( fracture groove) is provided at the bottom of the tamper evident screw cap, when it is opened for the first time, the ring will break due to the torsion force, leaving obvious opening marks that cannot be restored, forming an irreversible anti-counterfeiting mark. This tamper evident design is common in food and drug packaging to ensure that the contents are not illegally opened or contaminated.

Pre-threaded tamper evident screw caps are mainly made of aluminum alloy, it is lightweight and durable, and its corrosion resistance and aesthetics can be enhanced through surface treatment (such as anodizing). Aluminum tamper evident screw caps are usually manufactured through stamping processes, including painting, pattern printing, hole pressing, secondary pressing and other steps.

Thread design: The thread design of the tamper evident cap enables it to fit tightly with the bottle mouth to ensure sealing and leakproofness. The pre-thread design allows subsequent processing on the top or side of the bottle screw cap, such as printing or labeling.

Features of tamper evident screw caps:

- Sealing: Excellent sealing performance can prevent liquid leakage and external contamination, and extend the shelf life of the product.

Tamper-proof: The tamper-proof design can effectively protect the product from being illegally opened or tampered with, and enhance consumers' sense of security.

- Lightweight: Aluminum tamper evident caps are lightweight and easy to transport and use.

- Aesthetics: Aluminum tamper evident screw caps have a smooth surface and are easy to print and spray. They can achieve a variety of colors and patterns to enhance the visual appeal of the product.

Application scenarios of tamper evident screw caps including:

- Pharmaceutical industry: For products that require strict control and protection, such as prescription drugs, over-the-counter drugs, etc., the use of tamper-proof bottle caps can increase consumer trust while complying with relevant regulatory requirements.

- Food and beverages: Especially for some high-end alcoholic beverages (whiskey, vodka), health drinks, etc., the use of tamper-proof design can not only ensure product quality, but also enhance brand image.

- Cosmetics and personal care products: These products often have certain requirements for storage conditions, and tamper evident bottle caps can effectively prevent product deterioration caused by accidental opening or contamination.

Pre-threaded tamper evident screw caps are a safe, tightly sealed, and beautiful packaging option suitable for a variety of industries. Choosing high-quality bottle caps can effectively improve product safety and market competitiveness. If you have specific needs or questions, please feel free to consult further!