24-400 Aluminum Screw Cap With Customizable Liner Options

The 24-400 Aluminum Screw Cap is a premium sealing solution designed specifically for glass or plastic bottles with a 24mm opening. It combines functionality with aesthetics, featuring a silver aluminum construction that ensures a lightweight yet high-end appearance. The customizable liner options make it suitable for a wide range of products, from food and cosmetics to chemicals and pharmaceuticals.

The 24-400 aluminum screw cap is widely used, offering a blend of high-end appearance and engineered liner solutions for various industries. For optimal results, it is recommended to request samples and conduct product-specific sealing tests before placing bulk orders.

24-400 Aluminum Screw Cap

24-400 Aluminum Screw Cap Specifications

Thread Specification: Standard 24-400 neck finish (24mm diameter)
Material: Aluminum alloy, available in black or white finish options
Height: 0.380 ± 0.05 inches
Diameter: 24mm (neck finish: 400)
Packaging: Typically sold in units of 100 pieces per bag
Design: Threaded skirt with knurled edge for easy grip

24-400 Aluminum Screw Cap Dimensions and Finish

Neck finish: 24-400 (24 mm diameter, 400 thread pitch)
Material: Brushed or smooth-finish aluminum—lightweight, impact-resistant, and fully recyclable.
Ribbing/knurling: Optional fine ribbing on the skirt enhances grip for easy twisting off, even with wet hands.

24-400 Aluminum Screw Cap Features

Continuous Thread Closure: Standard single-thread design—easy to twist open/close.
Temperature Resistance: The aluminum cap withstands a wide range of temperatures, from high heat (e.g., autoclaving) to refrigeration.
Seal Integrity: Compressible liners provide airtight and leak-proof sealing—after hot filling, plastisol can create a vacuum seal.
Chemical Compatibility: Depends on the liner—PE foam covers a wide range of common liquids; plastisol/aluminum foil seals are better suited for acidic or oxygen-sensitive fillings. Choose liner based on the specific chemical properties of your product.

HC Aluminum Custom 24-400 Aluminum Screw Cap

24-400 Aluminum Screw Cap Customizable Liner Options

PTFE/Silicone Composite Liner: Resistant to strong acids and alkalis, suitable for high/low temperature environments, excellent sealing performance
PE Liner: Economical option, but not suitable for corrosive samples
Other Customizations: Available with pre-bonded designs (e.g., 22*3mm liners) or special colors (e.g., blue open-top caps)

Customizable Liner Options

Liners are critical for product integrity. The 24-400 cap supports 8 liner types, each suited to specific applications:

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Liner Type	Best For	Unique Properties
Pulp & Poly	Coffee, juices, honey, syrup	Biodegradable pulp layer with poly seal
Pulp and Aluminum	Cosmetic creams, automotive oils, cooking oils	Oxygen/moisture barrier; extends shelf life
Pressure Sensitive (PS22)	Pharmaceuticals, vitamins, dry supplements	Bonds to bottle upon removal; tamper-evident
Heat Induction (HS035)	Sauces, food requiring airtight seals	Requires specialized equipment; creates consumer-confidence seals
PE Foam	Aqueous cosmetics, alcohols, mild chemicals	Compressible, odor-resistant, acid/alkali-resistant (avoid hydrocarbons)
Plastisol	High-viscosity products (e.g., adhesives)	Extended lead time (3 weeks); superior adhesion
Unlined	Candles, dry goods	No seal; cost-effective
Aluminum Foil	Sensitive health products	Light-blocking; preserves potency

24-400 Aluminum Screw Cap Surface Decoration Customization

Printing/Embossing: Top/side lithographic printing, UV printing, hot stamping, screen printing.
Colors: Silver (standard), gold, black, red.

Order Flexibility:

Bulk discounts available. Plastisol liners require an additional 1-week installation time.

Additional Advantages of 24-400 Aluminum Screw Cap

Appearance: Brushed aluminum material delivers a high-end look; customizable edge colors and logo printing available.
Food and Pharmaceutical Safety: Various liners (PE foam, pulp/PE) comply with FDA standards.
Eco-Friendly: 100% recyclable metal shell.
Grip and Usability: Ribbed skirt enhances grip; optional tear-away or sealing liners provide tamper-evident functionality.

Applications of 24-400 Aluminum Screw Cap

Cosmetics/Personal Care: PE foam or pulp/aluminum foil liners for creams/lotions
Food/Beverage: Induction liners for sauces; pulp/polyethylene liners for juices
Chemicals: Pulp and vinyl liners for solvents/alcohol
Pharmaceuticals: Pressure-sensitive liners for tamper evidence

Choosing the Right Liner for Aluminum Screw Caps

For hot-filled liquids (juices, sauces): Plastisol full-disc liners are recommended.
For fragile or volatile oils: Foil or heat-seal liners are advised.
For general consumer goods (shampoo, cosmetics): PE foam or pulp/PE liners perform well.
Need for tamper-evidence: Pressure-sensitive or heat-seal liners provide peel-proof seals.

The 24-400 aluminum screw cap offers a stylish, sturdy, and customizable finish for jars and bottles. Selecting the appropriate liner ensures compatibility with your product—whether it's for hot-filled, acidic, or freshness-sensitive contents.

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