20-400 Black Aluminum Screw Top Caps

20-400 Black Aluminum Screw Top Caps are specifically designed for bottles/jars with a 20 mm opening diameter and a 400 neck finish. Made from lightweight aluminum with a smooth black surface, they are ideal for premium packaging of cosmetics, food, pharmaceuticals, and chemicals. Customizable liners are available to achieve product-specific sealing.

Standard 20-400 caps are not tamper-evident by default, but tamper-evident features can be added. Some options include tear-off rings (such as ROPP or integrated bands).

Specifications of 20-400 Black Aluminum Screw Top Caps

Thread and Dimensions

Thread Standard: "20-400" indicates a diameter of 20 mm and a thread pitch of 0.400 inches.
Neck Finish: 20-400 (20 mm diameter)
Height: 0.380 inches ±0.05 tolerance

Compatibility

Suitable for standard 20 mm glass or plastic bottle necks with 20-400 thread.
Fits glass and plastic containers, including 1 oz–2 oz Boston Round bottles

Feature	Description
Thread size	20-400 (20 mm dia, standard pitch)
Material	Aluminum (anodized/lacquered)
Finish	Matte/Glossy black
Liners	PE foam, plastisol, foil-pulp, silicone, induction
Tamper-evident	No by default; specialized types exist
Pack sizes	100–7, 500 pieces

Structure and Surface Treatment of 20-400 Black Aluminum Screw Top Caps

Material: Made from lightweight and durable aluminum (typically thin-gauge aluminum sheet), processed through anodizing or painting techniques for a premium appearance and excellent corrosion resistance.
Color/Surface Finish: Typically available in matte or glossy black, achieved through anodizing or painting. Cap walls may be smooth or knurled for enhanced grip.

Liner Options for 20-400 Black Aluminum Screw Top Caps

Liners are usually selected based on the contents:

PE Foam Liner: Compressible, suitable for syrups, cosmetics, and water-based products; chemically resistant but not tamper-evident.
Plastisol: Heat-sealed during hot filling—ideal for sauces and beverages.
Aluminum/Pulp Foil Composite, Pressure-Sensitive/Induction or Silicone/Butyl—provides stronger sealing or compatibility with olive oil/pharmaceuticals.

Table: Liner Types and Applications

Liner Type	Composition	Common Applications
Pulp & Poly	Paper + polyvinyl film	Coffee, honey, syrups, dry health foods
Pressure Sensitive (PS22)	Foam with adhesive layer	Pharmaceuticals, vitamins, supplements
Heat Induction (HS035)	Pulpboard, wax, foil, polymer	Sauces, foods requiring hermetic seals
PE Foam	Polyethylene foam	General-purpose moisture barrier
Plastisol	Plastic gasket	Hot-fill liquids (e.g., sauces, oils)

HC Aluminum Provide Black Aluminum Caps

HC Aluminum can provide black aluminum bottle caps in various sizes and specifications, with customizable options available.

Product	Description
28mm Black Aluminium ROPP Screw Cap	The 28mm Black Aluminium ROPP Screw Cap is designed for a secure roll-on pilfer-proof seal, making it ideal for bottling wine, spirits, and pharmaceutical liquids. Its sleek black anodized aluminum surface offers a premium, modern look, while the tamper-evident band ensures product integrity. It is compatible with 28mm neck finishes and supports both manual and automatic capping processes.
28mm Black Aluminum Screw Top Cap	The 28mm Black Aluminum Screw Top Cap provides a strong threaded seal for various liquid products including beverages, personal care items, and essential oils. Its durable aluminum construction resists corrosion and damage during transport. Featuring a clean black finish and optional liner configurations, it delivers reliable leak protection and shelf appeal.
18-400 Black Aluminum Screw Top Caps	The 18-400 Black Aluminum Screw Top Caps are precision-threaded closures suited for narrow-neck containers in the cosmetic, pharmaceutical, and laboratory sectors. The 18-400 thread size ensures compatibility with standard glass or plastic bottles. With a smooth black matte surface and available liners such as PE or pulp/vinyl, these caps provide secure sealing and product protection.
38mm Black Aluminum Screw Caps	The 38mm Black Aluminum Screw Caps are engineered for larger bottle openings, commonly used in food, beverage, and chemical packaging. These caps offer robust sealing properties and excellent chemical resistance, with the option of tamper-evident designs. The striking black aluminum finish enhances brand presentation while ensuring durability and ease of use.
18mm Black Aluminium Screw Closure Cap	The 18mm Black Aluminium Screw Closure Cap is perfect for slim-neck bottles used in perfumes, essential oils, and pharmaceuticals. Its compact design includes precision threading for a tight seal, and its stylish black coating delivers a sleek, high-end appearance. It is compatible with a variety of liners, ensuring optimal product protection.
30mm x 60mm Black Tamper Evident Aluminum Screw Cap	The 30mm x 60mm Black Tamper Evident Aluminum Screw Cap is specifically designed for wine and spirits. It features a long-profile cap with a tamper-evident ring that breaks upon opening, enhancing consumer safety. The black finish adds a touch of sophistication, and the cap is compatible with BVS bottle necks. Its robust design ensures airtight sealing and supports extended shelf life.

Applications of 20-400 Black Aluminum Screw Top Caps

Cosmetics and Personal Care: PE and aluminum liners for creams/oils. Syrups, sauces, cosmetics, oils, household chemicals, and beverages. Food and Beverage: Heat-induction liners for sauces/juices. Chemicals: Pulp and vinyl liners for solvent/alcohol resistance. Pharmaceuticals: Pressure-sensitive liners for tamper evidence.

Order Tips

Choose the correct bottle neck: Ensure your bottle has a 20-400 neck finish (20 mm).
Select the liner based on your product: General-purpose PE foam, heat-fill plastisol, or aluminum foil/butyl rubber for oils/chemicals.
Tamper-evidence: If required, specify tear-off seals or induction liners.
Quantity: Bulk orders reduce cost; start with a small pack to test fit and seal compatibility.

The 20-400 Black Aluminum Screw Cap is a premium-quality cap featuring a lightweight, corrosion-resistant design with customizable liners. Compatible with standard bottle types, it is available in various packaging sizes from 100-piece packs to bulk cartons. Choose appropriate liners and consider tamper-evident options based on your product needs.

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