High Durability 30x60mm Aluminum Screw Caps for Wine Bottles

06/23 2025

When it comes to securing and preserving the quality of wine, choosing the right closure is paramount. Our High Durability 30x60mm Aluminum Screw Caps for Wine Bottles combine robust construction, precise engineering, and sleek design to ensure your wine remains fresh and protected from contamination. Manufactured with premium aluminum alloy, these screw caps offer superior performance, durability, and aesthetics that meet the demanding needs of wineries and beverage producers.

Parameter	Specification
Material	High-quality Aluminum Alloy (AA 3004)
Dimensions	Diameter: 30 mm; Height: 60 mm
Thread Style	Screw thread type compatible with standard wine bottle neck
Liner Type	Food-grade PE/Butyl Liner with airtight seal
Finishing	Anodized or painted (custom colors available)
Weight	Approximately 4.5 grams
Yield Strength	≥ 135 MPa (Aluminum Alloy AA3004)
Corrosion Resistance	Excellent, thanks to anodizing and passivation
Operating Temperature	-40°C to +120°C

Material and Chemical Properties

The caps are manufactured using AA 3004 aluminum alloy, selected specifically for its strength and corrosion resistance. The alloy composition includes:

Our factory's experience with producing aluminum bottle caps, including smaller variants, informs our of the challenges in creating high-durability 30x60mm screw caps for wine bottles. A difference lies in the increased surface area and consequent need for superior material consistency. Minor imperfections in the aluminum alloy, often overlooked in smaller caps, become amplified in larger formats like the 30x60mm size, potentially leading to inconsistencies in sealing pressure or even cracking under stress. This necessitates stringent quality control at every stage, from raw material inspection to final thread testing, to ensure each cap meets the demanding requirements of long-term wine storage. Furthermore, the increased size requires a more robust manufacturing process, potentially necessitating adjustments to our existing machinery and possibly justifying investment in specialized equipment for consistent and precise threading.

Beyond the manufacturing process, the design of the 30x60mm cap is critical for achieving high durability. The thread profile needs optimization for a secure and leak-proof seal, while simultaneously minimizing the risk of stripping during application or removal. We've seen in case studies of similar products that excessive thread depth can weaken the cap, while insufficient depth leads to premature failure. Careful consideration of the aluminum alloy's yield strength and the interaction with the bottle's neck finish is paramount. Finally, surface treatments like anodizing become increasingly important with larger caps, not just for aesthetics, but also for enhanced corrosion resistance and improved

Element	Content (wt%)
Aluminum (Al)	Balance
Manganese (Mn)	1.0 - 1.5
Magnesium (Mg)	0.8 - 1.3
Silicon (Si)	≤ 0.6
Copper (Cu)	≤ 0.3
Iron (Fe)	≤ 0.7

benefits of this alloy:

Exceptional resistance to pitting and stress corrosion.
Excellent formability for precise threading and smooth surfaces.
Good tensile strength ensuring that caps do not easily deform under pressure.

Features

1. Superior Seal Integrity

Equipped with a food-grade PE/Butyl liner, our aluminum caps create an airtight seal that maintains wine freshness by preventing oxidation and microbial contamination.

2. Corrosion and Weather Resistance

Thanks to anodizing and passivation treatments, these caps withstand humidity, acidic environments (common from wine vapors), and temperature fluctuations, reducing the risk of corrosion-related failures.

3. Precision Threading for Smooth Application

Exact thread machining guarantees consistent engagement with bottle neck threads, ensuring ease of opening and reclosing while preventing leakage.

4. Lightweight and Durable

Weighing just under 5 grams, these caps add negligible weight but are structurally strong enough to endure stacking, shipping, and handling without damage.

5. Customizable Aesthetics

Available in natural silver, gold, black, or custom anodized colors to complement branding efforts. Finish options include matte, gloss, or textured surfaces.

Applications

Primarily designed for wine bottling, the robust physical and chemical properties make these aluminum screw caps suitable for a variety of other industries as well:

Application	Benefit
Wine Bottles	Ensures long shelf life and preserves sensory qualities of wine
Spirits and Liquor Bottles	Easy application with reliable resealing that maintains taste integrity
Olive Oil	Protects against oxidation while adding aesthetic value
Non-Carbonated Beverages	Ideal for juices, kombucha, and premium teas requiring airtight seals
Pharmaceuticals	Used for packaging select medicinal liquids needing contamination protection

Quality and Compliance Standards

Our 30x60mm aluminum screw caps are manufactured under stringent quality control processes and fully comply with:

FDA Food Contact Safety Regulations — ensuring all liners and coatings are safe for direct contact with consumables.
RoHS Directive — Restriction on Hazardous Substances.
ISO 9001 Quality Management System certified production to maintain batch consistency.
REACH compliance for responsible chemical handling.

Why Choose Our 30x60mm Aluminum Screw Caps?

Enhanced shelf appeal with smooth finish variance options.
High resistance to physical damage ensuring no spoilage or leakage.
Environmentally friendly and recyclable aluminum material aligns with green packaging trends.
Affordability combined with premium performance.

Ordering Information

Item Code	Dimensions (Ø x Height)	Liner Type	Color Finish	MOQ	Lead Time
ASC-3060-PE	30 x 60 mm	PE/Butyl Food Grade	Silver Anodized	10,000 pcs	2-3 weeks
ASC-3060-GO	30 x 60 mm	PE/Butyl Food Grade	Gold Anodized	10,000 pcs	3-4 weeks
ASC-3060-BL	30 x 60 mm	PE/Butyl Food Grade	Black Matte	10,000 pcs	3-4 weeks