Air-Tight Lug Caps: Sizes, Colours & Uses Explained

06 Aug 2026 · Crystalline Jars

Lug caps (metal twist caps) create the air-tight seal that keeps honey, jams and pickles fresh. Choosing the right size and finish completes your packaging.

Sizes

Caps are measured by neck diameter. Common sizes are 38mm, 43mm, 53mm, 63mm and 82mm. The cap must match your jar’s neck exactly for a proper seal.

Colours & finishes

Popular finishes include black (modern, premium), golden (classic, warm) and silver (clean, neutral). Match the finish to your brand’s look.

Why food-graded matters

Food-graded, imported caps have a safe internal lining and reliable air-tight gasket — essential for shelf life and food safety.

See our Lug Caps by size or request a quote for bulk caps.

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